US20090029747A1 - Foldable mobile terminal with antennas and a selector selecting a diversity transceiving system based on folding-out or folding-in terminal - Google Patents
Foldable mobile terminal with antennas and a selector selecting a diversity transceiving system based on folding-out or folding-in terminal Download PDFInfo
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- US20090029747A1 US20090029747A1 US12/238,111 US23811108A US2009029747A1 US 20090029747 A1 US20090029747 A1 US 20090029747A1 US 23811108 A US23811108 A US 23811108A US 2009029747 A1 US2009029747 A1 US 2009029747A1
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- antennas
- antenna
- terminal
- folding
- transceiving system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0868—Hybrid systems, i.e. switching and combining
- H04B7/0871—Hybrid systems, i.e. switching and combining using different reception schemes, at least one of them being a diversity reception scheme
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
Abstract
A foldable mobile terminal comprises a pair of housings which are coupled through a hinge to make the terminal foldable, at least one antenna arranged on each of the housings, a switch connected to the antenna, at least one radio unit mounted on one of the housing and connected selectively to the antenna through the switch, and a selector to select a diversity transceiving system according to folding-out or folding-in of the terminal.
Description
- This application is a continuation of U.S. application Ser. No. 10/932,125, filed on Sep. 2, 2004, and is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2003-427846, filed on Dec. 24, 2003, the entire contents of both of which are incorporated herein by reference.
- 1. Field of the Invention
- The invention relates to a foldable mobile terminal, more particularly to a mobile terminal of a diversity transceiving system.
- 2. Description of the Related Art
- A conventional foldable mobile terminal of a diversity transceiving system monitors a receive level of a antenna and a channel quality to change a diversity transceiving system (refer to, for example, Japanese Patent Laid-Open No. 2000-183793).
- In the above conventional foldable mobile terminal of a diversity transceiving system, correlation between antennas is not considered when the diversity transceiving system is changed. Therefore, there is a problem such as incrementation of power consumption or incrementation of a circuitry scale because a receiving level and a channel quality have to be always monitored. In addition, in an antenna configuration, an antenna whose certain face becomes nondirectional, such as a monopole antenna, is not considered. For this reason, there is a problem that an electrical performance of each antenna may be deteriorated. This results mainly from a circumstance that only communication performance in the state that a majority number of conventional foldable mobile terminals are opened is considered.
- It is an object of this invention to provide a foldable mobile terminal changing a diversity transceiving system according to folding-in/folding-out of the foldable mobile terminal.
- An aspect of the present invention provides a foldable mobile terminal comprising: a pair of housings which are coupled through a hinge to make the terminal foldable; at least one antenna arranged on each of the housings; a switch connected to the antenna; at least one radio unit mounted on one of the housing and connected selectively to the antenna through the switch; and a selector to select a diversity transceiving system according to folding-out or folding-in of the terminal.
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FIGS. 1A to 1D show schematic configurations of a mobile terminal according to first to fourth embodiments of the present invention. -
FIGS. 2A and 2B show a block circuit of a mobile terminal and a schematic configuration thereof according to the first embodiment of the present invention. -
FIGS. 3A and 3B show a block circuit of a mobile terminal and a schematic configuration thereof according to the second embodiment of the present invention. -
FIGS. 4A and 4B show a block circuit of a mobile terminal and a schematic configuration thereof according to the third embodiment of the present invention. -
FIGS. 5A and 5B show a block circuit of a mobile terminal and a schematic configuration thereof according to the fourth embodiment of the present invention. -
FIGS. 6A and 6B show a block circuit of a mobile terminal and a schematic configuration thereof according to the fifth embodiment of the present invention. -
FIGS. 7A to 7C shows block circuits to explain a high frequency switch control in the mobile terminal of the fifth embodiment. -
FIGS. 8A and 8B show perspective views of a mobile terminal using an inverse F antenna and of a hinge thereof in the fifth embodiment. -
FIGS. 9A and 9B show perspective views of a mobile terminal using an inverse F antenna and a whip antenna and of a hinge thereof in the fifth embodiment. -
FIGS. 10A and 10B show perspective views of a mobile terminal using an inverse F antenna and a helical antenna and of a hinge thereof in the fifth embodiment. -
FIGS. 11A and 11B show perspective views of a mobile terminal using an inverse F antenna and of a hinge thereof in the fifth embodiment. - The embodiments will be described in detail in conjunction with the accompanying drawings.
