CN114374402B - High-compatibility front-end receiving assembly - Google Patents
High-compatibility front-end receiving assembly Download PDFInfo
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- CN114374402B CN114374402B CN202210016168.6A CN202210016168A CN114374402B CN 114374402 B CN114374402 B CN 114374402B CN 202210016168 A CN202210016168 A CN 202210016168A CN 114374402 B CN114374402 B CN 114374402B
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- 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
- H04B1/06—Receivers
- H04B1/16—Circuits
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- 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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
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- 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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The invention relates to the technical field of receiving components, in particular to a high-compatibility front-end receiving component, which comprises a radio frequency receiving unit, a filter integrating unit and a signal adjusting unit, wherein the radio frequency receiving unit, the filter integrating unit and the signal adjusting unit are sequentially in signal communication; the filter integration unit comprises a first filter bank unit and a second filter bank unit which are interconnected through signals, and the first filter bank unit and the second filter bank unit are of tile-type unit structures; the signal adjusting unit is internally communicated with the logarithmic detection video amplifier, the radio frequency receiving unit, the filter integrating unit and the signal adjusting unit are arranged, the continuous processing effect of signals can be efficiently guaranteed, and meanwhile, the compatibility effect can be improved.
Description
Technical Field
The present invention relates to the field of receiving modules, and in particular, to a front end receiving module with high compatibility.
Background
The traditional front end receiving assembly adopts the brick type design, all components and parts are integrated in a shell to form an integral assembly, the multifunctional front end receiving assembly is characterized by multifunction and high circuit integration level, however, functional units are solidified at the beginning of the design, once the performance of monitoring equipment needs to be improved or changed, the internal circuit functions of the front end receiving assembly cannot be adapted in time, meanwhile, the front end receiving assembly can also be reduced in anti-interference capability due to the change of an environmental magnetic field, normal receiving operation of the monitoring equipment can be influenced when serious, the problem of poor compatibility is not reflected, and meanwhile, the front end receiving assembly in the prior art usually adopts an oversized filter bank, so that the problem of higher maintenance cost can also occur.
Therefore, according to the prior art and the use environment, it is necessary to provide a small-volume front-end receiving component which can adapt to sudden environmental changes and magnetic field changes, so as to improve the compatibility of the receiving component in applications such as monitoring equipment, and further ensure the timely adjustment of the adapting rate of the receiving component when environmental field factors change, and finally ensure the normal operation of the monitoring equipment.
Disclosure of Invention
The invention aims to provide a front-end receiving component with high compatibility, which solves the problem of serious interference of environmental field factors caused by poor compatibility of the front-end receiving component in the prior art.
The invention aims at realizing the following technical scheme, which comprises a radio frequency receiving unit, a filter integrating unit and a signal adjusting unit which are sequentially communicated with each other; the filter integration unit comprises a first filter bank unit and a second filter bank unit which are interconnected through signals, and the first filter bank unit and the second filter bank unit are of tile-type unit structures; the signal adjusting unit is internally communicated with a logarithmic detection video amplifier.
It should be noted that, by setting the radio frequency receiving unit, the filter integrating unit and the signal adjusting unit, the continuous processing effect of the signal can be efficiently ensured, and meanwhile, the compatibility effect can be improved.
The radio frequency receiving unit comprises a self-checking switch, a low noise amplifier and a first numerical control attenuator which are sequentially in signal communication, wherein the first numerical control attenuator is configured for signal gain adjustment.
The first digitally controlled attenuator may be configured to perform gain adjustment on the signal in the path, which is a coarse range adjustment.
The first filter bank unit comprises a first broadband switch, a first band-reject filter and a second broadband switch which are in signal communication in sequence, wherein the first broadband switch and the second broadband switch are jointly configured for collecting scattered signals.
It should be noted that, the first broadband switch, the first band-stop filter and the second broadband switch can ensure that the signal transmission is more stable, and meanwhile, the signal shunt collection function is achieved.
The second filter bank unit comprises a third broadband switch, a second band-stop filter, a third band-stop filter and a fourth broadband switch which are in signal communication in sequence.
