CN207099043U - A kind of small stepping numerical-control attenuator - Google Patents
A kind of small stepping numerical-control attenuator Download PDFInfo
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- CN207099043U CN207099043U CN201721059326.7U CN201721059326U CN207099043U CN 207099043 U CN207099043 U CN 207099043U CN 201721059326 U CN201721059326 U CN 201721059326U CN 207099043 U CN207099043 U CN 207099043U
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Abstract
The utility model discloses a kind of small stepping numerical-control attenuator, including first switch attenuation module, VVA, operational amplifier, digital analog converter, temperature sensor, programmable controller and second switch attenuation module, the output end of first switch attenuation module and the input of VVA connect, the input of digital analog converter and the output end of programmable controller connect, the output end of digital analog converter and the input of operational amplifier connect, the output end of operational amplifier and the input of VVA connect, the input of temperature sensor and programmable controller connects, first switch attenuation module, the control terminal of second switch attenuation module and the output end of programmable controller connect, the output end of VVA is connected with the input of second switch attenuation module.The utility model realizes the system attenuation error caused by temperature-compensating changes, and improves the stability of system, meets user's request.
Description
Technical field
It the utility model is related to technical field of micro communication, more particularly to a kind of small stepping numerical-control attenuator.
Background technology
Attenuator is a kind of energy loss RF/Microwave element, and element internal contains resistive material, mainly met the tendency of
The fields such as Aeronautics and Astronautics, radar, electronic reconnaissance and confrontation.Part radio communication management user wishes can when attenuator uses
Attenuation is adjusted according to demand, the fixed value but current ordinary attenuators on the market can only decay, can not meet user's request.
Utility model content
The purpose of this utility model is overcome the deficiencies in the prior art, there is provided a kind of small stepping numerical-control attenuator, it is carried
The high stability of system, meets user's request.
The technical solution of the utility model is as follows：A kind of small stepping numerical-control attenuator, including first switch attenuation module, can
Time variant voltage attenuator, operational amplifier, digital analog converter, temperature sensor and programmable controller；The first switch decay
The input of module is used to receive radio-frequency input signals, and output end and the variable voltage of the first switch attenuation module decline
Subtract the input connection of device, the input of the digital analog converter is connected with the output end of the programmable controller, the number
The output end of weighted-voltage D/A converter is connected with the input of the operational amplifier, the output end of the operational amplifier with it is described variable
The input connection of voltage attenuator, the temperature sensor are connected with the input of the programmable controller, and described first
The control terminal of switch attenuator module is connected with the output end of the programmable controller, and the programmable controller is additionally operable to receive
Attenuation control signal；Also include second switch attenuation module, the output end of the VVA and the second switch
The input connection of attenuation module, the control terminal of the second switch attenuation module connect with the output end of the programmable controller
Connect, the output end of the second switch attenuation module is used to export radio frequency output signal.
Further, the first switch attenuation module includes two groups of fixed attenuations combinations, two groups of fixed attenuation groups
It is respectively the combination of the first 40dB fixed attenuations and the combination of 20dB fixed attenuations to close, and the second switch attenuation module includes second
40dB fixed attenuations combine.
Further, the first 40dB fixed attenuations combination, the 2nd 40dB fixed attenuation combining structures are identical, include
Two one-to-two switches and 40dB attenuators, described two one-to-two switched fabrics, and be connected respectively with 40dB attenuators；It is described
The combination of 20dB fixed attenuations includes two one-to-two switches and 20dB attenuators, described two one-to-two switched fabrics, and difference
It is connected with 20dB attenuators；One of one-to-two switch input radio frequency input letter of the first 40dB fixed attenuations combination
Number, another one-to-two switch is connected to one of one-to-two switch of 20dB fixed attenuations combination, and the 20dB, which is fixed, to decline
Another one-to-two switch for subtracting combination is sequentially connected with wherein the one of VVA and the combination of the 2nd 40dB fixed attenuations
Individual one-to-two switch, another one-to-two switch output radio frequency output signal of the 2nd 40dB fixed attenuations combination, respectively
Individual a two switch is all connected to programmable controller.
