WO2008069357A1 - Low noise amplifier for mobile base station - Google Patents
Low noise amplifier for mobile base station Download PDFInfo
- Publication number
- WO2008069357A1 WO2008069357A1 PCT/KR2006/005357 KR2006005357W WO2008069357A1 WO 2008069357 A1 WO2008069357 A1 WO 2008069357A1 KR 2006005357 W KR2006005357 W KR 2006005357W WO 2008069357 A1 WO2008069357 A1 WO 2008069357A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- low noise
- amplifier
- noise amplifier
- repeater
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
Definitions
- the present invention relates to a receiving system of a base station which receives signals of mobile communications such as analog cellular, digital cellular, Code Division Multiple Access (CDMA) cellular, Personal Communication Services (PCS), trunked radio, full-duplex paging, etc., and more particularly to a low noise amplifier for improving receive sensitivity by installing the receiving system near an antenna in order to reduce the total noise figure.
- signals of mobile communications such as analog cellular, digital cellular, Code Division Multiple Access (CDMA) cellular, Personal Communication Services (PCS), trunked radio, full-duplex paging, etc.
- a transmission system of a base station in mobile communication services transfers a signal of great power by using a power amplifier which has great output power and accordingly, the signal can be received even by a handheld terminal of a mobile station located far away from the transmission system of a base station.
- the difference of a communication distance between a downlink and an uplink in communication services requires many more base stations to be installed, and therefore increases the cost of installing and the cost of maintenance and repairs, wherein through a downlink a signal is forwarded from the base station to the mobile station and through an uplink a signal is transferred from the mobile station to the base station.
- transmit-receive sensitivity of a transmission-receiving system of the base station especially, power of an output signal, etc.
- the BPF, the LNA, a down converter, etc. have been located inside a house in the transmission-receiving system of the base station, whereas an antenna has been installed on the rooftop.
- the insertion loss of the cable is several [dB], and accordingly, the loss of the cable is reflected in the noise figure of the overall transmission-receiving system.
- the BPF, the LNA, a down converter, etc. are installed as near to the transmission-receiving antenna as possible, so that the noise figure due to the loss of the cable is reduced.
- the present invention has been made in view of the above- mentioned problems, and it is an object of the present invention to provide a low noise amplifier of a mobile communication base station, which allows equipment installed near a transmission-receiving antenna outside the house to be easily maintained and repaired.
- an amplifier housing with a built-in amplifier circuit device is inserted and equipped from one side of a repeater housing into the repeater housing in a longitudinal direction in a low noise amplifier of a mobile communication base station.
- a low noise amplifier of a mobile communication base station has a main circuit including active elements for amplifying a received signal within a housing, and has a structure to insert and equip the main circuit including the active elements for amplifying the received signal into the housing in the longitudinal direction, and accordingly, it becomes easy to regularly check, maintain, and repair the low noise amplifier, even though the low noise amplifier is installed outside the house. Namely, a worker can easily carry out a regular check, maintenance, and repairs for the active elements of the low noise amplifier with such a simple task that the worker opens an opening of a repeater housing to replace the amplifier housing with another amplifier housing.
- FIG. 1 is a perspective view illustrating a small-sized repeater of a mobile communication base station according to a preferred embodiment of the present invention
- FIG. 2 is a perspective view illustrating an opened state of the opening of a repeater housing illustrated in FIG. 1 ;
- FIG. 3 is a perspective view illustrating a structure in which an amplifier housing is inserted into the repeater housing illustrated in FIG. 2.
- a low noise amplifier of a mobile communication base station including, a repeater housing; and at least one amplifier housing with a built-in low noise amplifier circuit device, which is inserted and equipped from one lateral face of the repeater housing into the repeater housing in a longitudinal direction, will be disclosed.
- a low noise amplifier of mobile communication base station is equipped inside a small-sized repeater 100, and particularly, includes an amplifier housing 102 inserted and equipped into a repeater housing 101 in a longitudinal direction.
- the small-sized repeater 100 has a built-in amplifier housing 102, within which a low noise amplifier for amplifying power of a received signal is equipped.
- ANTenna (ANT) ports 112 for receiving the received signal from an antenna, an input of a signal to be amplified, BTS ports 111, which supplies power source to the low noise amplifier, coupler terminals 113, and ground terminals 115 are installed at one side, and desirably, one side of the lower end of the repeater housing 101.
