CN203027214U - Radio-frequency adjustable attenuator - Google Patents
Radio-frequency adjustable attenuator Download PDFInfo
- Publication number
- CN203027214U CN203027214U CN 201320006801 CN201320006801U CN203027214U CN 203027214 U CN203027214 U CN 203027214U CN 201320006801 CN201320006801 CN 201320006801 CN 201320006801 U CN201320006801 U CN 201320006801U CN 203027214 U CN203027214 U CN 203027214U
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- attenuator
- adjustable attenuator
- pin diode
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Abstract
The utility model provides a radio-frequency adjustable attenuator relating to the field of the attenuator. The radio-frequency adjustable attenuator comprises four PIN diodes; the cathodes of the two PIN diodes are connected to form a first public end, and the anodes of the two PIN diodes are respectively correspondingly connected with the anodes of the other two PIN diodes to form two connected circuits, respectively a first circuit and a second circuit; the cathodes of the other two PIN diodes are connected to form a second public end; the first circuit and the second circuit are respectively connected with a choke inductor; the first public end is connected with a radio-frequency input signal; and the second public end is connected with a radio-frequency output signal. The radio-frequency adjustable attenuator disclosed by the utility model has a simple structure and a large attenuation value, can restrain generation of distortion of even number of signals, realizes a symmetrical attenuation network, and simplifies a bias network.
Description
Technical field
The utility model relates to the attenuator field, specially refers to a kind of radio frequency attenuator.
Background technology
Attenuator application is in various communication applications, and for example attenuator can be used to control the signal level of transceiver, and in many Modern Communication System, high linearity is the requirement of a key especially.
General two parallel resistances and the series resistance of adopting of existing attenuator consists of the attenuator that a PI configures fixed voltage, the I/O that can mate concrete application circuit characteristic impedance impedance need to be provided simultaneously, in the situation that operating frequency is higher than attenuator ring frequency, it is practical that PIN diode can be used as the Current Control variable resistor, but only operating frequency fully higher than the condition of diode cutoff frequency under this Current Control variable resistance model just more accurate.Therefore existing attenuator adopts the characteristic of PIN diode easily to be subject to the operating frequency impact and becomes very complicated.
The utility model content
The technical problem to be solved in the present invention is to provide radio frequency attenuator, and this utility model replaces the series resistance of original attenuation device by the diode of two complete reversal connections, make its Performance Ratio better in the past, and its attenuation network is symmetrical.
Be achieved through the following technical solutions above-mentioned purpose:
The radio frequency adjustable attenuator, comprise four PIN diode, the negative electrode of two described PIN diode is connected to become the first common port, its anode respectively with the corresponding connection of anode of two other PIN diode, consist of the circuit of two connections, be respectively the first circuit and the second circuit, the negative electrode of two other PIN diode is connected to become the second common port, connecing respectively a choke induction on the first circuit He on the second circuit, connect radio-frequency input signals on described the first common port, connect the radio frequency output signal on described the second common port.Two described negative electrodes arrange respectively a coupling capacitance.
The beneficial effects of the utility model are: the utility model adopts two fixed resistances in diodes replacement PI circuit, construct a variable attenuator, have the following advantages: 1, series diode has condensance two and makes the isolation of network and other parts, replaces a resistance can improve the maximum attenuation value or makes upper frequency limit double under the condition of pad value necessarily with two diodes.2, replacing two diodes of series resistance is 180 reversal connections, has so just suppressed the generation, 3 of the inferior signal distortion of even number, the attenuator network that obtains thus is symmetrical, can simplify bias network.
Description of drawings
Fig. 1 is circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated:
As shown in Figure 1, the radio frequency adjustable attenuator, comprise four PIN diode, the negative electrode of two described PIN diode is connected to become the first common port 3, its anode respectively with the corresponding connection of anode of two other PIN diode, consist of the circuit of two connections, be respectively the first circuit 1 and the second circuit 2, the negative electrode of two other PIN diode is connected to become the second common port 4, connecing respectively a choke induction on the first circuit 1 He on the second circuit 2, connect radio-frequency input signals on described the first common port 3, connect the radio frequency output signal on described the second common port 4.Two described negative electrodes arrange respectively a coupling capacitance.
