CN114650015A - Multi-channel radio frequency receiving device and multi-channel down-conversion assembly - Google Patents
Multi-channel radio frequency receiving device and multi-channel down-conversion assembly Download PDFInfo
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- CN114650015A CN114650015A CN202210183263.5A CN202210183263A CN114650015A CN 114650015 A CN114650015 A CN 114650015A CN 202210183263 A CN202210183263 A CN 202210183263A CN 114650015 A CN114650015 A CN 114650015A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
- H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/099—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
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Abstract
The invention discloses a multichannel radio frequency receiving device and a multichannel down-conversion assembly, wherein each channel of the multichannel radio frequency receiving device comprises a K/S frequency conversion module and an S/P module, and the K/S frequency conversion module comprises an amplitude limiter, a first amplifier, a first band-pass filter, a first frequency mixer and a second band-pass filter which are sequentially connected; the S/P module comprises a second amplifier, a first phase compensator, a second mixer, a low-pass filter, a third amplifier, a numerical control attenuator, a second phase compensator and a third band-pass filter which are connected in sequence; the input of the second amplifier is the output of the second band-pass filter. Compared with the traditional multi-channel design, the invention greatly ensures the amplitude-phase consistency of multi-channel local oscillation signals by adopting the design that the local oscillation signals enter the 0-degree power divider after being moved, and the amplitude-phase consistency between multiple channels is greatly improved by adding the numerical control attenuator and the phase compensation network in the receiving channel of the secondary frequency conversion.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a K-band secondary frequency conversion multi-channel down-conversion component.
Background
The multichannel down-conversion component is an indispensable part in a digital phased array system, the performance of the multichannel down-conversion component has important influence on the phased array system, the main function of the multichannel down-conversion component is to realize frequency conversion, convert high-frequency signals into low-intermediate-frequency signals through frequency conversion, complete the transmission and receiving functions of the signals after filtering and amplification, and is a link between signal transmission and processing.
The technical scheme includes that the device comprises a box body, a local oscillator power dividing circuit, a first-stage amplifier, four second-stage amplifiers and four frequency conversion channels, a local oscillator power dividing and amplifying network is fixed on the back of the box body, the first-stage amplifier, the four second-stage amplifiers and the four frequency conversion channels are fixed on the front of the box body, the frequency conversion channels on the front and the local oscillator power dividing circuit on the back are interconnected through radio frequency insulators, local oscillator signals are amplified by the first-stage amplifiers, input local oscillator power dividing circuits are divided into 4 paths, and the 4 paths of local oscillator signals are correspondingly input into the 4 frequency conversion channels after being amplified by the second-stage amplifiers.
The above patent has the problems of low working frequency band, short link, less channel number and difficult adjustment of the consistent amplitude between channels.
Disclosure of Invention
The invention provides a multi-channel radio frequency receiving device and a multi-channel down-conversion component, aiming at the problems of few channels, more stray, high technical difficulty, poor reliability, difficulty in guaranteeing amplitude-phase consistency precision among receiving channels and the like of the existing multi-channel down-conversion component working at a higher frequency band.
The invention adopts the following technical scheme:
the invention provides a multichannel radio frequency receiving device, wherein each channel comprises a K/S frequency conversion module and an S/P module, and the multichannel radio frequency receiving device is characterized in that the K/S frequency conversion module comprises an amplitude limiter, a first amplifier, a first band-pass filter, a first frequency mixer and a second band-pass filter which are connected in sequence; the S/P module comprises a second amplifier, a first phase compensator, a second mixer, a low-pass filter, a third amplifier, a numerical control attenuator, a second phase compensator and a third band-pass filter which are connected in sequence; the input of the second amplifier is the output of the second band-pass filter; and a first local oscillation signal is accessed to the first frequency mixer, and a second local oscillation signal is accessed to the second frequency mixer.