- the repeater housing 101 has a built-in amplifier housing 102.
- the main circuit including the active elements for amplifying the received signal (e.g., the low noise amplifier, etc., are the core), is installed within the amplifier housing 102.
- the amplifier housing 102 is manufactured in the shape extended in one direction, and is inserted and equipped into the repeater housing 101 in a longitudinal direction.
- an opening 119 is formed at one side of the repeater housing 101.
- the opening 119 is desirably formed at the lower end of the repeater housing 101. Because the opening 119 is formed at the lower end of the repeater housing 101, even though the small-sized repeater 100 is installed in a high place, workers can easily carry out the job for maintenance and repairs.
- the opening 119 is opened or closed by a cover 103 hingedly coupled in the position adjacent to the opening 119. Namely, one end of the cover 103 is hingedly coupled on the outer circumferential surface of the repeater housing 101. In the case when the cover 103 opens the opening 119, the amplifier housing 102 moves along an inner guide rail through the opening 119, and is then inserted into the repeater housing 101, so that the amplifier housing 102 is equipped within the repeater housing 101.
- the other end of the cover 103 is fixed with screws 133 on the outer circumferential surface of the repeater housing 101.
- An elastic member such as sponge, rubber, etc., is adhered to the inner lateral face of the cover 103, and can apply pressure to an end part of the amplifier housing 102 which has been inserted and equipped through the opening 119. As the elastic member applies pressure to the end part of the amplifier housing 102, the amplifier housing 102 is equipped within the repeater housing 101, and is now able to maintain a stable assembly state.
- the opening is formed at the lower end face of the repeater housing, but it will be understood that as environment in which a product or an amplifier housing is installed demands, the opening can be formed at the lateral face, the upper end face, etc., of the repeater housing.
Abstract
Disclosed is a low noise amplifier of a mobile communication base station, which includes a repeater housing, and at least one amplifier housing with a built-in low noise amplifier circuit device. The amplifier housing is inserted and equipped from one lateral face of the repeater housing into the repeater housing in a longitudinal direction. The low noise amplifier of the mobile communication base station has a main circuit including active elements for amplifying a received signal, which is manufactured in the form of a module, and has a structure to insert and equip the main circuit into the housing in the longitudinal direction. Accordingly, it is easy to regularly check, maintain, and repair the low noise amplifier, even though the low noise amplifier is installed outside the house. Namely, a worker can easily carry out a regular check, maintenance, and repairs for the active elements of the low noise amplifier with such a simple task that the worker opens an opening of a repeater housing to replace the amplifier housing with another amplifier housing.
Description
LOW NOISE AMPLIFIER FOR MOBILE BASE STATION
Technical Field
The present invention relates to a receiving system of a base station which receives signals of mobile communications such as analog cellular, digital cellular, Code Division Multiple Access (CDMA) cellular, Personal Communication Services (PCS), trunked radio, full-duplex paging, etc., and more particularly to a low noise amplifier for improving receive sensitivity by installing the receiving system near an antenna in order to reduce the total noise figure.
Background Art
It is usual that a transmission system of a base station in mobile communication services transfers a signal of great power by using a power amplifier which has great output power and accordingly, the signal can be received even by a handheld terminal of a mobile station located far away from the transmission system of a base station.
The difference of a communication distance between a downlink and an uplink in communication services requires many more base stations to be installed, and therefore increases the cost of installing and the cost of maintenance and repairs, wherein through a downlink a signal is forwarded from the base station to the mobile station and through an uplink a signal is transferred from the mobile station to the base station. Hence, when considering transmit-receive sensitivity of a transmission-receiving system of the base station, especially, power of an output signal, etc., as one way to reduce the difference of the communication distance between the downlink and the uplink, efforts to increase the receive sensitivity is redoubled.
In a method for improving the receive sensitivity of the transmission- receiving system of the base station, efforts have been focused on reducing noise figure of a Low Noise Amplifier (LNA) and diminishing insertion loss of a Band- Pass Filter (BPF) or a Duplexer Filter.
However, up to now, the BPF, the LNA, a down converter, etc., have been located inside a house in the transmission-receiving system of the base station, whereas an antenna has been installed on the rooftop. Hereupon, as 10 ~ several tens [meters] of coaxial cable have been connected between the antenna located on the rooftop and the transmission-receiving system of the base
station located inside the house, the insertion loss of the cable is several [dB], and accordingly, the loss of the cable is reflected in the noise figure of the overall transmission-receiving system.
To adopt a method for solving the above problems, the BPF, the LNA, a down converter, etc., are installed as near to the transmission-receiving antenna as possible, so that the noise figure due to the loss of the cable is reduced.
In the case of the equipment consisting of active elements such as amplifiers, when the equipment operates for a long time, other than passive elements, there happen such drawbacks that a failure is caused or the performance is markedly slowed down. Consequently, the equipment consisting of the active elements requires a regular check, maintenance, and repairs.
Still, it is problematic that it is difficult to maintain and repair the LNA, etc., as the LNA, etc., are installed on the rooftop to be located near the antenna. Namely, it is not difficult for workers to maintain and repair the LNA, etc., installed inside the house, whereas, if the LNA, etc., are installed on the rooftop, particularly, when the LNA, etc., are installed near the antenna installed in a higher position on the rooftop, such inconvenience that the workers are compelled to work for a long time in a high place is caused. Moreover, in a case of a conventional LNA, because a second housing of an amplifier unit must be separated from devices inside a first housing after a cover has been separated from the first housing, it becomes even more difficult to maintain and repair the equipment installed outside the house.
Disclosure of the Invention Technical problem
Therefore, the present invention has been made in view of the above- mentioned problems, and it is an object of the present invention to provide a low noise amplifier of a mobile communication base station, which allows equipment installed near a transmission-receiving antenna outside the house to be easily maintained and repaired.
Technical Solution
According to an aspect of the present invention, there is provided a structure in which an amplifier housing with a built-in amplifier circuit device is inserted and equipped from one side of a repeater housing into the repeater housing in a longitudinal direction in a low noise amplifier of a mobile communication base station.
Advantageous Effects
A low noise amplifier of a mobile communication base station according to the present invention has a main circuit including active elements for amplifying a received signal within a housing, and has a structure to insert and equip the main circuit including the active elements for amplifying the received signal into the housing in the longitudinal direction, and accordingly, it becomes easy to regularly check, maintain, and repair the low noise amplifier, even though the low noise amplifier is installed outside the house. Namely, a worker can easily carry out a regular check, maintenance, and repairs for the active elements of the low noise amplifier with such a simple task that the worker opens an opening of a repeater housing to replace the amplifier housing with another amplifier housing.
Brief Description of the Drawings
The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:
FIG. 1 is a perspective view illustrating a small-sized repeater of a mobile communication base station according to a preferred embodiment of the present invention;
FIG. 2 is a perspective view illustrating an opened state of the opening of a repeater housing illustrated in FIG. 1 ; and
FIG. 3 is a perspective view illustrating a structure in which an amplifier housing is inserted into the repeater housing illustrated in FIG. 2.
Best Mode for Carrying Out the Invention
Reference will now be made in detail to the preferred embodiments of
- A -
the present invention.
A low noise amplifier of a mobile communication base station including, a repeater housing; and at least one amplifier housing with a built-in low noise amplifier circuit device, which is inserted and equipped from one lateral face of the repeater housing into the repeater housing in a longitudinal direction, will be disclosed.
Mode for Invention
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.
As illustrated in FIGS. 1 to 3, a low noise amplifier of mobile communication base station according to a preferred embodiment of the present invention, is equipped inside a small-sized repeater 100, and particularly, includes an amplifier housing 102 inserted and equipped into a repeater housing 101 in a longitudinal direction.
The small-sized repeater 100 has a built-in amplifier housing 102, within which a low noise amplifier for amplifying power of a received signal is equipped. ANTenna (ANT) ports 112 for receiving the received signal from an antenna, an input of a signal to be amplified, BTS ports 111, which supplies power source to the low noise amplifier, coupler terminals 113, and ground terminals 115 are installed at one side, and desirably, one side of the lower end of the repeater housing 101.
The repeater housing 101 has a built-in amplifier housing 102. The main circuit, including the active elements for amplifying the received signal (e.g., the low noise amplifier, etc., are the core), is installed within the amplifier housing 102. The amplifier housing 102 is manufactured in the shape extended in one direction, and is inserted and equipped into the repeater housing 101 in a longitudinal direction.
In order to insert and equip the amplifier housing 102, an opening 119 is formed at one side of the repeater housing 101. When the small-sized repeater 100 installed near the antenna outside the house is considered, the opening 119 is desirably formed at the lower end of the repeater housing 101.
Because the opening 119 is formed at the lower end of the repeater housing 101, even though the small-sized repeater 100 is installed in a high place, workers can easily carry out the job for maintenance and repairs. The opening 119 is opened or closed by a cover 103 hingedly coupled in the position adjacent to the opening 119. Namely, one end of the cover 103 is hingedly coupled on the outer circumferential surface of the repeater housing 101. In the case when the cover 103 opens the opening 119, the amplifier housing 102 moves along an inner guide rail through the opening 119, and is then inserted into the repeater housing 101, so that the amplifier housing 102 is equipped within the repeater housing 101.
To stop the cover 103 from accidentally opening, in a state where the cover 103 keeps the opening 119 airtight, the other end of the cover 103 is fixed with screws 133 on the outer circumferential surface of the repeater housing 101. An elastic member such as sponge, rubber, etc., is adhered to the inner lateral face of the cover 103, and can apply pressure to an end part of the amplifier housing 102 which has been inserted and equipped through the opening 119. As the elastic member applies pressure to the end part of the amplifier housing 102, the amplifier housing 102 is equipped within the repeater housing 101, and is now able to maintain a stable assembly state. While the invention has been shown and described with reference to a certain preferred embodiment thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Therefore, the spirit and scope of the present invention must be defined not by described embodiments thereof but by the appended claims and equivalents of the appended claims.
For example, in a preferred embodiment of the present invention, the opening is formed at the lower end face of the repeater housing, but it will be understood that as environment in which a product or an amplifier housing is installed demands, the opening can be formed at the lateral face, the upper end face, etc., of the repeater housing.
Claims
1. A low noise amplifier of a mobile communication base station comprising: a repeater housing; and at least one amplifier housing with a built-in low noise amplifier circuit device, which is inserted and equipped from one lateral face of the repeater housing into the repeater housing in a longitudinal direction.
2. The low noise amplifier as claimed in claim 1, further comprising: an opening formed on one lateral face of the repeater housing; and a cover for opening/closing the opening, hingedly coupled at one side of the opening.
3. The low noise amplifier as claimed in claim 2, wherein the cover is fixed with screws on the outer circumferential surface of the repeater housing in a state where the cover keeps the opening airtight.
4. The low noise amplifier as claimed in claim 2, which further comprises at least one elastic member adhered to the inner lateral face of the cover, applying pressure to one end of the amplifier housing.
5. The low noise amplifier as claimed in claim 1, wherein one lateral face into which the amplifier housing is inserted corresponds to the lower end face of the repeater housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/KR2006/005357 WO2008069357A1 (en) | 2006-12-08 | 2006-12-08 | Low noise amplifier for mobile base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/KR2006/005357 WO2008069357A1 (en) | 2006-12-08 | 2006-12-08 | Low noise amplifier for mobile base station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008069357A1 true WO2008069357A1 (en) | 2008-06-12 |
Family
ID=39492226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2006/005357 WO2008069357A1 (en) | 2006-12-08 | 2006-12-08 | Low noise amplifier for mobile base station |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2008069357A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR970055837A (en) * | 1995-12-29 | 1997-07-31 | 이우복 | Wireless repeater |
| US6125109A (en) * | 1998-02-24 | 2000-09-26 | Repeater Technologies | Delay combiner system for CDMA repeaters and low noise amplifiers |
| KR20010097108A (en) * | 2000-04-20 | 2001-11-08 | 박종섭 | Apparatus for relaying in mobile communication system |
| KR20060128107A (en) * | 2005-06-08 | 2006-12-14 | 주식회사 케이엠더블유 | Low noise amplifier for mobile base station |
-
2006
- 2006-12-08 WO PCT/KR2006/005357 patent/WO2008069357A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR970055837A (en) * | 1995-12-29 | 1997-07-31 | 이우복 | Wireless repeater |
| US6125109A (en) * | 1998-02-24 | 2000-09-26 | Repeater Technologies | Delay combiner system for CDMA repeaters and low noise amplifiers |
| KR20010097108A (en) * | 2000-04-20 | 2001-11-08 | 박종섭 | Apparatus for relaying in mobile communication system |
| KR20060128107A (en) * | 2005-06-08 | 2006-12-14 | 주식회사 케이엠더블유 | Low noise amplifier for mobile base station |
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