CN220190863U - Frequency conversion assembly for receiving frequency converter - Google Patents
Frequency conversion assembly for receiving frequency converter Download PDFInfo
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- CN220190863U CN220190863U CN202321577100.1U CN202321577100U CN220190863U CN 220190863 U CN220190863 U CN 220190863U CN 202321577100 U CN202321577100 U CN 202321577100U CN 220190863 U CN220190863 U CN 220190863U
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Abstract
The utility model provides a frequency conversion assembly for a receiving frequency converter. The frequency conversion channel comprises a first amplifier, a high-pass filter, a first mixer, a first numerical control attenuator, a second band-pass filter, a second amplifier, a first low-pass filter, a second mixer, a second numerical control attenuator, a second low-pass filter, a third amplifier, a third numerical control attenuator, a fourth amplifier, a first single-pole double-throw switch, a third band-pass filter, a fourth band-pass filter, a second single-pole double-throw switch, wherein the fixed end of the second single-pole double-throw switch is connected with the output end of the frequency conversion channel. The utility model has the advantages that: the FPGA control panel controls the attenuation of the first numerical control attenuator, the second numerical control attenuator and the third numerical control attenuator, the variable frequency of the whole variable frequency channel can be regulated and controlled according to the requirement, the flexibility of the variable frequency assembly is improved, and the applicability is stronger.
Description
Technical Field
The utility model relates to the technical field of communication, in particular to a frequency conversion assembly for a receiving frequency converter.
Background
With the growing development of communication technology, variable frequency channels are increasingly used in civil and military fields, and variable frequency signals have become a key component of radio communication and radar systems.
If the frequency conversion assembly for receiving the frequency converter has the authorized bulletin number of CN210327507U, through setting two identical frequency conversion channels and setting a first local oscillator and a second local oscillator, a first local oscillator signal generated by the first local oscillator and the second local oscillator is divided into two channels through a local oscillator power divider, and each channel of signal is respectively input into a mixer of one channel of frequency conversion channel, so that the synchronism of the local oscillator signals transmitted to the two channels is ensured, and the signals are mixed with radio frequency signals. The required intermediate frequency is obtained through the secondary down-conversion, the link gain distribution is balanced, and the matching degree among all devices is good. But this frequency conversion subassembly variable frequency volume is fixed, can't regulate and control as required, uses inflexibly. To this end, a frequency conversion assembly for a receiving frequency converter is proposed for improvement.
Disclosure of Invention
The object of the present utility model is to solve at least one of the technical drawbacks.
It is therefore an object of the present utility model to propose a frequency conversion assembly for a receiving frequency converter, which solves the problems mentioned in the background art, overcoming the drawbacks of the prior art.
In order to achieve the above objective, an embodiment of an aspect of the present utility model provides a frequency conversion assembly for receiving a frequency converter, including two identical frequency conversion channels, where the frequency conversion channels include a radio frequency input interface, an output end of the radio frequency input interface is connected with a first amplifier, an output end of the first amplifier is connected with a high-pass filter, an output end of the high-pass filter is connected with a first mixer, an output end of the first mixer is connected with a first digitally controlled attenuator, an output end of the first digitally controlled attenuator is connected with a second bandpass filter, an output end of the second bandpass filter is connected with a second amplifier, an output end of the second amplifier is connected with a first low-pass filter, an output end of the first low-pass filter is connected with a second mixer, an output end of the second mixer is connected with a second digitally controlled attenuator, an output end of the second low-pass filter is connected with a third digitally controlled attenuator, an output end of the second lowpass filter is connected with a single-pole-throw filter, a single-pole output end of the second bandpass filter is connected with a single-pole-throw filter, and a double-pole filter is connected with a single-pole filter.
By any of the above schemes, preferably, the radio frequency input interface includes a power divider, the power divider divides an input radio frequency signal into two paths, two output ends of the power divider are respectively connected with two first band-pass filters, and the first amplifier is connected with an output end of the first band-pass filter.
The technical scheme is adopted: the first amplifier is used for amplifying the accessed radio frequency signal, and the high-pass filter is used for carrying out high-pass filtering on the signal after the first amplification to filter low-frequency clutter in the signal. The first mixer mixes the high-pass filtered signal with a first local oscillation signal, and the first numerical control attenuator attenuates the mixed signal. The second band-pass filter carries out band-pass filtering on the signals after the first-stage attenuation, the second amplifier amplifies the signals after the band-pass filtering, and the first low-pass filter carries out low-pass filtering on the signals after the second amplification. The subsequent structure is similar to the structure in function, and the radio frequency signal is subjected to step-by-step frequency conversion.