It should be noted that, the third broadband switch, the second band-stop filter, the third band-stop filter and the fourth broadband switch can ensure the stability of signal transmission and the cooperative transmission effect of signals.
The second band-stop filter, the third band-stop filter and the first band-stop filter all adopt silicon-based three-dimensional stacked structures.
It should be noted that, as a result of the three-dimensional stacking of silicon substrates, the volume of the band-stop filter can be effectively reduced.
And buffer layers for preventing frequency offset are flexibly connected to the first filter bank unit and the second filter bank unit.
It should be noted that, setting up the buffer layer can effectively release stress, avoids the frequency offset, guarantees the radio frequency index.
The logarithmic detection video amplifier is internally connected with a second digital attenuator, a continuous detection logarithmic amplifier and an operational amplifier in a signal way, wherein the second digital attenuator is configured for gain fine adjustment.
It should be noted that the second digital attenuator may be provided to ensure that the signal gain may be finely adjusted.
The self-checking switch is internally integrated with a switch chip and a microstrip line, wherein the switch chip is connected with the microstrip line through a gold wire, and the coplanar waveguide structure is used for improving isolation.
It should be noted that, the isolation of the switch can be effectively improved by setting the coplanar waveguide structure.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the radio frequency receiving unit, the filter integrating unit and the signal adjusting unit are arranged, so that the continuous processing effect of signals can be efficiently ensured, and meanwhile, the compatibility effect can be improved;
2. setting a first numerical control attenuator to perform gain adjustment on signals in a channel, wherein the gain adjustment is coarse range adjustment;
3. the buffer layer is arranged to effectively release stress, avoid frequency offset and ensure radio frequency index.
Drawings
FIG. 1 is a schematic diagram of a front end receive assembly of the present invention;
FIG. 2 is a graph of the isolation change of the self-test switch of the present invention;
FIG. 3 is a schematic diagram of a buffer layer structure according to the present invention.
Legend description: 1-a self-checking switch; a 2-low noise amplifier; 3-a first digitally controlled attenuator; 4-a first broadband switch; 5-a first band reject filter; 6-a second broadband switch; 7-a third broadband switch; 8-a second band reject filter; 9-a third band reject filter; 10-fourth broadband switch; 11-a second digital attenuator; 12-a continuous detection logarithmic amplifier; 13-an operational amplifier; 14-buffer layer.
Detailed Description
Referring to fig. 1-3 together, the present embodiment provides a high-compatibility front-end receiving module, which is mainly used for solving the problem of serious interference of environmental field factors caused by poor compatibility of the front-end receiving module in the prior art, and the front-end receiving module is already in a practical use stage.
The specific embodiment of the invention is as follows: the device comprises a radio frequency receiving unit, a filter integrating unit and a signal adjusting unit which are sequentially communicated with each other; the filter integration unit comprises a first filter bank unit and a second filter bank unit which are interconnected by signals, and the first filter bank unit and the second filter bank unit are of tile-type unit structures; the signal conditioning unit is internally provided with a logarithmic detection video amplifier in a signal communication way, the radio frequency receiving unit comprises a self-checking switch 1, a low noise amplifier 2 and a first numerical control attenuator 3 which are sequentially in signal communication, wherein the first numerical control attenuator 3 is configured for signal gain conditioning, the first filter group unit comprises a first broadband switch 4, a first band stop filter 5 and a second broadband switch 6 which are sequentially in signal communication, the first broadband switch 4 and the second broadband switch 6 are jointly configured for dispersing signals, the second filter group unit comprises a third broadband switch 7, a second band stop filter 8, a third band stop filter 9 and a fourth broadband switch 10 which are sequentially in signal communication way, the second band stop filter 8, the third band stop filter 9 and the first band stop filter 5 are all in a silicon-based three-dimensional stacked structure, the first filter group unit and the second filter group unit are flexibly connected with buffer layers for preventing frequency offset, the logarithmic detection video amplifier is internally provided with a second digital control attenuator 11, a continuous logarithmic detection amplifier 12 and a coplanar waveguide 13, and the second chip amplifier are connected with the microstrip line through a microstrip line, and the microstrip line is provided with a micro-level isolation waveguide structure, and the self-tuning chip is provided with a micro-level isolation structure.
The method comprises the following steps: the structure of the front end receiving assembly refers to the attached figure 1, an input signal firstly passes through a self-checking switch in a radio frequency receiving unit, the switch can switch a working signal and a self-checking signal to a main path, then the signal enters a low noise amplifier, the gain in the process is 15dB, then the signal is transmitted to a numerical control attenuator, the numerical control attenuator is a 3-bit numerical control attenuator chip, three bits of the numerical control attenuator chip are sequentially 5dB, 10dB and 20dB, the self-checking switch is responsible for switching one path of the working path signal and the self-checking path signal to the main path, in order to effectively isolate the signal interference of the other path, the isolation degree of the broadband switch is generally greater than or equal to 35dBc, however, the actual isolation degree of the existing single-stage switch is not less than 35dBc due to the space coupling effect between microstrip lines, the requirement of the isolation degree cannot be met, the adoption of the application can realize the isolation degree, the microstrip line near the self-checking switch is set to be a coplanar waveguide structure, the coplanar waveguide structure has obvious advantage compared with the traditional microstrip line structure, the coplanar waveguide structure has a good shielding effect between the adjacent coplanar waveguide structures, and accordingly, the isolation degree is improved, and the microstrip line near the coplanar waveguide structure is connected with the coplanar waveguide structure through the gold waveguide structure. With reference to the description of fig. 2, after the technical scheme is adopted, the switch of the self-checking switch circuit has the self-checking switch isolation degree of more than or equal to 35dBc in the range of DC-20 GHz frequency band, and the performance improvement is obvious.
Furthermore, the traditional filter bank structure adopts a brick type design, all components are integrated in a shell to form a whole assembly, and the filter bank structure is characterized by multifunction and high circuit integration level, but has the obvious defects of poor compatibility and difficult replacement, the first filter bank unit and the second filter bank unit adopt a unit structure for vertical transmission of tile-type radio frequency signals, and the volume of each tile-type unit is as follows: length x width x height = 30mm x 20mm x 10mm.
Still further, the filter bank is integrated in the tile-type unit, the radio frequency signal transmission at the port adopts SMP vertical transition, gold-tin welding is adopted between SMP and the inner wall of the mounting groove, the local section of the SMP mounting hole at the vertical transition is divided into 3 steps, after the SMP is transited to the microstrip line, the connection between the microstrip line and the filter bank is realized through gold-tin bonding, the control port adopts pin-arranging insulator at the side surface of the unit structure, the soldering connection is adopted, the cover plate of the tile-type unit and the shell are connected through laser welding, wherein the filter banks in the two units adopt high-integration silicon-based three-dimensional filter banks, the volume is only one tenth of that of the original, the miniaturization of the system is realized, the traditional silicon-based filter assembly structure is bonded with the kovar gasket through conductive adhesive, and the expansion coefficient of silicon is 2.5x10 -6 K, and the expansion coefficient of the kovar gasket is 5.3X10 -6 and/K, the difference between the two is larger, and the stress is generated inside the device at high and low temperatures. The microstrip line in the silicon-based three-dimensional filter bank is very thin and deforms under the action of stress, so that the band-stop frequency band is deviated and no phenomenon existsBased on the method, a silicon-based buffer layer with the thickness of 200-300 um is added between the silicon-based three-dimensional band-stop filter group and the kovar gasket, silicon through holes with the aperture of 50-100 um are uniformly distributed on the silicon-based buffer layer, the space between the silicon through holes is more than or equal to 200um, the stress between the silicon-based three-dimensional filter group and the kovar gasket is effectively released through the silicon-based buffer layer, the performance deterioration caused by deformation is prevented,
still further, connect through the connector between tile formula radio frequency signal vertical transmission's unit and the next level unit and connect, tile formula radio frequency signal vertical transmission's unit advantage is: the internal air tightness is good, the stability and the reliability of signal transmission can be ensured, and the service life and the use reliability are improved; the unit is small in size, convenient to replace and high in compatibility.
Furthermore, the signal enters a logarithmic detection video amplifier unit, the front-stage radio frequency signal firstly enters a numerical control attenuator 11 for port gain fine adjustment, and then enters a continuous detection logarithmic amplifier 12 for detection, and the main function of the signal is power detection, so that the microwave radio frequency input signal can be accurately converted into a video signal in dB units for output. The detected video signal then enters an operational amplifier 13 to perform log slope amplification and baseline adjustment, and is finally output.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The front-end receiving assembly with high compatibility is characterized by comprising a radio frequency receiving unit, a filter integrating unit and a signal adjusting unit which are in signal communication in sequence;
the filter integration unit comprises a first filter bank unit and a second filter bank unit which are interconnected through signals, and the first filter bank unit and the second filter bank unit are of tile-type unit structures;
a logarithmic detection video amplifier is in signal communication in the signal adjusting unit;
the radio frequency receiving unit comprises a self-checking switch (1), a low-noise amplifier (2) and a first numerical control attenuator (3) which are in signal communication in sequence, wherein the first numerical control attenuator (3) is configured for signal gain adjustment.
2. A high-compatibility front-end receiving assembly according to claim 1, characterized in that the first filter bank unit comprises a first wideband switch (4), a first band reject filter (5) and a second wideband switch (6) in signal communication in sequence, wherein the first wideband switch (4) and the second wideband switch (6) are jointly configured for collecting a dispersive signal.
3. A high-compatibility front-end receiving assembly according to claim 2, characterized in that the second filter bank unit comprises a third wideband switch (7), a second bandstop filter (8), a third bandstop filter (9) and a fourth wideband switch (10) in signal communication in sequence.
4. A high-compatibility front-end receiving assembly according to claim 3, characterized in that the second band-reject filter (8), the third band-reject filter (9) and the first band-reject filter (5) all adopt a silicon-based three-dimensional stack structure.
5. The high-compatibility front-end receiving assembly of claim 1, wherein a buffer layer for preventing frequency offset is flexibly connected to each of the first filter bank unit and the second filter bank unit.
6. The high-compatibility front-end receiving assembly of claim 1, wherein a second digital attenuator (11), a continuous detection logarithmic amplifier (12) and an operational amplifier (13) are signally connected within the logarithmic detection video amplifier, wherein the second digital attenuator (11) is configured for gain trimming.
7. The front-end receiving assembly with high compatibility according to claim 1, wherein a switch chip with a coplanar waveguide structure and a microstrip line are integrated in the self-checking switch (1), wherein the switch chip is connected with the microstrip line through a gold wire, and the coplanar waveguide structure is used for improving isolation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210016168.6A CN114374402B (en) | 2022-01-07 | 2022-01-07 | High-compatibility front-end receiving assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210016168.6A CN114374402B (en) | 2022-01-07 | 2022-01-07 | High-compatibility front-end receiving assembly |
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| CN114374402A CN114374402A (en) | 2022-04-19 |
| CN114374402B true CN114374402B (en) | 2023-07-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111130461A (en) * | 2019-12-27 | 2020-05-08 | 中国航天科工集团八五一一研究所 | Broadband miniaturization up-conversion assembly |
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| CN102832959B (en) * | 2012-08-22 | 2015-01-21 | 天津大学 | Radio-frequency front end in high and medium frequency superheterodyne+zero intermediate frequency structure |
| EP2913936A4 (en) * | 2012-10-26 | 2015-12-09 | Zte Corp | Integrated receiving apparatus |
| CN109347507A (en) * | 2018-10-29 | 2019-02-15 | 中国航空无线电电子研究所 | Broadband can configure C-band radio-frequency front-end |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111130461A (en) * | 2019-12-27 | 2020-05-08 | 中国航天科工集团八五一一研究所 | Broadband miniaturization up-conversion assembly |
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