CN207184435U - A kind of C-band numerical-control attenuator - Google Patents
A kind of C-band numerical-control attenuator Download PDFInfo
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- CN207184435U CN207184435U CN201720876527.XU CN201720876527U CN207184435U CN 207184435 U CN207184435 U CN 207184435U CN 201720876527 U CN201720876527 U CN 201720876527U CN 207184435 U CN207184435 U CN 207184435U
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- control attenuator
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Abstract
The utility model discloses a kind of C-band numerical-control attenuator, mainly solve to set present in prior art single-pole double-throw switch (SPDT) increase circuit loss, annex phase it is higher, using it is limited the problems such as.It is connected on 6 diode D1 to diode D6 of radio frequency input respectively including positive electrode, latter terminating diode D1 negative electrodes in parallel and the electric capacity C1 of other end ground connection, electric capacity C2 and resistance R1, latter terminating diode D6 negative electrodes in parallel and the electric capacity C3 of other end ground connection, electric capacity C4 and resistance R2, it is connected to radio frequency output, for providing bias current and monitoring the DA conversion chips of control voltage point needed for any attenuation state, the CPLD programmable logic devices being connected on DA conversion chips, and it is connected with CPLD programmable logic devices, for producing the CTL complementary transistor logic gates of digital controlled signal.The utility model has the characteristics that cost is cheap, attenuation accuracy is high, loss is low, fault rate is low, applied widely, has very high practical value and promotional value in electronic device field.
Description
Technical field
Electronic device field is the utility model is related to, especially a kind of C-band numerical-control attenuator.
Background technology
Attenuator is a kind of electronic component for providing decay, is divided into：Fixed attenuator and variable attenuator, are mainly used in
Signal magnitude in adjustment circuit；In comparative method for measuring circuit, the pad value that direct-reading is tested network can be used to；Furthermore it is used for
Improve impedance matching, to meet the needs of multiport is to level, be widely used in electronic equipment.
At present, traditional C-band numerical-control attenuator, one or more groups of hilted broadswords are added using monolithic integrated numerical-control attenuator more
The mode of commutator switching decay realizes the high dynamic decay of multidigit control, and this design is disadvantageous in that, sets hilted broadsword
Commutator causes circuit loss to increase, and insertion loss is reachable in 7dB or so, and its additional phase shift is higher, when the numerical control declines
When subtracting the additional phase shift of device and reaching 50 °, its application is limited.
Utility model content
The purpose of this utility model is to provide a kind of C-band numerical-control attenuator mainly solve present in prior art
Set single-pole double-throw switch (SPDT) to increase circuit loss, insertion loss is high, and annex phase is higher, using it is limited the problems such as.
To achieve these goals, the technical solution adopted in the utility model is as follows：
A kind of C-band numerical-control attenuator, including positive electrode be connected on respectively radio frequency input and be arranged in order diode D1, two
Pole pipe D2, diode D3, diode D4, diode D5 and diode D6, latter terminating diode D1 negative electrodes in parallel and another
Electric capacity C1, electric capacity C2 and the resistance R1 of end ground connection, latter terminating diode D6 negative electrodes in parallel and the electric capacity C3 of other end ground connection,
Electric capacity C4 and resistance R2, it is connected to radio frequency output, for providing control voltage needed for bias current and any attenuation state of monitoring
The DA conversion chips of point, the CPLD programmable logic devices being connected on DA conversion chips, and connect with CPLD programmable logic devices
Connect, the CTL complementary transistor logic gates for producing digital controlled signal.Wherein, CTL complementary transistors logic gate produces
Digital controlled signal be delivered to DA conversion chips after the number of CPLD programmable logic devices exhibition position, then be converted into through DA conversion chips
Analog voltage signal provides bias current for diode D1 to D6.
Further, diode D2 is grounded to diode D5 negative electrodes respectively.
Further, diode D1 to diode D6 model ADP2220-000, electric capacity C1 are to electric capacity C4 using electricity
Capacitance is 100pf chip capacity, and resistance R1 and resistance R2 resistance values are 1000 Ω.
The C-band radio frequency input of the attenuator uses 4~8GHz.
Compared with prior art, the utility model has the advantages that：
(1) the utility model reduces the component of transmission path, reduces energy consumption, it is transmitted using 6 diodes in parallel
Approach component is few, and path is short, and time-consuming short, insertion loss is low.
(2) bias current of the present utility model is provided by DA conversion chips, is easy to monitor control needed for any attenuation state
Electrical voltage point, its attenuation accuracy are greatly enhanced, and use range is wide.
