CN212435687U - Broadband radio frequency receiving assembly - Google Patents
Broadband radio frequency receiving assembly Download PDFInfo
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- CN212435687U CN212435687U CN202021595692.6U CN202021595692U CN212435687U CN 212435687 U CN212435687 U CN 212435687U CN 202021595692 U CN202021595692 U CN 202021595692U CN 212435687 U CN212435687 U CN 212435687U
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Abstract
The utility model discloses a broadband radio frequency receiving assembly, including the cavity shielding plug-in components box that has the apron, shielding plug-in components box inside is provided with two the same broadband radio frequency receiving module and a master control board, and two broadband radio frequency receiving modules are connected and controlled by it with the master control board electricity respectively, and two broadband radio frequency receiving module's input is connected with the microwave signal input terminal electricity on the shielding plug-in components box respectively, and the output is connected with the microwave signal output terminal electricity on the shielding plug-in components box respectively, and the input of master control board is connected with power input terminal and control signal communication terminal electricity on the shielding plug-in components box respectively. The utility model discloses a broadband radio frequency receiving assembly has realized the inside modularized design that adopts of subassembly, and the abundant ground connection of the inside chip of module has perfected subassembly heat dissipation measure, has accomplished the frivolousization of subassembly simultaneously, has realized the miniaturization.
Description
Technical Field
The utility model relates to a microwave communication technology field, specific theory relates to a broadband radio frequency receiving assembly in this field.
Background
With the development of radar detection and digital communication and interference techniques, a variety of wireless communication techniques have emerged in recent years. Among these new technologies, the broadband technology is a very advantageous wireless technology for transmitting data at a high speed over a short distance. As an important component of a broadband receiver, research on a broadband radio frequency receiving component is concerned, and the broadband radio frequency receiving component needs to cover a certain frequency band of a common device, and has multi-channel data processing capability, certain platform compatibility and universality.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an independent binary channels is provided and can extend wantonly, the broadband radio frequency receiving assembly of job stabilization reliable, low power dissipation.
In order to solve the technical problem, the utility model discloses a following technical scheme:
in a wideband radio frequency receiving assembly, the improvement comprising: including the cavity shielding plug-in components box that has the apron, shielding plug-in components box inside is provided with two the same broadband radio frequency receiving module and a master control board, and two broadband radio frequency receiving module are connected with the master control board electricity respectively and are controlled by it, and two broadband radio frequency receiving module's input is connected with the microwave signal input terminal electricity on the shielding plug-in components box respectively, and the output is connected with the microwave signal output terminal electricity on the shielding plug-in components box respectively, and the input of master control board is connected with power input terminal and control signal communication terminal electricity on the shielding plug-in components box respectively.
Furthermore, the shielding plug-in box adopts a VPX-6U standard structure, is designed with a single groove, is made of aluminum 6061, and has an inner surface which is subjected to conductive oxidation coating.
Furthermore, the broadband radio frequency receiving module comprises an amplitude limiting unit, a numerical control attenuation unit, a radio frequency amplification unit, a radio frequency switch filtering unit, a twice frequency mixing unit, an intermediate frequency switch filtering unit, a numerical control attenuation unit and an intermediate frequency amplification unit which are electrically connected together in sequence, wherein the amplitude limiting unit and the numerical control attenuation unit are electrically connected with the microwave signal input terminal, and the intermediate frequency amplification unit is electrically connected with the microwave signal output terminal.
Furthermore, the amplitude limiting and numerical control attenuation unit comprises an attenuator with 2 bits and 10dB stepping and 30dB attenuation range; the intermediate frequency switch filtering and numerical control attenuation unit comprises two single-pole three-throw switches and three paths of filters with different bandwidths, and a 6-bit attenuator with attenuation range of 31.5dB and 0.5dB step by step.
Further, the radio frequency switch filtering unit includes two paths of non-frequency-conversion filtering signals capable of being added with the amplifying unit, one path of frequency-conversion filtering signals capable of being added with the amplifying unit, and one path of external input Lo 1.
Further, the two-time mixing unit includes two external inputs Lo2 and Lo 3.
Furthermore, the main control panel internally comprises a power supply conversion unit, a filtering unit and a communication information processing unit, wherein the power supply conversion unit and the filtering unit process input voltage, and the communication information processing unit analyzes input signals and transmits the input signals to the two broadband radio frequency receiving modules.
Further, the main control board supports an RS422 interface, an RS232 interface and an SPI interface.
Furthermore, the shielding plug-in box comprises more than two microwave signal input terminals with different frequency bands.
Further, the microwave signal input terminal, the power input terminal, the control signal communication terminal and the microwave signal output terminal on the shielding card box are integrated into a hybrid integrated connector, and the hybrid integrated connector adopts a standard LRM connector.