Further, the attenuation range of the VVA is 0~17dB.
Further, the programmable controller is FPGA programmable controllers or CPLD programmable controllers.
Further, the attenuation control signal is binary system control code.
Relative to prior art, the beneficial effects of the utility model are：The utility model passes through three groups of fixed attenuators
100dB fixed attenuation amounts are realized, the different temperature informations collected are sent to programmable controller, can compiled by temperature sensor
Range controller determines switch selection signal according to the temperature information and adjustable attenuation information that receive, and then controls three groups of fixations to decline
Subtract the switch connection of device, input is to VVA after the decay of first switch attenuation module for radio-frequency input signals, simultaneously
Programmable controller passes through operational amplifier to digital analog converter output control signal after digital analog converter carries out digital-to-analogue conversion
Amplification input is into VVA, to change the attenuation of VVA, realizes because temperature-compensating changes
Caused system attenuation error, improves the stability of system, meets user's request.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
It refer to Fig. 1, a kind of small stepping numerical-control attenuator provided by the utility model, including first switch attenuation module,
VVA, operational amplifier, digital analog converter, temperature sensor and programmable controller；First switch decay mode
The input of block is used to receive radio-frequency input signals, the output end of first switch attenuation module and the input of VVA
End connection, the input of digital analog converter and the output end of programmable controller connect, the output end of digital analog converter and computing
The input connection of amplifier, the output end of operational amplifier and the input of VVA connect, temperature sensor
It is connected with the input of programmable controller, the control terminal of first switch attenuation module and the output end of programmable controller connect
Connect, programmable controller is additionally operable to receiving attenuation control signal, and the attenuation control signal is binary system control code；Also include second
Switch attenuator module, the output end of VVA are connected with the input of second switch attenuation module, and second switch declines
Subtract the control terminal of module and the output end of programmable controller connects, the output end of second switch attenuation module is used to export radio frequency
Output signal.
First switch attenuation module includes two groups of fixed attenuations and combined, and two groups of fixed attenuation combinations are respectively the first 40dB
Fixed attenuation combines and the combination of 20dB fixed attenuations, second switch attenuation module combine including the 2nd 40dB fixed attenuations.Wherein,
The combination of first 40dB fixed attenuations, the 2nd 40dB fixed attenuation combining structures are identical, including two one-to-two switches and 40dB
Attenuator, two one-to-two switched fabrics, and be connected respectively with 40dB attenuators；The combination of 20dB fixed attenuations includes two one point
Two switches and 20dB attenuators, two one-to-two switched fabrics, and be connected respectively with 20dB attenuators；First 40dB fixed attenuations
One of one-to-two switch input radio frequency input signal of combination, another one-to-two switch are connected to 20dB fixed attenuation groups
The one of one-to-two switch closed, another one-to-two switch of 20dB fixed attenuations combination are sequentially connected with variable voltage decay
Device and the 2nd 40dB fixed attenuations combination one of one-to-two switch, the 2nd 40dB fixed attenuations combination another one
Divide two switch output radio frequency output signals, each a two switch is all connected to programmable controller.Declined by three groups of fixations
Subtracting device realizes 100dB fixed attenuation amounts.
In the present embodiment, the attenuation range of VVA is 0~17dB.
In the present embodiment, programmable controller is FPGA programmable controllers or CPLD programmable controllers.
The principle of the present embodiment is as follows：Temperature sensor sends the different temperature informations collected to PLC technology
Device, programmable controller determines switch selection signal according to the temperature information and adjustable attenuation information that receive, and then controls three
The switch connection of group fixed attenuator, radio-frequency input signals input to variable voltage after the decay of first switch attenuation module are decayed
Device, while programmable controller passes through fortune to digital analog converter output control signal after digital analog converter carries out digital-to-analogue conversion
Amplifier amplification input is calculated into VVA, to change the attenuation of VVA, is realized because of temperature
System attenuation error caused by compensation change, improves the stability of system, meets user's request.