The radio frequency adjustable attenuator is mainly by two PIN diode groups (U1, U2) and respective peripheral the electric circuit constitute.In figure, C2, C3 are RF-coupled electric capacity, improve the isolation that turn-offs.C2 one end is connected with radio-frequency input signals, and the other end is connected with the first common port 3; C3 one end is connected with the second common port 4, and the other end is connected with the radiofrequency signal end of outgoing.L1, L2 are choke induction, L1 is identical with the L2 resistance value, L1 connects an end of variable voltage, the other end is connected on the first circuit 1, and in figure, the B point voltage is that variable voltage is added in the voltage on attenuator, and the end of L2 is connected with fixed voltage, the other end is connected with the second circuit 2, in figure, the A point voltage is fixed voltage, and the two ends that A the is ordered resistance of connecting respectively, its resistance are received on the anode of PIN diode on both sides.R1, R2, R3, R4 are the current limliting biasing resistor, and R5, R6 are potential-divider network resistance, and C1, C4, C5, C6, C7 are filter capacitor.Above components and parts form the peripheral circuit of PIN diode, and logical superpotential control changes the PIN knot of diode inside, thereby produces the differential declines value.As figure, during higher than the A point voltage, attenuator does not produce decay when the B point voltage, and during less than the A point voltage, attenuator produces corresponding pad value when the B point voltage, and the B point voltage is less, decays larger.
The utility model adopts two fixed resistances in diodes replacement PI circuit, construct a variable attenuator, have the following advantages: 1, series diode has condensance two and makes the isolation of network and other parts, replaces a resistance can improve the maximum attenuation value or makes upper frequency limit double under the condition of pad value necessarily with two diodes.2, replacing two diodes of series resistance is 180 degree reversal connections, has so just suppressed the generation of even number time signal distortion.3, the attenuator network that obtains thus is symmetrical, can simplify bias network.
The above is not that this novel technical scope is imposed any restrictions, and all any modification, equivalent variations and modifications of above embodiment being done according to the utility model technical spirit all still belong in the scope of this novel technical scheme.
Claims (2)
1. radio frequency adjustable attenuator, it is characterized in that, comprise four PIN diode, the negative electrode of two described PIN diode is connected to become the first common port, its anode respectively with the corresponding connection of anode of two other PIN diode, consist of the circuit of two connections, be respectively the first circuit and the second circuit, the negative electrode of two other PIN diode is connected to become the second common port, connecing respectively a choke induction on the first circuit He on the second circuit, connect radio-frequency input signals on described the first common port, connect the radio frequency output signal on described the second common port.
2. radio frequency adjustable attenuator according to claim 1, is characterized in that, two described negative electrodes arrange respectively a coupling capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320006801 CN203027214U (en) | 2013-01-05 | 2013-01-05 | Radio-frequency adjustable attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320006801 CN203027214U (en) | 2013-01-05 | 2013-01-05 | Radio-frequency adjustable attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203027214U true CN203027214U (en) | 2013-06-26 |
Family
ID=48651157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320006801 Expired - Fee Related CN203027214U (en) | 2013-01-05 | 2013-01-05 | Radio-frequency adjustable attenuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203027214U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410809A (en) * | 2014-10-30 | 2015-03-11 | 成都康特电子高新科技有限责任公司 | Level attenuator based on broadcast television network system |
| CN104579236A (en) * | 2015-01-27 | 2015-04-29 | 南京国博电子有限公司 | Unsymmetrical microwave digital attenuator circuit and control method thereof |
| CN112924941A (en) * | 2021-01-28 | 2021-06-08 | 中国船舶重工集团公司第七二三研究所 | Ku wave band tracking radar radio frequency STC circuit |
| CN113315484A (en) * | 2021-05-31 | 2021-08-27 | 广州市迪士普音响科技有限公司 | Wireless broadcast exciter and PIN attenuation circuit |
-
2013
- 2013-01-05 CN CN 201320006801 patent/CN203027214U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410809A (en) * | 2014-10-30 | 2015-03-11 | 成都康特电子高新科技有限责任公司 | Level attenuator based on broadcast television network system |
| CN104579236A (en) * | 2015-01-27 | 2015-04-29 | 南京国博电子有限公司 | Unsymmetrical microwave digital attenuator circuit and control method thereof |
| CN112924941A (en) * | 2021-01-28 | 2021-06-08 | 中国船舶重工集团公司第七二三研究所 | Ku wave band tracking radar radio frequency STC circuit |
| CN113315484A (en) * | 2021-05-31 | 2021-08-27 | 广州市迪士普音响科技有限公司 | Wireless broadcast exciter and PIN attenuation circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130626 Termination date: 20160105 |