CN210629429U - C-band down converter with stable output amplitude - Google Patents
C-band down converter with stable output amplitude Download PDFInfo
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- CN210629429U CN210629429U CN201921739624.XU CN201921739624U CN210629429U CN 210629429 U CN210629429 U CN 210629429U CN 201921739624 U CN201921739624 U CN 201921739624U CN 210629429 U CN210629429 U CN 210629429U
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Abstract
The utility model provides a C wave band down converter with stable output amplitude, which comprises a microprocessor, an excitation source, a local oscillator module, a logarithm detection module, a frequency mixing module and an attenuator; the excitation source is electrically connected with the microprocessor and the frequency mixing module; the microprocessor is electrically connected with the local oscillation module, the logarithm detection module and the attenuator; the local oscillation module is electrically connected with the frequency mixing module; the logarithmic detection module is electrically connected with the frequency mixing module; the frequency mixing module is electrically connected with the attenuator; the output end of the attenuator is used as the output end of the frequency converter. The utility model provides a C wave band down converter with stable output amplitude, which sets the frequency and power to be output by the converter through a microprocessor and connects the frequency and power to an excitation source; the local oscillator module is used for generating local oscillator signals required by the frequency mixing module, breaking through the potential barrier of the frequency mixing diode and avoiding frequency mixing distortion; the logarithmic detection module collects power and frequency of each frequency band, and the attenuator stabilizes level output according to the collected power and frequency to reach +/-1.5 db.
Description
Technical Field
The invention relates to the technical field of signal processing, in particular to a C-band down converter with stable output amplitude.
Background
At present, a full-band receiver is a common device, but the receiving range of the full-band receiver is limited and generally does not exceed 1G, so that a C-band down converter with stable output amplitude is provided. The technical characteristic is that all modules are controlled in a centralized way, a closed loop is formed in the modules, automatic amplitude control and automatic level tracking are realized, and the processing of the next-stage signal is guaranteed.
The existing main frequency converter is composed of a frequency mixer, usually an RF frequency mixer integrating a PLL/VCO, belongs to an active frequency mixer, and is characterized by having a high dynamic range, a high frequency conversion range, a low local oscillator input, an integrated phase-locked loop PLL and a voltage-controlled oscillator VCO, so that the circuit design is simplified to the maximum extent, and the cost is effectively controlled.
Disclosure of Invention
The invention provides a C-band down converter with stable output amplitude, aiming at overcoming the technical defects that the working frequency of the existing frequency converter can only reach 4GHz, the output level is not linear, the working bandwidth is narrow, the working frequency is low, and the harmonic waves are more.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a C-band down converter with stable output amplitude comprises a microprocessor, an excitation source, a local oscillation module, a logarithm detection module, a frequency mixing module and an attenuator; wherein:
the output end of the excitation source is electrically connected with the input end of the microprocessor and the input end of the frequency mixing module respectively;
the output end of the microprocessor is electrically connected with the input end of the local oscillation module, the input end of the logarithmic detection module and the signal control end of the attenuator;
the output end of the local oscillation module is electrically connected with the local oscillation port of the frequency mixing module;
the output end of the logarithmic detection module is electrically connected with the output end of the frequency mixing module;
the output end of the frequency mixing module is electrically connected with the signal input end of the attenuator;
and the signal output end of the attenuator is used as the output end of the frequency converter.
In the scheme, a worker sets the frequency and the power to be output by the frequency converter through the microprocessor and accesses the excitation source; the local oscillator module is used for generating local oscillator signals required by the frequency mixing module, breaking through the potential barrier of the frequency mixing diode and avoiding frequency mixing distortion; the logarithmic detection module collects power and frequency of each frequency band, and the attenuator stabilizes level output according to the collected power and frequency to reach +/-1.5 db.
The frequency converter also comprises a wireless communication module, and the wireless communication module is electrically connected with the microprocessor; the wireless communication module is in wireless communication connection with an external upper computer.
In the scheme, the wireless communication module is a channel for connecting the frequency converter with the upper computer and provides a data transmission function; and a control instruction is issued by an external upper computer and is transmitted to equipment connected with the frequency converter by a wireless communication module, so that the equipment is controlled.
The frequency converter also comprises two filtering modules; wherein:
the output end of the excitation source is electrically connected with the input end of the frequency mixing module through the filtering module;
the output end of the frequency mixing module is electrically connected with the output end of the logarithmic detection module through the filtering module.
In the above scheme, through the setting of the filtering module, the interference signal is filtered, and the signal required to be used is reserved, so that the integral signal-to-noise ratio of the frequency converter is improved.
The filtering module adopts an LC resonance filter.