Preferred embodiment of the present utility model is these are only, is not limited to the utility model, it is all in this practicality
All any modification, equivalent and improvement made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (6)
- A kind of 1. small stepping numerical-control attenuator, it is characterised in that：Including first switch attenuation module, VVA, fortune Calculate amplifier, digital analog converter, temperature sensor and programmable controller；The input of the first switch attenuation module is used for Radio-frequency input signals is received, the output end of the first switch attenuation module connects with the input of the VVA Connect, the input of the digital analog converter is connected with the output end of the programmable controller, the output of the digital analog converter End is connected with the input of the operational amplifier, and the output end of the operational amplifier is defeated with the VVA Enter end connection, the temperature sensor is connected with the input of the programmable controller, the first switch attenuation module Control terminal is connected with the output end of the programmable controller, and the programmable controller is additionally operable to receiving attenuation control signal； Also include second switch attenuation module, the input of the output end of the VVA and the second switch attenuation module End connection, the control terminal of the second switch attenuation module are connected with the output end of the programmable controller, and described second opens The output end for closing attenuation module is used to export radio frequency output signal.
- A kind of 2. small stepping numerical-control attenuator according to claim 1, it is characterised in that：The first switch attenuation module Combined including two groups of fixed attenuations, two groups of fixed attenuations combination is respectively that the combination of the first 40dB fixed attenuations and 20dB are fixed Decay combination, the second switch attenuation module combine including the 2nd 40dB fixed attenuations.
- A kind of 3. small stepping numerical-control attenuator according to claim 2, it is characterised in that：The first 40dB fixed attenuations Combination, the 2nd 40dB fixed attenuation combining structures are identical, including two one-to-two switch and 40dB attenuators, described two one Divide two switched fabrics, and be connected respectively with 40dB attenuators；20dB fixed attenuations combination include two one-to-two switches and 20dB attenuators, described two one-to-two switched fabrics, and be connected respectively with 20dB attenuators；The first 40dB fixed attenuations One of one-to-two switch input radio frequency input signal of combination, another one-to-two switch are connected to 20dB fixed attenuation groups The one of one-to-two switch closed, another one-to-two switch of the 20dB fixed attenuations combination are sequentially connected with variable voltage Attenuator and one of one-to-two switch of the 2nd 40dB fixed attenuations combination, the 2nd 40dB fixed attenuations combine another One one-to-two switch output radio frequency output signal, each a two switch are all connected to programmable controller.
- A kind of 4. small stepping numerical-control attenuator according to claim 1, it is characterised in that：The VVA Attenuation range is 0~17dB.
- A kind of 5. small stepping numerical-control attenuator according to claim 1, it is characterised in that：The programmable controller is FPGA programmable controllers or CPLD programmable controllers.
- A kind of 6. small stepping numerical-control attenuator according to claim 1, it is characterised in that：The attenuation control signal is two System control code.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721059326.7U CN207099043U (en) | 2017-08-21 | 2017-08-21 | A kind of small stepping numerical-control attenuator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721059326.7U CN207099043U (en) | 2017-08-21 | 2017-08-21 | A kind of small stepping numerical-control attenuator |
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| Publication Number | Publication Date |
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| CN207099043U true CN207099043U (en) | 2018-03-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023010732A1 (en) * | 2021-08-04 | 2023-02-09 | 国仪量子(合肥)技术有限公司 | Temperature compensation broadband signal attenuation circuit and control method thereof |
-
2017
- 2017-08-21 CN CN201721059326.7U patent/CN207099043U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023010732A1 (en) * | 2021-08-04 | 2023-02-09 | 国仪量子(合肥)技术有限公司 | Temperature compensation broadband signal attenuation circuit and control method thereof |
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