The utility model has the advantages that:
the utility model discloses a broadband radio frequency receiving assembly has realized the inside modularized design that adopts of subassembly, and the abundant ground connection of the inside chip of module has perfected subassembly heat dissipation measure, has accomplished the frivolousization of subassembly simultaneously, has realized the miniaturization.
The utility model discloses a broadband radio frequency receiving assembly, signal dynamic range is big, and the amplitude limiting protection ability is high, and broadband operating band is wide, has good mirror image rejection ability and stronger frequency selectivity ability, designs long service life.
Drawings
Fig. 1 is a schematic block diagram of a broadband radio frequency receiving module disclosed in embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a shielding card box disclosed in embodiment 1 of the present invention;
fig. 3 is a schematic layout view of the shielding insert box disclosed in embodiment 1 of the present invention;
fig. 4 is a block diagram of a circuit of the broadband rf receiving module disclosed in embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Embodiment 1, as shown in fig. 1 to 3, this embodiment discloses a broadband radio frequency receiving assembly, which includes a hollow shielding plug-in box 1 with a cover plate, two same broadband radio frequency receiving modules 2 and a main control board 3 are arranged inside the shielding plug-in box, the two broadband radio frequency receiving modules are respectively electrically connected with and controlled by the main control board, the input ends of the two broadband radio frequency receiving modules are respectively electrically connected with a microwave signal input (RF input) terminal on the shielding plug-in box, the output ends of the two broadband radio frequency receiving modules are respectively electrically connected with a microwave signal output (IF output) terminal on the shielding plug-in box, and the input end of the main control board is respectively electrically connected with a power input terminal and a control signal communication terminal on the shielding plug-in.
In this embodiment, the shield card enclosure is of a VPX-6U standard construction, single slot design, is made of aluminum 6061, and has an inner surface that is conductively oxidized.
As shown in fig. 4, the broadband radio frequency receiving module includes an amplitude limiting unit, a numerical control attenuation unit 21, a radio frequency amplification unit 22, a radio frequency switch filtering unit 23, a twice frequency mixing unit 24, an intermediate frequency switch filtering unit, a numerical control attenuation unit 25 and an intermediate frequency amplification unit 26, which are electrically connected together in sequence, wherein the amplitude limiting unit, the numerical control attenuation unit is electrically connected with a microwave signal input terminal, and the intermediate frequency amplification unit is electrically connected with a microwave signal output terminal.
The amplitude limiting and numerical control attenuation unit comprises 2-bit attenuator with 10dB stepping and 30dB attenuation range, and is controlled by the main control board according to the instruction of the whole machine; the intermediate frequency switch filtering and numerical control attenuation unit comprises two single-pole three-throw switches, three paths of filters with different bandwidths and a 6-bit attenuator with attenuation range of 31.5dB in total for 0.5dB stepping, and the attenuator is controlled by the main control board according to instructions of the whole machine.
The radio frequency switch filtering unit comprises two paths of non-variable frequency filtering signals capable of being added with the amplifying unit, one path of variable frequency filtering signals capable of being added with the amplifying unit and one path of external input Lo1, signals are easier to process after variable frequency filtering, the filter design can be simplified and economical, and the switch switching can be quickly responded in real time by the main control panel according to frequency codes.
The twice-mixing unit comprises twice frequency conversion processing and two external inputs Lo2 and Lo3, and is not limited to twice frequency conversion. Lo2 can be controlled by the main control board according to the frequency code synchronous frequency hopping, and the external inputs Lo1, Lo2 and Lo3 are not limited to the external inputs, but can be realized internally.
The filtering unit adopts paster magnetic beads and a capacitor to assist in filtering;
the main control panel is inside including power conversion, filtering unit and communication information processing unit, power conversion, filtering unit handle input voltage (power conversion unit adopts DC/DC step down chip to carry out the step-down once to input voltage, and the voltage of reuse low dropout LDO stabiliser after to the step-down carries out secondary steady voltage), communication information processing unit analyzes input signal to transmit for two broadband radio frequency receiving module.
The main control panel is internally provided with a combination design of an FPGA and a singlechip, so that analysis of various communication interfaces of the whole machine can be realized, the function of the front end is realized, and a specific interface supports an RS422 interface, an RS232 interface and an SPI interface.
The shielding plug-in box comprises more than two microwave signal input terminals with different frequency bands.
The microwave signal input terminal, the power input terminal, the control signal communication terminal and the microwave signal output terminal on the shielding plug-in box are integrated into a hybrid integrated connector, and the hybrid integrated connector adopts a standard LRM connector.