The frequency converter also comprises a power amplification module; and the signal generated by the output end of the local oscillator module is input into the local oscillator port of the frequency mixing module after being amplified by the power amplification module.
In the above scheme, the strength of the local oscillator signal is related to whether the frequency converter is subjected to frequency mixing distortion, and the local oscillator signal generated at the output end of the local oscillator module is amplified through the power amplification module, so that the technical defect that the frequency mixing distortion and even the frequency mixing cannot be directly caused because the local oscillator signal is insufficient to provide energy for the frequency mixer to break through the potential barrier of the frequency mixing diode is further overcome.
The frequency converter further comprises a power calibration module; the input end of the power calibration module is electrically connected with the signal output end of the attenuator; the output end of the power calibration module is electrically connected with the input end of the microprocessor.
In the scheme, the power calibration module monitors the level of the signal output end of the attenuator in real time and transmits data back to the microprocessor to form a closed loop structure; and the microprocessor controls the attenuator to correct the output level through comparison, so that the self-calibration function is realized.
The local oscillation module adopts an integrated phase-locked loop chip, and a voltage-controlled oscillator VCO in the integrated phase-locked loop chip generates a local oscillation signal.
Wherein, the microprocessor adopts STM32F103C8T6 singlechip.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention provides a C-band down converter with stable output amplitude, which sets the frequency and power to be output by the converter through a microprocessor and is connected to an excitation source; the local oscillator module is used for generating local oscillator signals required by the frequency mixing module, breaking through the potential barrier of the frequency mixing diode and avoiding frequency mixing distortion; the logarithmic detection module collects power and frequency of each frequency band, and the attenuator stabilizes level output according to the collected power and frequency to reach +/-1.5 db.
Drawings
Fig. 1 is a schematic diagram of a C-band down converter module connection.
Wherein: 1. a microprocessor; 2. an excitation source; 3. a local oscillation module; 4. a logarithmic detection module; 5. a frequency mixing module; 6. an attenuator; 7. a wireless communication module; 8. a filtering module; 9. a power amplification module; 10. and a power calibration module.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, a C-band down converter with stable output amplitude includes a microprocessor 1, an excitation source 2, a local oscillation module 3, a logarithmic detection module 4, a frequency mixing module 5, and an attenuator 6; wherein:
the output end of the excitation source 2 is electrically connected with the input end of the microprocessor 1 and the input end of the frequency mixing module 5 respectively;
the output end of the microprocessor 1 is electrically connected with the input end of the local oscillation module 3, the input end of the logarithm detection module 4 and the signal control end of the attenuator 6;
the output end of the local oscillation module 3 is electrically connected with the local oscillation port of the frequency mixing module 5;
the output end of the logarithmic detection module 4 is electrically connected with the output end of the frequency mixing module 5;
the output end of the frequency mixing module 5 is electrically connected with the signal input end of the attenuator 6;
and the signal output end of the attenuator 6 is used as the output end of the frequency converter.
In the specific implementation process, a worker sets the frequency and the power to be output by the frequency converter through the microprocessor 1 and accesses the excitation source 2; the local oscillation module 3 is used for generating local oscillation signals required by the frequency mixing module 5, breaking through the potential barrier of the frequency mixing diode and avoiding frequency mixing distortion; the logarithmic detection module 4 collects power and frequency of each frequency band, and the attenuator 6 stabilizes level output according to the collected power and frequency to reach +/-1.5 db.
More specifically, the frequency converter further comprises a wireless communication module 7, and the wireless communication module 7 is electrically connected with the microprocessor 1; the wireless communication module 7 is in wireless communication connection with an external upper computer.
In the specific implementation process, the wireless communication module 7 is a channel for connecting the frequency converter with an upper computer and provides a data transmission function; and a control instruction is issued by an external upper computer and is transmitted to equipment connected with the frequency converter by the wireless communication module 7, so that the equipment is controlled.
More specifically, the frequency converter further comprises two filtering modules 8, and the number of the filtering modules 8 is two; wherein:
the output end of the excitation source 2 is electrically connected with the input end of the frequency mixing module 5 through the filtering module 8;
the output end of the frequency mixing module 5 is electrically connected with the output end of the logarithmic detection module 4 through the filtering module 8.
In the specific implementation process, the interference signals are filtered through the arrangement of the filtering module 8, the signals required to be used are reserved, and the integral signal-to-noise ratio of the frequency converter is improved.
More specifically, the filtering module 8 employs an LC resonant filter.
More specifically, the frequency converter further includes a power amplification module 9; and the signal generated by the output end of the local oscillator module 3 is input into the local oscillator port of the frequency mixing module 5 after being amplified by the power amplification module 9.