- The first embodiment of the present invention is described using
FIGS. 1A to 2B .FIGS. 1A and 1B show an example of an antenna layout of a foldable mobile terminal.FIGS. 1A and 1B show a side view of the terminal and a perspective view thereof in the state that the terminal is folded out, respectively.FIGS. 1C and 1D show a side view of the terminal and a perspective view thereof in the state that the terminal is folded in, respectively. - The mobile terminal is freely foldable with a
first housing 103 and asecond housing 104 being coupled to each other by ahinge 105 to be foldable. InFIG. 1C , assuming that the surface that thefirst housing 103 and thesecond housing 104 face with each other is an inner face, and the face that they do not face with each other is an outer face. Whenantennas second housings antennas second housings first housing 103 and the lower corner of thesecond housing 104, respectively, which are displaced in a width direction of the housing. In other words, theantennas second housings housings antennas housings antenna 101 does not contact the housing or theantenna 102. Consequently, degradation of an electrical performance due to contact between the antennas is avoided. Also, thefirst housing 103 is equipped with a display, a speaker, a camera (not shown), etc. Thesecond housing 104 is equipped with a microphone, a key panel (not shown), etc. - An example of a selective diversity receiving mode to switch the antennas with a switch in this embodiment is described in conjunction with
FIGS. 2A and 2B .FIG. 2A shows a block circuit of a selective diversity transceiving system.FIG. 2B shows a mobile terminal of an example of a selective diversity transceiving system. - The
first antenna 201 is arranged on, for example, a right upper corner on the outside face of afirst housing 205. Thesecond antenna 202 is arranged on a left lower corner of the outside face of thesecond housing 206. In other words, theantennas second housings antennas high frequency switch 203. The antenna to be connected to theradio unit 204 is selected with this high-frequency switch 203. Then, it is desirable for acquiring an electrical performance not less than that of a single antenna by the selective diversity transceiving system that the first andsecond antennas - According to the embodiment, since the first and
second antennas - The second embodiment of the present invention is described in conjunction with
FIGS. 1A to 1D andFIGS. 3A and 3B . - In the present embodiment, there will be described a case of performing a synthesis diversity receiving mode synthesizing the received signals of a plurality of antennas with a synthesizer referring to
FIGS. 3A and 3B .FIG. 3A shows a block circuit of a synthesis diversity transceiving system.FIG. 3B shows a mobile terminal with the synthesis diversity transceiving system. - The
first antenna 301 is arranged on, for example, a right upper corner of the outside face of afirst housing 306. Thesecond antenna 302 is arranged on a left lower corner of the outside face of asecond housing 307. In other words, theantennas second housings second antennas second antennas second radio units - The first and
second radio units synthesis unit 305. Thesynthesis unit 305 synthesizes detection signals from the first andsecond radio units second antennas - According to the second embodiment, since the first and
second antennas - The third embodiment of the present invention will be described in conjunction with
FIGS. 1A to 1D andFIGS. 4A and 4B . - In the present embodiment, an example of a selective diversity receiving mode to switch the antennas with a switch and a synthesis diversity receiving mode to synthesize the received signals of a plurality of antennas by a synthesizer is described in conjunction with
FIGS. 4A and 4B . -
FIG. 4A shows a block circuit of a mobile terminal performing at least one of the selective diversity transceiving system and the synthesis diversity transceiving system.FIG. 4B shows an example of the radio terminal. - A
first antenna 401 is arranged on, for example, a right upper corner of the outside face of afirst housing 407. Asecond antenna 401 is arranged on a left lower corner of the outside face of asecond housing 408. In other words, theantennas second housings second antennas antennas frequency switch 403. The antenna to be connected to the first andsecond radio units frequency switch 403. The first andsecond radio units synthesis unit 406. Thesynthesis unit 406 synthesizes detection signals from the first andsecond radio units - The synthesis diversity transceiving system is compared with the selective diversity transceiving system in the
synthesis unit 406. The diversity transceiving system to be used is determined by evaluating a communication performance or a power consumption. Then, in order to acquire an electrical performance not less than that obtained by a single antenna by executing at least either the selective diversity transceiving system or the synthesis diversity transceiving system, it is desirable that the first andsecond antennas - Since the first and
second antennas -