The working process of the broadband radio frequency receiving component disclosed by the embodiment is as follows: microwave signals are input from a microwave signal input terminal, pass through an amplitude limiting unit and a numerical control attenuation unit, are amplified through a radio frequency amplification unit, are subjected to filtering or frequency conversion filtering processing through different segmented branches when passing through a radio frequency switch filtering unit according to different frequency bands of the input signals, are subjected to frequency mixing with an external input Lo2 and an external input Lo3 through a twice frequency mixing unit and then become an intermediate frequency, and are output through a microwave signal output terminal after continuously passing through an intermediate frequency switch filtering unit, a numerical control attenuation unit and an intermediate frequency amplification unit.
The main technical indexes of the broadband radio frequency receiving component disclosed by the embodiment are as follows: the working frequency is as follows: 0.03-6 GHz; outputting an intermediate frequency: 750 MHz; intermediate frequency suppression: not less than 60 dB; image frequency suppression: not less than 60 dB; and (3) out-of-band harmonic suppression: not less than 65 dB; noise coefficient: less than or equal to 6 dB; gain: 45 +/-1 dB; receiving channel burnout resistance power: not less than 2W; inputting a standing wave: less than or equal to 2; outputting a standing wave: less than or equal to 1.5; power supply: + 12V/0.8A.
Claims (10)
1. A wideband radio frequency receive module, characterized by: including the cavity shielding plug-in components box that has the apron, shielding plug-in components box inside is provided with two the same broadband radio frequency receiving module and a master control board, and two broadband radio frequency receiving module are connected with the master control board electricity respectively and are controlled by it, and two broadband radio frequency receiving module's input is connected with the microwave signal input terminal electricity on the shielding plug-in components box respectively, and the output is connected with the microwave signal output terminal electricity on the shielding plug-in components box respectively, and the input of master control board is connected with power input terminal and control signal communication terminal electricity on the shielding plug-in components box respectively.
2. The wideband radio frequency receive module of claim 1, wherein: the shielding plug-in box adopts a VPX-6U standard structure, is designed with a single groove, is made of aluminum 6061, and has an inner surface which is provided with a conductive oxidation coating.
3. The wideband radio frequency receive module of claim 1, wherein: the broadband radio frequency receiving module comprises an amplitude limiting unit, a numerical control attenuation unit, a radio frequency amplification unit, a radio frequency switch filtering unit, a twice frequency mixing unit, an intermediate frequency switch filtering unit, a numerical control attenuation unit and an intermediate frequency amplification unit which are electrically connected together in sequence, wherein the amplitude limiting unit and the numerical control attenuation unit are electrically connected with a microwave signal input terminal, and the intermediate frequency amplification unit is electrically connected with a microwave signal output terminal.
4. The wideband radio frequency receive module of claim 3, wherein: the amplitude limiting and numerical control attenuation unit comprises an attenuator with 2 bits and 10dB stepping and an attenuation range of 30 dB; the intermediate frequency switch filtering and numerical control attenuation unit comprises two single-pole three-throw switches and three paths of filters with different bandwidths, and a 6-bit attenuator with attenuation range of 31.5dB and 0.5dB step by step.
5. The wideband radio frequency receive module of claim 3, wherein: the radio frequency switch filtering unit comprises two paths of non-variable frequency filtering signals capable of being added with the amplifying unit, one path of variable frequency filtering signals capable of being added with the amplifying unit and one path of external input Lo 1.
6. The wideband radio frequency receive module of claim 3, wherein: the double mixing unit comprises two external inputs Lo2 and Lo 3.
7. The wideband radio frequency receive module of claim 1, wherein: the main control panel comprises a power supply conversion unit, a filtering unit and a communication information processing unit, wherein the power supply conversion unit and the filtering unit process input voltage, and the communication information processing unit analyzes input signals and transmits the input signals to the two broadband radio frequency receiving modules.
8. The wideband radio frequency receive module of claim 1, wherein: the main control board supports an RS422 interface, an RS232 interface and an SPI interface.
9. The wideband radio frequency receive module of claim 1, wherein: the shielding plug-in box comprises more than two microwave signal input terminals with different frequency bands.
10. The wideband radio frequency receive module of claim 1, wherein: the microwave signal input terminal, the power input terminal, the control signal communication terminal and the microwave signal output terminal on the shielding plug-in box are integrated into a hybrid integrated connector, and the hybrid integrated connector adopts a standard LRM connector.
Priority Applications (1)
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CN202021595692.6U CN212435687U (en) | 2020-08-04 | 2020-08-04 | Broadband radio frequency receiving assembly |
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CN202021595692.6U CN212435687U (en) | 2020-08-04 | 2020-08-04 | Broadband radio frequency receiving assembly |
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CN212435687U true CN212435687U (en) | 2021-01-29 |
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CN202021595692.6U Active CN212435687U (en) | 2020-08-04 | 2020-08-04 | Broadband radio frequency receiving assembly |
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