By the above-mentioned arbitrary scheme preferred, the frequency conversion subassembly still includes first local oscillator and second local oscillator, first local oscillator and second local oscillator all include the frequency source, the output of frequency source is connected with fifth band-pass filter, the output of fifth band-pass filter is connected with the local oscillator power divider, two outputs of local oscillator power divider all are connected with fifth amplifier, the output of fifth amplifier all is connected with third low pass filter, the output of third low pass filter is connected with first mixer.
Preferably, in any of the above schemes, the frequency sources of the first local oscillator and the second local oscillator generate radio frequency signals with different frequencies.
The technical scheme is adopted: the frequency sources of the first local oscillator and the second local oscillator output radio frequency signals, and the fifth band-pass filter is connected with the output end of the frequency source and carries out band-pass filtering on the radio frequency signals. The local oscillator power divider divides the signal power after band-pass filtering into two paths, and outputs the signal power to the third low-pass filter for low-pass filtering after being amplified by the fifth amplifier, and finally inputs the signal power to the mixer. The same local oscillator is adopted to provide mixing local oscillators for the two frequency conversion channels respectively, so that the synchronism of local oscillator signals transmitted to the two channels is ensured, and meanwhile, the signal error introduced by the local oscillator signals is reduced.
By any of the above schemes, preferably, the frequency conversion channel further comprises an FPGA control board, and the output end of the FPGA control board is connected with the control ends of the first digital control attenuator, the second digital control attenuator and the third digital control attenuator of the frequency conversion channel respectively.
By the above scheme, preferably, the frequency conversion channel further comprises a detection control channel, the detection control channel comprises a coupler, the input end of the coupler is connected with the fixed end of the second single-pole double-throw switch, two output ends of the coupler are respectively connected with the intermediate frequency output end and a fourth digital control attenuator, and the output end of the fourth digital control attenuator is connected with a detector.
By any of the above schemes, it is preferable that the detection control channel further comprises an AD converter with an input end connected to the detector, and an output end of the AD converter is connected to the FPGA control board.
The technical scheme is adopted: the FPGA control panel controls the attenuation of the first digital control attenuator, the second digital control attenuator and the third digital control attenuator, so that the variable frequency of the whole variable frequency channel can be regulated and controlled as required, the flexibility of the variable frequency assembly is improved, and the applicability is stronger. The coupler divides the radio frequency signal power into two paths, one path is connected with the intermediate frequency output end, the other path is connected with a fourth digital control attenuator, the fourth-stage attenuation is carried out, and then the signal is output to the detector, and the detector amplifies the signal and outputs the signal to the FPGA control board.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
1. this a frequency conversion subassembly for receiving converter establishes the FPGA control panel through adding at the end of frequency conversion passageway to the cooperation sets up detection control channel, and the coupler is divided into two-way with radio frequency signal merit, and one way is connected with the intermediate frequency output, and another way is connected with fourth numerical control attenuator, carries out the fourth level and attenuates the back and exports the detector, and the detector is with the signal amplification, and exports the FPGA control panel. The FPGA control panel controls the attenuation of the first digital control attenuator, the second digital control attenuator and the third digital control attenuator, so that the variable frequency of the whole variable frequency channel can be regulated and controlled as required, the flexibility of the variable frequency assembly is improved, and the applicability is stronger.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a block diagram of the structure of the present utility model;
fig. 2 is a schematic diagram of a frequency conversion channel structure according to the present utility model.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1-2, the utility model comprises two identical frequency conversion channels, each frequency conversion channel comprises a radio frequency input interface, the output end of the radio frequency input interface is connected with a first amplifier, the output end of the first amplifier is connected with a high-pass filter, the output end of the high-pass filter is connected with a first mixer, the output end of the first mixer is connected with a first numerical control attenuator, the output end of the first numerical control attenuator is connected with a second band-pass filter, the output end of the second band-pass filter is connected with a second amplifier, the output end of the second amplifier is connected with a first low-pass filter, the output end of the first low-pass filter is connected with a second mixer, the output end of the second mixer is connected with a second digital control attenuator, the output end of the second digital control attenuator is connected with a second low-pass filter, the output end of the second low-pass filter is connected with a third digital control attenuator, the output end of the third digital control attenuator is connected with a fourth amplifier, the output end of the fourth amplifier is connected with a first single-pole double-throw switch, two moving ends of the first single-pole double-throw switch are respectively connected with a third band-pass filter and a fourth band-pass filter, the output ends of the third band-pass filter and the fourth band-pass filter are connected with a second single-pole double-throw switch, and the moving end of the second single-pole double-throw switch is connected with the output end of the frequency conversion channel.