FIGS. 5A and 5B show an embodiment of a mobile terminal in which three antennas are installed.FIG. 5A shows a block circuit of a mobile terminal doing at least either a selection diversity transceiving system or a synthesis diversity transceiving system.FIG. 5B shows an example of configuration of the mobile terminal. - The fourth embodiment of
FIGS. 5A and 5B differs from the third embodiment ofFIGS. 4A and 4B in the point that athird antenna 507 installed in afirst housing 508 is connected to a high-frequency switch 503. In other words, thefirst antenna 501 is installed in, for example, the right upper corner of the outside face of thefirst housing 508. Thesecond antenna 502 is installed in a left lower corner of the outside face of thesecond housing 509, and theantennas second housings third antenna 507 is arranged on the left side corner of the outside face of thefirst housing 508 so that it is not in contact with thesecond antenna 502. That is to say, the first andthird antennas second antenna 502 when the terminal is folded in. - Two antennas of the first, second,
third antennas third antennas - The fifth embodiment of the present invention is described referring to
FIGS. 1A to 1D , 6A, 6B, and 7A to 7C. - At first, a method of changing the diversity systems is described referring to
FIGS. 6A and 6B .FIG. 6A shows a block circuit of a mobile terminal changing a selective diversity receiving mode and a synthesis diversity receiving mode according to the folding-in/folding-out of the terminal.FIG. 6B shows an example of configuration of the mobile terminal. - The
first antenna 601 is installed in, for example, a right upper corner of the outside face of thefirst housing 611. Thesecond antenna 602 is installed in a left lower corner of the outside face of thesecond housing 612. In other words, theantennas second housings second antennas antennas frequency switch 603. This high-frequency switch 603 selects an antenna to be connected to the first andsecond radio units second radio units synthesizer 606. - The
synthesizer 606 synthesizes detection signals from the first andsecond radio units out detector 607 notifies a feedingcontroller 608 and aswitch controller 609 of the opening/closing state of thehousings out detector 607 may comprise a Hall sensor using change of a magnetic field, a reed switch or a changeover switch that is physically pushed by a projection provided inside thehousing 611 when the terminal is folded in. - The feeding
controller 608 controls a power supply to thefirst radio unit 604 according to the opening/closing state of the housings. Theswitch controller 609 controls switching of the high-frequency switch 603 according to the opening/closing state of the housings and a receiving level of thesecond radio unit 605 notified by areceiving level detector 610. - The control of power supply to the
radio unit 604 according to the opening/closing state of the housings and the control of the high-frequency switch 603 are described in conjunction withFIG. 7 .FIG. 7 shows only afirst antenna 701, asecond antenna 702, a high-frequency switch 703, afirst radio unit 704, asecond radio unit 705, a feedingcontroller 706, aswitch controller 707 in correspondence with thefirst antenna 601,second antenna 602, high-frequency switch 603,first radio unit 604,second radio 605, feedingcontroller 606,switch controller 607 ofFIG. 6 . Other elements shown inFIG. 6 are omitted inFIG. 7 . - The state that the housings are opened is shown in
FIG. 7A . In this state, the feedingcontroller 706 admits power-supplying to thefirst radio unit 704. Theswitch controller 707 controls the high-frequency switch 703 so that thefirst antenna 701 is connected to theradio unit 704 and thesecond antenna 701 is connected to thesecond radio unit 705. The detection signals from the first andsecond radio units - The state that the terminal is folded in is shown in
FIG. 7B andFIG. 7C . In this state, the feedingcontroller 706 stops power-supplying to thefirst radio unit 704, and theswitch controller 707 controls the high-frequency switch 703 to connect thesecond radio unit 705 to thefirst antenna 701 or thesecond antenna 702. In theradio unit 705, a receiving level obtained when thefirst antenna 701 is connected to thesecond radio 705 as shown inFIG. 7B is compared with a receiving level obtained when thesecond antenna 702 is connected to thesecond radio unit 705 as shown inFIG. 7C . If theradio unit 705 selects the connection indicating the higher receiving level, the effect of the selective diversity transceiving system can be expected. - As discussed above, the synthesis diversity transceiving system is selected when the terminal is folded out. The selective diversity transceiving system is selected when the terminal is folded in. In this case, it is desirable that the first and
second antennas - According to the configuration of the present embodiment, since an electrical performance of each antenna is not deteriorated regardless of the folding-in/folding-out of the terminal, it is possible to obtain an electrical performance not less than that obtained by a single antenna by performing at least either the selective diversity transceiving system or the synthesis diversity transceiving system.
