WO2000070745A1 - Single sideband mixer - Google Patents
Single sideband mixer Download PDFInfo
- Publication number
- WO2000070745A1 WO2000070745A1 PCT/IB2000/000839 IB0000839W WO0070745A1 WO 2000070745 A1 WO2000070745 A1 WO 2000070745A1 IB 0000839 W IB0000839 W IB 0000839W WO 0070745 A1 WO0070745 A1 WO 0070745A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- signals
- sideband mixer
- single sideband
- mixer
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/52—Modulators in which carrier or one sideband is wholly or partially suppressed
Definitions
- the invention relates to a single sideband mixer for high-frequency signals.
- such mixers are used to generate a low-frequency signal (intermediate frequency, IF) from a higher-frequency signal (radio frequency, RF) (down-mixer or demodulator) or to produce a higher-frequency signal from a low-frequency signal
- Upward mixer or modulator Upward mixer or modulator
- mixing the RF signal with the LO signal results in the IF signal.
- mixing the IF signal with the LO signal results in the RF signal.
- a simple multiplication of an input signal (RF or IF) with the LO signal provides output signals with two sidebands that are shifted into the intermediate or radio frequency range.
- a single sideband mixer produces only one of these two sidebands in the output signal. It is created by suitably connecting two individual double-sided belt mixers, hereinafter simply referred to as mixers. Their function can be as a Multiplication of their two input signals can be understood.
- Single-sideband mixers for high-frequency signals are known, the two mixers, which are each connected with identical first signals and with second signals phase-shifted by 90 ° with respect to one another in order to form a product signal from the two signals, and an adder for superimposing the two product signals to include an output signal with only one sideband.
- a typical demodulator of this type is shown in FIG.
- the RF signal is fed from an input 4 to two mixers 3 via one or more amplifiers 1 and a 0 ° power divider, for example a so-called Wilkinson divider.
- a 90 ° coupler 6 connected to a local oscillator input 5 supplies local oscillator signals which are phase-shifted by 90 ° to each other to corresponding inputs of the mixer 3.
- intermediate frequency signals with 90 ° phase shift with respect to one another at the outputs of the mixers, each with both side bands .
- These are referred to as in-phase (IF / I) or quadrature phase signals (IF / Q).
- IF / I in-phase
- IF / Q quadrature phase signals
- Local oscillator signals to the two mixers are superimposed on the two side bands of the in-phase branch and the quadrature branch behind the second 90 ° coupler 7, one in phase and the other in opposite phase.
- Two output signals, each containing only one of the two sidebands, are thus obtained at the two output connections of the second 90 ° coupler 7.
- One of these connections forms an output connection 8 of the single sideband mixer; the other output is terminated with the characteristic impedance in order to suppress interference signals and noise at the location of the undesired side band (image frequency).
- the power divider 2 of this conventional single-sideband mixer is required in order to decouple the in-phase branch and the quadrature branch of the single-sideband mixer, that is to say to prevent the two mixers 3 from influencing one another via their RF inputs.
- Such a power divider 2 comprises coupled lines with a length of ⁇ / 4, where ⁇ is the wavelength of the radio frequency in the lines. For technically relevant frequencies, this length corresponds to at least 1 mm.
- the power divider is now in the Compared to other components of the circuit, a very extensive part, which is poorly suited for integration on a common semiconductor substrate together with amplifiers, mixers or other components of the single sideband mixer for cost reasons.
- the invention creates a single-sideband mixer for high-frequency signals of the type defined in the introduction, which is well suited for complete integration on a semiconductor substrate.
- This advantage is achieved in that each mixer is preceded by an amplifier and that these amplifiers have a forked one Line with inputs connected to the same signal source.
- the bulky power divider can be omitted in this circuit topology, since the amplifiers already ensure sufficient decoupling of the two branches of the single-sideband mixer by blocking interference signals emitted by the mixers on their input line.
- the signal source from which the amplifiers receive their input signal can be a common preamplifier connected to an input.
- the first signal is preferably an RF signal and the second signal is an LO signal, and a first 90 ° coupler for generating the second signals is connected to an LO input of the single-sideband mixer.
- the signal source can also be a signal input of the single sideband mixer.
- the first signal can be an LO signal and the second signal can be an IF signal, and a first 90 ° coupler for generating the second signals is connected to an IF input of the sideband mixer.
- Figure 1 shows a down mixer as the first embodiment of the invention
- Figure 2 shows an upward mixer as the second
- the down mixer shown in Figure 1 is made entirely on a semiconductor substrate
- Integrated gallium arsenide It includes one to one
- Radio frequency (RF) input 4 connected to Radio frequency (RF) input 4 connected to Radio frequency (RF) input 4 connected to Radio frequency (RF) input 4 connected to Radio frequency (RF) input 4 connected to Radio frequency (RF) input 4 connected to Radio frequency (RF) input 4 connected to Radio frequency (RF) input 4 connected to Radio frequency (RF) input 4 connected to Radio frequency (RF) input 4 connected to Radio frequency (RF) input 4 connected to Radio frequency (RF) input 4 connected to Radio frequency (RF) input 4 connected
- Preamplifier 9 the output of which is connected via a simple bifurcated line 11 to two amplifiers 1, each of which belongs to an in-phase and a quadrature branch of the single-sideband mixer.
- These amplifiers 1 are based on fast field-effect transistors, the space requirement of which is considerably smaller on a semiconductor substrate with approximately 100 ⁇ 200 ⁇ m than that of one
- Preamplifiers are integrated on a common substrate, there are no bond connections, so that the line lengths between the preamplifier 9 and the amplifiers 1, on the one hand, and between the amplifiers 1 and the mixers 3 connected to their outputs, can be specified with a manufacturing precision with a precision of a few micrometers. Therefore, although the in-phase and quadrature branches of the single-sideband mixer each contain one component more than in the conventional single-sideband mixer, it is easier in the single-sideband mixer according to FIG. 1 to maintain a desired phase relationship between the signals on the two branches during manufacture.
- the mixers 3 connected to the outputs of the amplifiers 1 also have an input for a local oscillator signal, which they receive, each phase-shifted by 90 °, from a 90 ° phase coupler 6, to which the local oscillator signal is in turn fed from the outside via an input 5.
- a second input of the coupler 6 is terminated with the characteristic impedance.
- the two mixers 3 each deliver an in-phase or quadrature intermediate frequency signal to inputs of a second 90 ° coupler 7, of which one output is the intermediate frequency output of the Single sideband mixer forms, and a second output with the characteristic impedance is completed.
- the 90 ° couplers 6 and 7 can each be integrated as hybrid elements on the gallium arsenide substrate.
- Figure 2 shows the application of the principle of the present invention to an up mixer.
- This single-sideband mixer is also integrated on a uniform semiconductor substrate.
- the inputs of two amplifiers 1 are connected via a simple forked line 11 to an input 5 for a local oscillator signal.
- the intermediate frequency signal to be mixed with the local oscillator is fed from an input 4 via a 90 ° coupler 6 to the two mixers 4, each phase-shifted by 90 °. From this, the two mixers 3 generate radio frequency signals with two sidebands. These radio frequency signals with two sidebands are in turn fed to a 90 ° mixer 7, which superimposes them into two radio frequency signals with one sideband each, which are output at outputs 8A, 8B.
- the use of the two amplifiers 1 makes it possible to dispense with a power divider and thus to integrate the entire single-sideband mixer on a uniform semiconductor substrate.
- the linearity of the RF path at the mixer outputs is improved by additional amplifiers 10 in front of the 90 ° coupler 7.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00935443A EP1183775A1 (en) | 1999-05-12 | 2000-05-12 | Single sideband mixer |
AU50982/00A AU5098200A (en) | 1999-05-12 | 2000-05-12 | Single sideband mixer |
NO20015453A NO20015453D0 (en) | 1999-05-12 | 2001-11-07 | Single Sideband Mixer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19921921.4 | 1999-05-12 | ||
DE1999121921 DE19921921A1 (en) | 1999-05-12 | 1999-05-12 | Single-sided band mixer for HF signals has amplifier connected before each mixer to produce first signal; amplifiers have inputs connected via branched line to common signal source |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000070745A1 true WO2000070745A1 (en) | 2000-11-23 |
Family
ID=7907848
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2000/000839 WO2000070745A1 (en) | 1999-05-12 | 2000-05-12 | Single sideband mixer |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1183775A1 (en) |
CN (1) | CN1360752A (en) |
AU (1) | AU5098200A (en) |
DE (1) | DE19921921A1 (en) |
NO (1) | NO20015453D0 (en) |
WO (1) | WO2000070745A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7640002B2 (en) * | 2006-09-14 | 2009-12-29 | Infineon Technologies Ag | RF amplifier |
JP5494252B2 (en) * | 2009-09-11 | 2014-05-14 | ソニー株式会社 | Synchronous oscillator, clock recovery device, clock distribution circuit, and multimode injection circuit |
EP3673286B1 (en) * | 2017-08-24 | 2021-03-24 | Telefonaktiebolaget LM Ericsson (publ) | An integrated wireless communication and radar system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2078038A (en) * | 1980-06-02 | 1981-12-23 | Gen Electric Co Ltd | Superheterodyne receivers |
US4457022A (en) * | 1982-04-28 | 1984-06-26 | Motorola Inc. | Two diode image rejection and pseudo-image enhancement mixer |
US4470147A (en) * | 1981-09-15 | 1984-09-04 | International Standard Electric Corporation | Radio receiver with quadrature demodulation and digital processing |
FR2741764A1 (en) * | 1995-11-23 | 1997-05-30 | Thomson Csf | METHOD AND DEVICE FOR REMOVAL OF SIGNAL RESIDUES IN QUADRATURE SIGNAL MODULATORS-DEMODULATORS |
-
1999
- 1999-05-12 DE DE1999121921 patent/DE19921921A1/en not_active Withdrawn
-
2000
- 2000-05-12 CN CN 00810317 patent/CN1360752A/en active Pending
- 2000-05-12 WO PCT/IB2000/000839 patent/WO2000070745A1/en not_active Application Discontinuation
- 2000-05-12 EP EP00935443A patent/EP1183775A1/en not_active Withdrawn
- 2000-05-12 AU AU50982/00A patent/AU5098200A/en not_active Abandoned
-
2001
- 2001-11-07 NO NO20015453A patent/NO20015453D0/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2078038A (en) * | 1980-06-02 | 1981-12-23 | Gen Electric Co Ltd | Superheterodyne receivers |
US4470147A (en) * | 1981-09-15 | 1984-09-04 | International Standard Electric Corporation | Radio receiver with quadrature demodulation and digital processing |
US4457022A (en) * | 1982-04-28 | 1984-06-26 | Motorola Inc. | Two diode image rejection and pseudo-image enhancement mixer |
FR2741764A1 (en) * | 1995-11-23 | 1997-05-30 | Thomson Csf | METHOD AND DEVICE FOR REMOVAL OF SIGNAL RESIDUES IN QUADRATURE SIGNAL MODULATORS-DEMODULATORS |
Non-Patent Citations (1)
Title |
---|
CAMPBELL R L: "AN EXPERIMENTAL 5.7 GHZ SSB COMMUNICATIONS SYSTEM", IEEE ANTENNAS AND PROPAGATION MAGAZINE,US,IEEE INC, NEW YORK, vol. 38, no. 1, 1 February 1996 (1996-02-01), pages 81 - 84, XP000581498, ISSN: 1045-9243 * |
Also Published As
Publication number | Publication date |
---|---|
DE19921921A1 (en) | 2000-11-16 |
EP1183775A1 (en) | 2002-03-06 |
CN1360752A (en) | 2002-07-24 |
AU5098200A (en) | 2000-12-05 |
NO20015453L (en) | 2001-11-07 |
NO20015453D0 (en) | 2001-11-07 |
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