Example 1: the radio frequency input interface comprises a power divider, the power divider divides an input radio frequency signal into two paths, two output ends of the power divider are respectively connected with two first band-pass filters, and the first amplifier is connected with the output ends of the first band-pass filters. The first amplifier is used for amplifying the accessed radio frequency signal, and the high-pass filter is used for carrying out high-pass filtering on the signal after the first amplification to filter low-frequency clutter in the signal. The first mixer mixes the high-pass filtered signal with a first local oscillation signal, and the first numerical control attenuator attenuates the mixed signal. The second band-pass filter carries out band-pass filtering on the signals after the first-stage attenuation, the second amplifier amplifies the signals after the band-pass filtering, and the first low-pass filter carries out low-pass filtering on the signals after the second amplification. The subsequent structure is similar to the structure in function, and the radio frequency signal is subjected to step-by-step frequency conversion.
Example 2: the frequency conversion assembly further comprises a first local oscillator and a second local oscillator, the first local oscillator and the second local oscillator both comprise frequency sources, the output end of each frequency source is connected with a fifth bandpass filter, the output end of each fifth bandpass filter is connected with a local oscillator power divider, two output ends of each local oscillator power divider are both connected with a fifth amplifier, the output ends of each fifth amplifier are both connected with a third low-pass filter, and the output end of each third low-pass filter is connected with the first mixer. The frequency sources of the first local oscillator and the second local oscillator generate radio frequency signals with different frequencies. The frequency sources of the first local oscillator and the second local oscillator output radio frequency signals, and the fifth band-pass filter is connected with the output end of the frequency source and carries out band-pass filtering on the radio frequency signals. The local oscillator power divider divides the signal power after band-pass filtering into two paths, and outputs the signal power to the third low-pass filter for low-pass filtering after being amplified by the fifth amplifier, and finally inputs the signal power to the mixer. The same local oscillator is adopted to provide mixing local oscillators for the two frequency conversion channels respectively, so that the synchronism of local oscillator signals transmitted to the two channels is ensured, and meanwhile, the signal error introduced by the local oscillator signals is reduced.
Example 3: the frequency conversion channel further comprises an FPGA control board, and the output end of the FPGA control board is respectively connected with the control ends of the first numerical control attenuator, the second numerical control attenuator and the third numerical control attenuator of the frequency conversion channel. The frequency conversion channel further comprises a detection control channel, the detection control channel comprises a coupler, the input end of the coupler is connected with the fixed end of the second single-pole double-throw switch, the two output ends of the coupler are respectively connected with the intermediate frequency output end and the fourth digital control attenuator, and the output end of the fourth digital control attenuator is connected with the detector. The detection control channel also comprises an AD converter with an input end connected with the detector, and an output end of the AD converter is connected with the FPGA control board. The FPGA control panel controls the attenuation of the first digital control attenuator, the second digital control attenuator and the third digital control attenuator, so that the variable frequency of the whole variable frequency channel can be regulated and controlled as required, the flexibility of the variable frequency assembly is improved, and the applicability is stronger. The coupler divides the radio frequency signal power into two paths, one path is connected with the intermediate frequency output end, the other path is connected with a fourth digital control attenuator, the fourth-stage attenuation is carried out, and then the signal is output to the detector, and the detector amplifies the signal and outputs the signal to the FPGA control board.
The working principle of the utility model is as follows:
s1, an input radio frequency signal is divided into two paths by a power divider, filtered by a first band-pass filter and then output to two paths of frequency conversion channels;
s2, the local oscillator power divider divides the signal power after band-pass filtering into two paths, and outputs the signal power to a third low-pass filter for low-pass filtering after being amplified by a fifth amplifier, and finally the signal power is input to a mixer to assist the frequency conversion channel in frequency conversion;
s3, the coupler divides the radio frequency signal power into two paths, one path is connected with the intermediate frequency output end, the other path is connected with a fourth digital control attenuator, the fourth-stage attenuation is carried out, and then the signal is output to the detector, and the detector amplifies the signal and outputs the signal to the FPGA control board. The FPGA control board controls the attenuation amounts of the first numerical control attenuator, the second numerical control attenuator and the third numerical control attenuator.