- The folding-out of the terminal lowers the correlation between the antennas to be appropriate for the synthesis diversity transceiving system, because a distance between the
first antenna 601 of thefirst housing 611 and thesecond antenna 602 of thesecond housing 612 increases. The folding-in of the terminal enhances the correlation between the antennas due to a pattern diversity effect to be appropriate for the selective diversity transceiving system, because the distance between thefirst antenna 601 of thefirst housing 611 and thesecond antenna 602 of thesecond housing 612 decreases. - As the installation positions of the first and
second antennas hinge 613, the distance between the antennas when the terminal is folded out increases. For this reason, the correlation between the antennas lowers resulting in increasing the effect of the synthesis diversity transceiving system. Therefore, it is effective to change the diversity system according to the folding-in/folding-out of the terminal. - The concrete antenna elements applied to the embodiment of
FIGS. 6A and 6B are explained referring toFIGS. 8A to 11B .FIGS. 8A and 8B show an example adoptinginverse F antennas second housings FIG. 8A shows the folding-out of the terminal, andFIG. 8B shows the folding-out thereof. Theinverse F antennas second housing substrates - Since the
inverse F antennas hinge 813 as shown inFIG. 8B , a distance between the antennas is large in the state that the terminal is folded out, and it is small in the state that the terminal is folded in. As described below, when the distance between the antennas is large, correlation between the antennas becomes small due to a space diversity effect. Therefore, the synthesis diversity transceiving system is preferable. When the distance between the antennas is small, the correlation between the antennas becomes small due to a pattern diversity effect. Thus, the selection diversity transceiving system is preferable. - There will be explained a mechanism that the pattern diversity occurs. In the case of the antenna selection diversity transceiving system, the unselected antenna becomes an open end as shown in
FIGS. 7B and 7C . In this case, the antenna element can act as a parasitic element. This parasitic element changes a radiation pattern of the selected antenna element. An electromagnetic field coupling occurs between a feed antenna and a parasitic element adjacent thereto, so that a current distribution occurs on the parasitic element. An antenna pattern changes due to radiation from this current. This change makes it possible to lower a correlation coefficient because of a diversity effect to call a radiation pattern diversity. As described above, even if the antennas are adjacent to each other, it becomes possible to suppress a correlation between the antennas by applying a pattern diversity effect. As a result, an improved diversity performance can be realized. - However, this pattern diversity is not suitable for the synthesis diversity transceiving system showing an effect when the antenna element is nondirectional, because it causes a comparatively large distortion on the radiation pattern of the antenna.
- On the other hand, in the case of the synthesis diversity transceiving system, too, when viewing from the antenna the other antenna, the other antenna acts like the parasitic element. However, in this case, because both antennas are connected to a radio circuit, an apparent parasitic element is connected to a reflectionless terminal. Since the reflectionless terminal absorbs an induced current generated in the parasitic element due to an electromagnetic field coupling, the change of the radiation pattern of the antenna becomes small in comparison with the selection diversity transceiving system. In other words, when the antennas are adjacent to each other, if the synthesis diversity is done, the space diversity effect and the pattern diversity effect do not act effectively, resulting in the diversity performance is not enough brought out. Accordingly, in this case, it is desirable to use the space diversity which provides a diversity effect by increasing the antenna-to-antenna distance with the terminal being folded out. In this case, two antennas provide inherent radiation characteristics, that is, non-directionalities, because they separate from each other to weaken a coupling. As thus described, when the terminal is folded out, the synthesis diversity transceiving system is preferable, because the radiation patterns of two antennas are substantially nondirectional and the correlation between the patterns is low.