(3) the utility model is when different control voltages realize differential declines, transmission path that radiofrequency signal is undergone etc.
It is long, it is reduced in the additional phase shift of differential declines state.
(4) component of the present utility model uses ripe part, and its low production cost, control mode is simple, is easy to adjust
Examination.The utility model has the characteristics that low production cost, attenuation accuracy are high, loss is low, fault rate is low, has a wide range of application,
Electronic device field has very high practical value and promotional value.
Brief description of the drawings
Fig. 1 is existing C ripples monolithic integrated numerical-control attenuator.
Fig. 2 is C ripples numerical-control attenuator of the present utility model.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples, and embodiment of the present utility model includes
But it is not limited to the following example.
Embodiment
As shown in figure 1, existing monolithic integrated numerical-control attenuator radio frequency input FRin is 4~8GHz, opened through single-pole double throw
To close SPDT and enter fixed attenuator Fixed Atten, four single-pole double-throw switch (SPDT)s and two fixed attenuators are passed through in radio frequency input,
Finally exported from numerical-control attenuator DAT.
As shown in Fig. 2 a kind of C-band numerical-control attenuator, including positive electrode are connected on 6 ADP2220- of radio frequency input respectively
000 diode D1 to D6, latter terminating diode D1 negative electrodes in parallel and 100pf electric capacity C1, the electric capacity C2 of other end ground connection and
100pf electric capacity C3, the electric capacity C4 and 1000 of 1000 Ω resistance R1, latter terminating diode D6 negative electrodes in parallel and other end ground connection
Ω resistance R2, it is connected to radio frequency output, the DA for providing control voltage point needed for bias current and any attenuation state of monitoring
Conversion chip, the CPLD programmable logic devices being connected on DA conversion chips, and be connected with CPLD programmable logic devices, be used for
Produce the CTL complementary transistor logic gates of digital controlled signal.
Further, diode D2 is grounded to diode D5 negative electrodes respectively.
Radio frequency inputs 4~8GHz waveforms, through diode D1 to D6, wherein, number caused by CTL complementary transistor logic gates
Word control signal is delivered to DA conversion chips after the number of CPLD programmable logic devices exhibition position, then is converted into simulating through DA conversion chips
Voltage signal provides bias current for diode D1 to D6.
Above-described embodiment is only preferred embodiment of the present utility model, not to the limitation of scope of protection of the utility model,
In every case design principle of the present utility model, and the change for carrying out non-creativeness work on this basis and making are used, all should
Belong within the scope of protection of the utility model.
Claims (4)
1. a kind of C-band numerical-control attenuator, it is characterised in that be connected on radio frequency input and be arranged in order two respectively including positive electrode
Pole pipe D1, diode D2, diode D3, diode D4, diode D5 and diode D6, latter terminating diode D1 negative electricity in parallel
Pole and electric capacity C1, electric capacity C2 and the resistance R1 of other end ground connection, latter terminating diode D6 negative electrodes in parallel and other end ground connection
Electric capacity C3, electric capacity C4 and resistance R2, be connected to radio frequency output, for providing needed for bias current and any attenuation state of monitoring
The DA conversion chips of control voltage point, the CPLD programmable logic devices being connected on DA conversion chips, and may be programmed with CPLD
Logic device connection, the CTL complementary transistor logic gates for producing digital controlled signal.
A kind of 2. C-band numerical-control attenuator according to claim 1, it is characterised in that the diode D2 to diode
D5 negative electrodes are grounded respectively.
3. a kind of C-band numerical-control attenuator according to claim 2, it is characterised in that the diode D1, diode
D2, diode D3, diode D4, diode D5 and diode D6 model ADP2220-000.
4. a kind of C-band numerical-control attenuator according to claim 3, it is characterised in that the electric capacity C1 is equal to electric capacity C4
Use chip capacity of the capacitance for 100pf；Resistance R1 and resistance the R2 resistance value is 1000 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720876527.XU CN207184435U (en) | 2017-07-18 | 2017-07-18 | A kind of C-band numerical-control attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720876527.XU CN207184435U (en) | 2017-07-18 | 2017-07-18 | A kind of C-band numerical-control attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207184435U true CN207184435U (en) | 2018-04-03 |
Family
ID=61737139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720876527.XU Active CN207184435U (en) | 2017-07-18 | 2017-07-18 | A kind of C-band numerical-control attenuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207184435U (en) |
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2017
- 2017-07-18 CN CN201720876527.XU patent/CN207184435U/en active Active
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