In the specific implementation process, the strength of the local oscillator signal is related to whether the frequency converter is subjected to frequency mixing distortion, the local oscillator signal generated at the output end of the local oscillator module 3 is amplified through the power amplification module 9, and the technical defect that the frequency mixing distortion and even the frequency mixing cannot be directly caused because the local oscillator signal is insufficient to provide energy for the frequency mixer to break through the potential barrier of the frequency mixing diode is further overcome.
Example 2
More specifically, on the basis of embodiment 1, the frequency converter further includes a power calibration module 10; the input end of the power calibration module 10 is electrically connected with the signal output end of the attenuator 6; the output end of the power calibration module 10 is electrically connected with the input end of the microprocessor 1.
In the specific implementation process, the power calibration module 10 monitors the level of the signal output end of the attenuator 6 in real time, and transmits data back to the microprocessor 1 to form a closed loop structure; the microprocessor 1 controls the attenuator 6 to correct the output level through comparison, thereby realizing the self-calibration function.
More specifically, the local oscillation module 3 uses an integrated phase-locked loop chip, and a voltage-controlled oscillator VCO in the integrated phase-locked loop chip generates the local oscillation signal.
In a specific implementation process, the microprocessor 1 adopts an STM32F103C8T6 singlechip; the integrated phase-locked loop chip is an HMC833 chip.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. The utility model provides a C wave band down converter of steady amplitude of area output which characterized in that: the system comprises a microprocessor (1), an excitation source (2), a local oscillator module (3), a logarithmic detection module (4), a frequency mixing module (5) and an attenuator (6); wherein:
the output end of the excitation source (2) is electrically connected with the input end of the microprocessor (1) and the input end of the frequency mixing module (5) respectively;
the output end of the microprocessor (1) is electrically connected with the input end of the local oscillation module (3), the input end of the logarithmic detection module (4) and the signal control end of the attenuator (6);
the output end of the local oscillation module (3) is electrically connected with the local oscillation port of the frequency mixing module (5);
the output end of the logarithmic detection module (4) is electrically connected with the output end of the frequency mixing module (5);
the output end of the frequency mixing module (5) is electrically connected with the signal input end of the attenuator (6);
and the signal output end of the attenuator (6) is used as the output end of the frequency converter.
2. The C-band downconverter of claim 1 with output fixed amplitude, wherein: the wireless communication module (7) is further included, and the wireless communication module (7) is electrically connected with the microprocessor (1); the wireless communication module (7) is in wireless communication connection with an external upper computer.
3. The C-band downconverter of claim 2 with output fixed amplitude, wherein: the device also comprises two filtering modules (8), wherein two filtering modules (8) are arranged; wherein:
the output end of the excitation source (2) is electrically connected with the input end of the frequency mixing module (5) through the filtering module (8);
the output end of the frequency mixing module (5) is electrically connected with the output end of the logarithmic detection module (4) through the filtering module (8).
4. The C-band downconverter of claim 3 with output fixed amplitude, wherein: the filtering module (8) adopts an LC resonance filter.
5. The C-band down converter with output amplitude stabilization of claim 4, wherein: the power amplifier also comprises a power amplification module (9); and the signal generated by the output end of the local oscillator module (3) is amplified by the power amplification module (9) and then input into the local oscillator port of the frequency mixing module (5).
6. The C-band down converter with output amplitude stabilization according to any one of claims 1 to 5, characterized in that: further comprising a power calibration module (10); the input end of the power calibration module (10) is electrically connected with the signal output end of the attenuator (6); the output end of the power calibration module (10) is electrically connected with the input end of the microprocessor (1).
7. The C-band down converter with output amplitude stabilization of claim 6, wherein: the local oscillation module (3) adopts an integrated phase-locked loop chip, and a voltage-controlled oscillator VCO in the integrated phase-locked loop chip generates a local oscillation signal.
8. The C-band downconverter of claim 7 with output fixed amplitude, wherein: and the microprocessor (1) adopts an STM32F103C8T6 singlechip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921739624.XU CN210629429U (en) | 2019-10-16 | 2019-10-16 | C-band down converter with stable output amplitude |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921739624.XU CN210629429U (en) | 2019-10-16 | 2019-10-16 | C-band down converter with stable output amplitude |
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| Publication Number | Publication Date |
|---|---|
| CN210629429U true CN210629429U (en) | 2020-05-26 |
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| CN201921739624.XU Active CN210629429U (en) | 2019-10-16 | 2019-10-16 | C-band down converter with stable output amplitude |
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| CN (1) | CN210629429U (en) |
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- 2019-10-16 CN CN201921739624.XU patent/CN210629429U/en active Active
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