- As described above, in this configuration, when two antennas assume as a diversity antenna, it is obvious that the diversity effect varies according to the folding-in/folding-out of the terminal. Further, a diversity reception system suitable for the folded-out terminal or the folded-in terminal is obvious according to the folding-in/folding-out of the terminal. Thus, it is possible to determine an optimum diversity transceiving system according to the folding-in/folding-out of the terminal. As a result, it is unnecessary to monitor a receiving level and a channel quality, and it is possible to suppress incrementation of power consumption and incrementation of a circuit scale.
- In
FIG. 8 , the high-frequency switch 803, the first andsecond radio units synthesizer 806, the folding-in/folding-out detector 807, the feeding controller 808, theswitch controller 809, thereceiving level detector 810 correspond respectively to the high-frequency switch 603, the first andsecond radio units synthesizer 606, the folding-in/folding-out detector 607, the feedingcontroller 608, theswitch controller 609, thereceiving level detector 610 shown inFIG. 6 . -
FIG. 9 shows an example adopting awhip antenna 901 to afirst housing 911, and aninverse F antenna 902 to asecond housing 912.FIG. 9A shows a state that the housings open, andFIG. 9B shows a state that the housings close. Thewhip antenna 901 andinverse F antenna 902 are connected to antenna feeding points 916 and 917 provided on first andsecond housing substrates - As shown in
FIG. 9B , thewhip antenna 901 andinverse F antenna 902 are arranged outside the housings and theinverse F antenna 902 is located far from thehinge 913. Thus, when the housings open, the antenna-to-antenna distance is large, and when they close, it is small. When the antenna-to-antenna distance is large, the synthesis diversity transceiving system is suitable, because the antenna-to-antenna correlation becomes small due to a space diversity. When the antenna-to-antenna distance is small, the selection diversity transceiving system is suitable, because the antenna-to-antenna correlation becomes small due to a pattern diversity. As described before, since an optimum diversity transceiving system can be selected according to the folding-in/folding-out of the terminal, it is unnecessary to monitor a receiving level or a channel quality, and it is possible to suppress incrementation of a power consumption and a circuit scale. - In addition, since the antennas are arranged so that they do not overlap when the housings close, an electrical performance of each antenna does not deteriorate even when the housings close. Further, the diversity transceiving system can provide an electrical performance more than that obtained by a single antenna.
- In
FIG. 9 , the high-frequency switch 903, the first andsecond radio units synthesizer 906, the folding-in/folding-out detector 907, the feedingcontroller 908, theswitch controller 909, thereceiving level detector 910 correspond to the high-frequency switch 603, the first andsecond radio units synthesizer 606, the folding-in/folding-out detector 607, the feedingcontroller 608, theswitch controller 609, thereceiving level detector 610 shown inFIG. 6 , respectively. -
FIGS. 10A and 10B show an example adopting ahelical antenna 1001 to afirst housing 1011 and aninverse F antenna 1002 to asecond housing 1012.FIG. 10A shows a state that the terminal is folded out, andFIG. 10B illustrates a state that it is folded in. - The
helical antenna 1001 andinverse F antenna 1002 are connected toantenna feeding points housing substrates FIG. 10B , thehelical antenna 1001 andinverse F antenna 1002 are disposed outside the housings, and theinverse F antenna 1002 is arranged far fromhinge 1013. Therefore, the antenna-to-antenna distance is large when the terminal is folded out, and it is small when it is folded in. - The synthesis diversity transceiving system is preferable when the antenna-to-antenna distance is large, because the antenna-to-antenna correlation is low due to a space diversity. The selective diversity transceiving system is preferable when the antenna-to-antenna distance is small, because the antenna-to-antenna correlation is low due to a pattern diversity.