Compared with the prior art, the utility model has the following beneficial effects compared with the prior art:
1. this a frequency conversion subassembly for receiving converter establishes the FPGA control panel through adding at the end of frequency conversion passageway to the cooperation sets up detection control channel, and the coupler is divided into two-way with radio frequency signal merit, and one way is connected with the intermediate frequency output, and another way is connected with fourth numerical control attenuator, carries out the fourth level and attenuates the back and exports the detector, and the detector is with the signal amplification, and exports the FPGA control panel. The FPGA control panel controls the attenuation of the first digital control attenuator, the second digital control attenuator and the third digital control attenuator, so that the variable frequency of the whole variable frequency channel can be regulated and controlled as required, the flexibility of the variable frequency assembly is improved, and the applicability is stronger.
Claims (7)
1. A frequency conversion assembly for a receiving frequency converter comprises two identical frequency conversion channels; it is characterized in that the frequency conversion channel comprises a radio frequency input interface, the output end of the radio frequency input interface is connected with a first amplifier, the output end of the first amplifier is connected with a high-pass filter, the output end of the high-pass filter is connected with a first mixer, the output end of the first mixer is connected with a first numerical control attenuator, the output end of the first numerical control attenuator is connected with a second band-pass filter, the output end of the second band-pass filter is connected with a second amplifier, the output end of the second amplifier is connected with a first low-pass filter, the output end of the first low-pass filter is connected with a second mixer, the output end of the second mixer is connected with a second digital control attenuator, the output end of the second digital control attenuator is connected with a second low-pass filter, the output end of the second low-pass filter is connected with a third digital control attenuator, the output end of the third digital control attenuator is connected with a fourth amplifier, the output end of the fourth amplifier is connected with a first single-pole double-throw switch, two moving ends of the first single-pole double-throw switch are respectively connected with a third band-pass filter and a fourth band-pass filter, the output ends of the third band-pass filter and the fourth band-pass filter are connected with a second single-pole double-throw switch, and the non-moving end of the second single-pole double-throw switch is connected with the output end of the frequency conversion channel.
2. A frequency conversion assembly for a receiving frequency converter as claimed in claim 1, wherein: the radio frequency input interface comprises a power divider, the power divider divides an input radio frequency signal into two paths, two output ends of the power divider are respectively connected with two first band-pass filters, and the first amplifier is connected with the output ends of the first band-pass filters.
3. A frequency conversion assembly for a receiving frequency converter as claimed in claim 2, wherein: the frequency conversion assembly further comprises a first local oscillator and a second local oscillator, the first local oscillator and the second local oscillator comprise frequency sources, the output end of each frequency source is connected with a fifth band-pass filter, the output end of each fifth band-pass filter is connected with a local oscillator power divider, two output ends of each local oscillator power divider are connected with a fifth amplifier, the output ends of each fifth amplifier are connected with a third low-pass filter, and the output end of each third low-pass filter is connected with the first mixer.
4. A frequency conversion assembly for a receiving frequency converter as claimed in claim 3, wherein: the frequency sources of the first local oscillator and the second local oscillator generate radio frequency signals with different frequencies.
5. A transducer assembly for a receiving transducer as defined in claim 4, wherein: the variable frequency channel further comprises an FPGA control board, and the output end of the FPGA control board is respectively connected with the control ends of the first digital control attenuator, the second digital control attenuator and the third digital control attenuator of the variable frequency channel.
6. A transducer assembly for a receiving transducer as defined in claim 5, wherein: the frequency conversion channel further comprises a detection control channel, the detection control channel comprises a coupler, the input end of the coupler is connected with the fixed end of the second single-pole double-throw switch, two output ends of the coupler are respectively connected with an intermediate frequency output end and a fourth digital control attenuator, and the output end of the fourth digital control attenuator is connected with a detector.
7. A transducer assembly for a receiving transducer as defined in claim 6, wherein: the detection control channel also comprises an AD converter with an input end connected with the detector, and an output end of the AD converter is connected with the FPGA control board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321577100.1U CN220190863U (en) | 2023-06-20 | 2023-06-20 | Frequency conversion assembly for receiving frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321577100.1U CN220190863U (en) | 2023-06-20 | 2023-06-20 | Frequency conversion assembly for receiving frequency converter |
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| Publication Number | Publication Date |
|---|---|
| CN220190863U true CN220190863U (en) | 2023-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321577100.1U Active CN220190863U (en) | 2023-06-20 | 2023-06-20 | Frequency conversion assembly for receiving frequency converter |
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|---|---|
| CN (1) | CN220190863U (en) |
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2023
- 2023-06-20 CN CN202321577100.1U patent/CN220190863U/en active Active
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