The invention also provides a multi-channel down-conversion component, which is characterized in that: the system comprises a secondary power supply and control module, a multi-channel K/S frequency conversion module, a multi-channel S/P module, a first local oscillator module, a clock module, a second local oscillator module, a first local oscillator driving and power dividing module and a second local oscillator driving and power dividing module; the output of the clock module is connected with the input of the first local oscillation module and the input of the second local oscillation module; the output of the first local oscillator module is connected with the input end of the first local oscillator driving and power dividing module, and the output of the second local oscillator module is connected with the input end of the second local oscillator driving and power dividing module; the multi-path constant-amplitude in-phase first local oscillation signals output by the first local oscillation driving and power dividing module are input to a local oscillation signal input end of the multi-channel K/S frequency conversion module; the multi-path constant-amplitude in-phase second local oscillation signals output by the second local oscillation driving and power dividing module are input to a local oscillation signal input end of the multi-channel S/P frequency conversion module; each channel of the multi-channel K/S frequency conversion module comprises an amplitude limiter, a first amplifier, a first band-pass filter, a first frequency mixer and a second band-pass filter which are connected in sequence; each channel of the multi-channel S/P module comprises a second amplifier, a first phase compensator, a second mixer, a low-pass filter, a third amplifier, a numerical control attenuator, a second phase compensator and a third band-pass filter which are connected in sequence; the input of the second amplifier is the output of the second band-pass filter; and the first mixer is accessed with a first local oscillation signal output by a first local oscillation driving and power dividing module, and the second mixer is accessed with a second local oscillation signal output by a second local oscillation driving and power dividing module.
The integral structure of the down-conversion component is divided into an upper layer and a lower layer, wherein the upper layer comprises a secondary power supply and control module, a multi-channel K/S frequency conversion module and a multi-channel S/P module; the lower layer comprises a first local oscillator module, a clock module, a second local oscillator module, a first local oscillator drive and power division module and a second local oscillator drive and power division module.
The first local oscillator module, the second local oscillator module and each receiving channel of the invention are provided with working level and serial control signals by a power supply and control module. Each path of radio frequency receiving channel can independently complete the functions of low noise amplification, frequency conversion, filtering, gain control, phase compensation, intermediate frequency amplification and the like of echo signals.
The first local oscillation signal and the second local oscillation signal required by the two frequency conversions are generated by the corresponding local oscillation modules firstly and then driven, then enter the 0-degree, 1-division multi-path microstrip line power divider, and then are vertically transited to the upper-layer radio frequency channel through the glass insulator, so that the amplitude and phase of the multi-path local oscillation signals can be ensured to be consistent.
First local oscillator module includes decimal frequency division phase-locked loop, active loop filter, voltage controlled oscillator, first band pass filter, multiplier, second band pass filter, tunes broadband high voltage controlled oscillator with active loop filter, and through the frequency doubling filter, first local oscillator module can produce the first local oscillator signal of K wave band of high frequency resolution, low spurious, low phase noise.
The adoption of a numerical control attenuator in the S/P frequency conversion module is a numerical control attenuator with 7-bit stepping of 0.25dB, so that the gain of each channel can be adjusted, and the amplitude of each channel can be ensured to be consistent; the manual phase compensation network in the S/P frequency conversion module is a long section of microstrip line of a resistance welding windowing, and the phase of an output signal is adjusted by loading a good conductor with certain thickness and length on the microstrip line; better amplitude-phase consistency level among channels can be obtained by adjusting the attenuation value of the numerical control attenuator and loading good conductors with different thicknesses and lengths on the microstrip line.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a functional diagram of the upper layer of the present invention;
FIG. 2 is a functional diagram of the lower layer of the present invention;
FIG. 3 is a functional block diagram of a first local oscillation module;
fig. 4 is a functional block diagram of a single-channel rf receive channel.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
In this embodiment, a multi-channel rf receiving apparatus is provided, where the number of channels is 4, 8, 16, and so on, and as shown in fig. 4, each channel includes a K/S frequency conversion module and an S/P module. The K/S frequency conversion module comprises an amplitude limiter, a low noise amplifier, a third band-pass filter, a first frequency mixer and a fourth band-pass filter which are connected in sequence; the S/P module comprises a first intermediate frequency amplifier, a first phase compensation network, a second mixer, a low-pass filter, a second intermediate frequency amplifier, a numerical control attenuator, a second phase compensation network and a fifth band-pass filter which are connected in sequence; the input of the first intermediate frequency amplifier is the output of the fourth band-pass filter; the first mixer is accessed with a first local oscillation signal, and the second mixer is accessed with a second local oscillation signal.
In one embodiment, the first phase compensation network and the second phase compensation network adopt microstrip lines, and good conductors with different thicknesses and lengths are loaded on the microstrip lines to realize coarse adjustment and fine adjustment of phase compensation.
In one embodiment, the digitally controlled attenuator is a 7-bit digitally controlled attenuator stepped by 0.25 dB. The first phase compensation network is used for coarse phase compensation adjustment, the second phase compensation network is used for fine phase compensation adjustment, after amplitude data of each channel are obtained, the numerical control attenuators of the channels are modified, and high-precision multi-channel amplitude consistency can be achieved; after phase difference data of each channel is obtained, good conductors with different thicknesses and lengths are loaded on the phase compensation network through calculation and simulation, and high-precision multichannel phase consistency can be achieved.
The present embodiment provides a multi-channel down-conversion module, as shown in fig. 1 to 4, the multi-channel down-conversion module of the present invention is a K-band secondary frequency conversion multi-channel down-conversion module, and has an upper layer and a lower layer in an overall structure, where the upper layer includes a secondary power supply and control module 1, a multi-channel K/S frequency conversion module 2, and a multi-channel S/P module 3; the lower layer comprises a first local oscillator module 4, a clock module 5, a second local oscillator module 6, a first local oscillator drive and power division module 7 and a second local oscillator drive and power division module 8. The first local oscillator module, the second local oscillator module and each receiving channel are uniformly provided with a working level and a serial control signal by the power supply and control module. Each path of radio frequency receiving channel can independently complete the functions of low noise amplification, frequency conversion, filtering, gain control, phase compensation, intermediate frequency amplification and the like of echo signals.
The first local oscillation module 4 needs to generate a K-band local oscillation signal with higher frequency and better phase noise performance, and a functional block diagram of the unit is shown in fig. 3. The second local oscillation module 6 needs to generate an S-band local oscillation signal with higher frequency and better phase noise performance.
A design method of a K-band secondary frequency conversion multi-channel down-conversion component and an action relation of a component working process are as follows:
s1: the secondary power supply and control module 1 converts the primary power supply provided by the receiver to the frequency conversion assembly into the secondary power supply required by the operation of each module of the assembly, and provides required serial control signals for the local oscillation module and the frequency conversion channel.
S2: after the clock module 5 is powered on, the temperature compensated crystal oscillator generates the reference input clocks required by the first local oscillator module 4 and the second local oscillator module 6.
S3: the first local oscillation module 4 and the second local oscillation module 6 generate local oscillation signals of corresponding frequency bands after being powered on and receiving corresponding serial control signals, and then the local oscillation signals are input to corresponding local oscillation driving and power dividing modules (7 and 8). The first local oscillation module 4 needs to generate a K-band local oscillation signal with higher frequency and better phase noise performance, and a functional block diagram of the unit is shown in fig. 3.
S4: the first local oscillator driving and power dividing module 7 and the second local oscillator driving and power dividing module 8 perform power amplification and filtering on local oscillator signals of the first local oscillator module and the second local oscillator module, and then the local oscillator signals enter the microstrip line power divider to generate a plurality of paths of first local oscillator signals and second local oscillator signals with the same amplitude.
S5: after being powered on, the multichannel K/S frequency conversion module 2 and the multichannel S/P module 3 are driven by a plurality of paths of first local oscillation signals and a plurality of paths of second local oscillation signals, and can convert input K-waveband radio-frequency signals into first intermediate-frequency signals of an S waveband first in a down-conversion mode and then convert the signals into second intermediate-frequency output signals of a P waveband in the down-conversion mode. And a proper band-pass filter is selected for better intermediate frequency planning, so that stray and mirror frequency can be well suppressed.
S6: after the amplitude-phase consistency of a multi-channel output P-band signal is measured, as shown in a functional block diagram of a single-channel down-conversion component shown in fig. 4, the single-channel down-conversion component comprises a 7-bit digital controlled attenuator with step 0.25dB and two manual phase compensation networks, a phase compensation 1 can be used for coarse phase compensation, a phase compensation 2 can be used for fine phase compensation, and after amplitude data of each channel is obtained, the high-precision multi-channel amplitude consistency can be realized by modifying the digital controlled attenuator of each channel; after phase difference data of each channel is obtained, good conductors with different thicknesses and lengths are loaded on the phase compensation network through calculation and simulation, and high-precision multichannel phase consistency can be achieved.
The K-waveband secondary frequency conversion multi-channel down-conversion component can realize low-noise amplification, stray suppression, gain adjustment and low-intermediate frequency output of multi-channel K-waveband radio-frequency signals of 4 channels, 8 channels, 16 channels and the like; through the numerical control attenuator of the radio frequency receiving channel and the coarse and fine phase compensation networks, the high-precision multi-channel output amplitude-phase consistency performance can be realized, and a hardware basis is provided for a high-resolution and high-measurement-precision receiver.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A multi-channel radio frequency receiving device is characterized in that each channel comprises a K/S frequency conversion module and an S/P module, and the K/S frequency conversion module comprises an amplitude limiter, a first amplifier, a third band-pass filter, a first frequency mixer and a fourth band-pass filter which are connected in sequence; the S/P module comprises a second amplifier, a first phase compensator, a second mixer, a low-pass filter, a third amplifier, a numerical control attenuator, a second phase compensator and a fifth band-pass filter which are connected in sequence; the input of the second amplifier is the output of the third band-pass filter; and a first local oscillation signal is accessed to the first frequency mixer, and a second local oscillation signal is accessed to the second frequency mixer.
2. The multi-channel radio frequency receiving device according to claim 1, wherein the first phase compensator is a phase compensation network, and coarse phase compensation adjustment is realized by loading good conductors with different thicknesses and lengths on the phase compensation network.
3. The multi-channel radio frequency receiving device according to claim 1, wherein the second phase compensator is a phase compensation network, and fine adjustment of phase compensation is realized by loading good conductors with different thicknesses and lengths on the phase compensation network.
4. A multi-channel rf receiving device according to claim 2 or 3, wherein the phase compensation network is a microstrip line.
5. The multi-channel radio frequency receiving device according to claim 4, wherein the first amplifier is a low noise amplifier; the second amplifier is a first intermediate frequency amplifier; the third amplifier is a second intermediate frequency amplifier.
6. The multi-channel RF receiving device of claim 4, wherein the digitally controlled attenuator is a digitally controlled attenuator stepped by 0.25 dB.
7. A multi-channel down conversion module, comprising: the system comprises a secondary power supply and control module (1), a multi-channel K/S frequency conversion module (2), a multi-channel S/P module (3), a first local oscillator module (4), a clock module (5), a second local oscillator module (6), a first local oscillator driving and power dividing module (7) and a second local oscillator driving and power dividing module (8); the output of the clock module (5) is connected with the input of the first local oscillation module (4) and the input of the second local oscillation module (6); the output of the first local oscillator module (4) is connected with the input end of the first local oscillator drive and power distribution module (7), and the output of the second local oscillator module (6) is connected with the input end of the second local oscillator drive and power distribution module (8); the multi-path constant-amplitude in-phase first local oscillation signals output by the first local oscillation driving and power dividing module (7) are input to a local oscillation signal input end of the multi-channel K/S frequency conversion module (2); the multi-path constant-amplitude in-phase second local oscillation signals output by the second local oscillation driving and power dividing module (8) are input to a local oscillation signal input end of the multi-channel S/P frequency conversion module (3); each channel of the multi-channel K/S frequency conversion module (2) comprises an amplitude limiter, a first amplifier, a third band-pass filter, a first mixer and a fourth band-pass filter which are connected in sequence; each channel of the multi-channel S/P module (3) comprises a second amplifier, a first phase compensator, a second mixer, a low-pass filter, a third amplifier, a numerical control attenuator, a second phase compensator and a fifth band-pass filter which are connected in sequence; the input of the second amplifier is the output of the fourth band-pass filter; and the first mixer is accessed with a first local oscillation signal output by a first local oscillation driving and power dividing module (7), and the second mixer is accessed with a second local oscillation signal output by a second local oscillation driving and power dividing module (8).
8. The multi-channel down conversion assembly of claim 7, wherein: the integral structure of the down-conversion component is divided into an upper layer and a lower layer, wherein the upper layer comprises a secondary power supply and control module (1), a multi-channel K/S frequency conversion module (2) and a multi-channel S/P module (3); the lower layer comprises a first local oscillator module (4), a clock module (5), a second local oscillator module (6), a first local oscillator drive and power division module (7) and a second local oscillator drive and power division module (8).
9. The multi-channel down conversion assembly of claim 7, wherein: the first local oscillator driving and power dividing module (7) comprises a K-waveband local oscillator driving amplifier, a K-waveband band-pass filter and a K-waveband 0-degree multi-path power divider; the input K-waveband local oscillation signal is driven and amplified by a K-waveband local oscillation driving amplifier and then enters a K-waveband band-pass filter to filter harmonic components, the harmonic components are then used as input of a K-waveband 0-degree multi-path power divider, and the K-waveband 0-degree multi-path power divider finally outputs a plurality of paths of first local oscillation signals with equal amplitude and same phase.
10. The multi-channel down conversion assembly of claim 7, wherein: the second local oscillator driving and power dividing module (8) comprises an S-band local oscillator driving amplifier, an S-band-pass filter and an S-band 0-degree multi-path power divider; the input S-band local oscillation signal is driven and amplified by an S-band local oscillation driving amplifier, enters an S-band-pass filter to filter harmonic components, is then used as the input of an S-band 0-degree multi-path power divider, and finally outputs a plurality of paths of first local oscillation signals with equal amplitude and same phase.
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| CN202210183263.5A CN114650015A (en) | 2022-02-28 | 2022-02-28 | Multi-channel radio frequency receiving device and multi-channel down-conversion assembly |
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| CN202210183263.5A CN114650015A (en) | 2022-02-28 | 2022-02-28 | Multi-channel radio frequency receiving device and multi-channel down-conversion assembly |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115065376A (en) * | 2022-07-27 | 2022-09-16 | 成都雷通科技有限公司 | Eight-channel high-power frequency conversion TR component |
| CN115277341A (en) * | 2022-08-04 | 2022-11-01 | 北京中科睿信科技有限公司 | Multichannel broadband intermediate-frequency signal amplitude-phase control system and control method thereof |
| CN117792411A (en) * | 2023-11-01 | 2024-03-29 | 北京大学深圳研究生院 | Multichannel transmitting and receiving front-end module for ultra-high field magnetic resonance imaging |
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2022
- 2022-02-28 CN CN202210183263.5A patent/CN114650015A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115065376A (en) * | 2022-07-27 | 2022-09-16 | 成都雷通科技有限公司 | Eight-channel high-power frequency conversion TR component |
| CN115065376B (en) * | 2022-07-27 | 2022-11-25 | 成都雷通科技有限公司 | Eight-channel high-power frequency conversion TR (transmitter-receiver) assembly |
| CN115277341A (en) * | 2022-08-04 | 2022-11-01 | 北京中科睿信科技有限公司 | Multichannel broadband intermediate-frequency signal amplitude-phase control system and control method thereof |
| CN115277341B (en) * | 2022-08-04 | 2023-05-12 | 北京中科睿信科技有限公司 | Multichannel broadband intermediate frequency signal amplitude and phase control system and control method thereof |
| CN117792411A (en) * | 2023-11-01 | 2024-03-29 | 北京大学深圳研究生院 | Multichannel transmitting and receiving front-end module for ultra-high field magnetic resonance imaging |
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