- As described before, since an optimum diversity transceiving system can be selected according to the folding-in/folding-out of the terminal, it is unnecessary to monitor a receiving level or a channel quality, and it is possible to suppress incrementation of a power consumption and a circuit scale. In addition, since the antennas are arranged so that they do not overlap when the terminal is folded in, an electrical performance of each antenna does not deteriorate even when the terminal is folded in. Further, the diversity transceiving system can provide an electrical performance not less than that obtained by a single antenna.
- In
FIG. 10A , the high-frequency switch 1003, the first andsecond radio units synthesizer 1006, the folding-in/folding-out detector 1007, thefeeding controller 1008, theswitch controller 1009, thereceiving level detector 1010 correspond to the high-frequency switch 603, the first andsecond radio units synthesizer 606, the folding-in/folding-out detector 607, the feedingcontroller 608, theswitch controller 609, thereceiving level detector 610 shown inFIG. 6 , respectively. -
FIG. 11 shows an example adoptinginverse F antennas second housings FIG. 11A shows a state that the terminal is folded out, andFIG. 11B shows a state that it is folded in. - The
inverse F antennas antenna feeding points second housing substrates FIG. 11B ,inverse F antennas hinge 1113. Therefore, the antenna-to-antenna distance is large when the terminal is folded out, and it is small when it is folded in. - The synthesis diversity transceiving system is suitable when the antenna-to-antenna distance is large, because the antenna-to-antenna correlation is low due to a space diversity. The selective diversity transceiving system is preferable when the antenna-to-antenna distance is small, because the antenna-to-antenna correlation is low due to a pattern diversity.
- As described before, since an optimum diversity transceiving system can be selected according to the folding-in/folding-out of the terminal, it is unnecessary to monitor a receiving level or a channel quality, and it is possible to suppress incrementation of a power consumption and a circuit scale. In addition, since the antennas are arranged so that they do not overlap when the terminal is folded in, an electrical performance of each antenna does not deteriorate even when the terminal is folded in. Further, the diversity transceiving system can provide an electrical performance not less than that obtained by a single antenna.
- In
FIG. 11A , the high-frequency switch 1103, the first andsecond radio unit synthesizer 1106, the folding-in/folding-out detector 1107, thefeeding controller 1108, theswitch controller 1109, thereceiving level detector 1110 correspond to the high-frequency switch 603, the first andsecond radio units synthesizer 606, the folding-in/folding-out detector 607, the feedingcontroller 608, theswitch controller 609, thereceiving level detector 610 shown inFIG. 6 , respectively. - The above embodiment describes an example of a mobile terminal wherein antennas are mounted on the first and second housing, respectively. However, even if two or more antennas are arranged without contacting with each other, the effect not less than the previous effect can be expected.
- Additional advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described herein. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.
Claims (19)
1. A method for changing a diversity transceiving system, comprising:
arranging at least two antennas on a pair of housings of a terminal coupled through a hinge to make the terminal foldable, respectively, in diagonal relationship to fail to overlap with each other in a state that the terminal is folded-in;
connecting selectively at least two radio units, mounted on one of the housings corresponding with the antennas, to the antennas through a switch;
selecting, only on the basis of whether the terminal is folded-out or folded-in, a synthesis diversity transceiving system for synthesizing detection signals of the radio units when the terminal is folded-out and selecting a selective diversity transceiving system for selecting one of the antennas that provides a receiving level higher than other of the antennas, when the terminal is folded-in.
2. The method according to claim 1 , wherein the selecting comprises detecting folding-in or folding-out of the terminal, and switching between the synthesis diversity transceiving system and the selective diversity transceiving system according to a detection result of folding-in/folding-out of the terminal.
3. The method according to claim 1 , further including selecting one of the antennas after switching to the selective diversity transceiving system.
4. The method according to claim 1 , further installing another antenna in the other of the housings.
5. The method according to claim 1 , wherein each of the antennas installed in the housings respectively comprises an inverse F antenna.
6. The method according to claim 1 , wherein one of the antennas which is installed in one of the housings comprises a whip antenna, and the other of the antennas which is installed in the other of the housings comprises a reverse F antenna.
7. The method according to claim 1 , wherein one of the antennas which is installed in one of the housings comprises a helical antenna, and the other of the antennas which is installed in the other of the housings comprises a reverse F antenna.
8. The method according to claim 1 , further comprising detecting a receiving level of the radio unit, and selecting one of the antennas that provides a higher receiving level than other of the antennas according to a detected result.
9. The method according to claim 1 , wherein the selecting includes synthesizing the detection signals of the radio units in the synthesis diversity transceiving system.
10. The method according to claim 9 , wherein the synthesizing includes synthesizing the detection signals with their phases being matched.
11. The method according to claim 2 , further comprising controlling power-supplying to the radio unit according to the detection result of the folding-in/folding-out.
12. The method according to claim 1 , wherein when the synthesis diversity transceiving system is selected, the antennas are respectively connected to the radio units, and when the selective diversity transceiving system is selected, only one of the antennas is connected to one of the radio units.
13. The method according to claim 12 , wherein when the selective diversity transceiving system is selected, the antenna having a highest receiving level is connected to the one radio unit.
14. The method according to claim 12 , further including cutting off power to one of the radio units when the selective diversity transceiving system is selected.
15. The method according to claim 1 , further including cutting off power to one of the radio units when the selective diversity transceiving system is selected.
16. A method for changing a diversity transceiving system, comprising:
connecting at least two radio units selectively to at least two antennas arranged on a pair of housings of a terminal coupled through a hinge to make the terminal foldable through a switch; and
controlling the switch to respectively connect the antennas to the radio units in a synthesis diversity transceiving mode for synthesizing detection signals of the radio units when the terminal is folded-out, and connect only one of the antennas to only one of the radio units in a selective diversity transceiving mode when the terminal is folded-in.
17. The method according to claim 16 , comprising arranging the antennas in a non-overlapping diagonal relationship with each other in a state that the terminal is folded-in.
18. The method according to claim 16 , wherein when the terminal is folded-in, the antenna having a highest receiving level is connected to the one radio unit.
19. The method according to claim 16 , further including cutting off power to one of the radio units when the terminal is folded-in.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/238,111 US20090029747A1 (en) | 2003-12-24 | 2008-09-25 | Foldable mobile terminal with antennas and a selector selecting a diversity transceiving system based on folding-out or folding-in terminal |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003427846A JP2005244260A (en) | 2003-12-24 | 2003-12-24 | Portable radio terminal |
JP2003-427846 | 2003-12-24 | ||
US10/932,125 US7444175B2 (en) | 2003-12-24 | 2004-09-02 | Foldable mobile terminal with antennas and a selector selecting a diversity transceiving system based on folding-out or folding-in terminal |
US12/238,111 US20090029747A1 (en) | 2003-12-24 | 2008-09-25 | Foldable mobile terminal with antennas and a selector selecting a diversity transceiving system based on folding-out or folding-in terminal |
Related Parent Applications (1)
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US10/932,125 Continuation US7444175B2 (en) | 2003-12-24 | 2004-09-02 | Foldable mobile terminal with antennas and a selector selecting a diversity transceiving system based on folding-out or folding-in terminal |
Publications (1)
Publication Number | Publication Date |
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US20090029747A1 true US20090029747A1 (en) | 2009-01-29 |
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Application Number | Title | Priority Date | Filing Date |
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US10/932,125 Expired - Fee Related US7444175B2 (en) | 2003-12-24 | 2004-09-02 | Foldable mobile terminal with antennas and a selector selecting a diversity transceiving system based on folding-out or folding-in terminal |
US12/238,111 Abandoned US20090029747A1 (en) | 2003-12-24 | 2008-09-25 | Foldable mobile terminal with antennas and a selector selecting a diversity transceiving system based on folding-out or folding-in terminal |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US10/932,125 Expired - Fee Related US7444175B2 (en) | 2003-12-24 | 2004-09-02 | Foldable mobile terminal with antennas and a selector selecting a diversity transceiving system based on folding-out or folding-in terminal |
Country Status (2)
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US (2) | US7444175B2 (en) |
JP (1) | JP2005244260A (en) |
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Also Published As
Publication number | Publication date |
---|---|
US20050143151A1 (en) | 2005-06-30 |
US7444175B2 (en) | 2008-10-28 |
JP2005244260A (en) | 2005-09-08 |
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Legal Events
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Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |