CN212343741U - Absorption type amplitude limiter - Google Patents
Absorption type amplitude limiter Download PDFInfo
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- CN212343741U CN212343741U CN202020499024.7U CN202020499024U CN212343741U CN 212343741 U CN212343741 U CN 212343741U CN 202020499024 U CN202020499024 U CN 202020499024U CN 212343741 U CN212343741 U CN 212343741U
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Abstract
The utility model is suitable for a radio technology field provides an absorption type amplitude limiter, including electric bridge, first amplitude limiting module, second amplitude limiting module, first load module and second load module; the input port of the bridge is the input port of the absorption type amplitude limiter, and the isolation port of the bridge is the output port of the absorption type amplitude limiter; the coupling output port of the bridge is connected with the input end of the first amplitude limiting module, the through output port of the bridge is connected with the input end of the second amplitude limiting module, the output end of the first amplitude limiting module is connected with the input end of the first load module, the output end of the second amplitude limiting module is connected with the input end of the second load module, and the first load module and the second load module are both grounded. The input port of a bridge is used as the input of the absorption type amplitude limiter, and the isolation port is used as the output of the absorption type amplitude limiter, so that the circuit structure is simplified, and the insertion loss and the leakage power are reduced.
Description
Technical Field
The utility model belongs to the technical field of the radio, especially, relate to an absorption formula clipper-limiter.
Background
The T/R component is a part between a video and an antenna in a wireless transceiving system, namely one end of the T/R component is connected with the antenna, and one end of the T/R component is connected with a middle video processing unit to form the wireless transceiving system; in addition, the electromagnetic environment of electronic equipment is becoming more and more complex at present, and the external interference and threat suffered are becoming more and more huge.
The limiter is a basic microwave element in a T/R assembly, and a traditional absorption limiter needs 2 3dB couplers, so that the circuit is complex, the insertion loss is large, and the leakage power is high.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides an absorption type limiter, so as to solve the problems of complicated circuit structure, large insertion loss and high leakage power of the absorption type limiter in the prior art.
The embodiment of the utility model provides an absorption formula clipper-limiter, include: the device comprises a bridge, a first amplitude limiting module, a second amplitude limiting module, a first load module and a second load module; the bridge comprises an input port, a through output port, an isolation port and a coupling output port;
the input port of the bridge is the input port of the absorption type amplitude limiter, and the isolation port of the bridge is the output port of the absorption type amplitude limiter;
the coupling output port of the bridge is connected with the input end of the first amplitude limiting module, the through output port of the bridge is connected with the input end of the second amplitude limiting module, the output end of the first amplitude limiting module is connected with the input end of the first load module, the output end of the second amplitude limiting module is connected with the input end of the second load module, and the first load module and the second load module are both grounded.
In one embodiment, the first clipping module includes a first diode and a second diode, a cathode of the first diode and an anode of the second diode are respectively connected to the input terminal of the first clipping module, and an anode of the first diode and a cathode of the second diode are respectively connected to the output terminal of the first clipping module.
In one embodiment, the first diode and the second diode are GAN PIN diodes.
In one embodiment, the second amplitude limiting module includes a third diode and a fourth diode, a cathode of the third diode and an anode of the fourth diode are respectively connected to the input terminal of the second amplitude limiting module, and an anode of the third diode and a cathode of the fourth diode are respectively connected to the output terminal of the second amplitude limiting module.
In one embodiment, the third diode and the fourth diode are GAN PIN diodes.
In one embodiment, the first load module includes a first resistor.
In one embodiment, the second load module includes a second resistor.
In one embodiment, the inductor further comprises a first inductor and a second inductor;
the first end of the first inductor is connected with the output end of the first amplitude limiting module, and the second end of the first inductor is grounded;
the first end of the second inductor is connected with the output end of the second amplitude limiting module, and the second end of the second inductor is grounded.
In one embodiment, the first inductor and the second inductor are both choke inductors.
In one embodiment, the bridge comprises a 3db bridge.
Compared with the prior art, the embodiment of the utility model beneficial effect who exists is: the embodiment provides an absorption type amplitude limiter, which comprises an electric bridge, a first amplitude limiting module, a second amplitude limiting module, a first load module and a second load module; the input port of the bridge is the input port of the absorption type amplitude limiter, and the isolation port of the bridge is the output port of the absorption type amplitude limiter; the coupling output port of the bridge is connected with the input end of the first amplitude limiting module, the through output port of the bridge is connected with the input end of the second amplitude limiting module, the output end of the first amplitude limiting module is connected with the input end of the first load module, the output end of the second amplitude limiting module is connected with the input end of the second load module, and the first load module and the second load module are both grounded. In the embodiment, the input port of the bridge is used as the input of the absorption type amplitude limiter, and the isolation port is used as the output of the absorption type amplitude limiter, so that the circuit structure is simplified, and the insertion loss and the leakage power are reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural diagram of an absorption type amplitude limiter according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an absorption type amplitude limiter according to an embodiment of the present invention;
fig. 3 is a simulation graph of an absorption type limiter in a small signal insertion loss state according to an embodiment of the present invention;
fig. 4 is a simulation graph of the absorption limiter according to the embodiment of the present invention in a large signal limiting state.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical solution of the present invention, the following description is made by using specific examples.
As shown in fig. 1, in an embodiment of the present invention, fig. 1 illustrates a structure of an absorption limiter provided in this embodiment, which includes:
a bridge 10, a first clipping module 20, a second clipping module 30, a first load module 40 and a second load module 50; the bridge 10 comprises an input port 12, a through output port 14, an isolation port 13 and a coupling output port 15;
the input port 12 of the bridge 10 is an input port of the absorption type amplitude limiter, and the isolation port 13 of the bridge 10 is an output port of the absorption type amplitude limiter;
the coupling output port 15 of the bridge 10 is connected to the input end of the first amplitude limiting module 20, the through output port 14 of the bridge 10 is connected to the input end of the second amplitude limiting module 30, the output end of the first amplitude limiting module 20 is connected to the input end of the first load module 40, the output end of the second amplitude limiting module 30 is connected to the input end of the second load module 50, and both the first load module 40 and the second load module 50 are grounded.
In this embodiment, the operation principle of the absorption limiter is as follows:
when a small signal is input to the input port 12 of the bridge 10, the first amplitude limiting module 20 and the second amplitude limiting module 30 are not conductive, the first amplitude limiting module 20 and the second amplitude limiting module 30 are equivalently in an open-circuit state, and the signal is reflected to the isolation port 13 of the bridge 10 from the input port 12 of the bridge 10 through the through output port 14 and the coupling output port 15, and is represented as a small insertion loss state.
When a large signal is input to the input port 12 of the bridge 10, the first amplitude limiting module 20 and the second amplitude limiting module 30 are turned on, the first amplitude limiting module 20 and the second amplitude limiting module 30 are equivalently in a short-circuit state, power is absorbed by the first load module 40 and the second load module 50, the through output port 14 and the coupling output port 15 of the bridge 10 are in a matching state, and the input port 12 and the output port are isolated, namely in an amplitude limiting state.
In the embodiment, a conventional three-port structure that an input/output line is connected with an amplitude limiter in parallel to the ground is not adopted, a 3dB coupler input port 12 and an isolation port 13 are adopted as the input and the output of the absorption type amplitude limiter, and a direct port and a coupling port are cascaded with an amplitude limiting module; the amplitude limiting module is connected with the absorption load in series, so that the structure of the absorption type amplitude limiter is simplified, and good port standing wave is ensured when a high-power signal is injected; and a monolithic integration process is adopted, so that the application is convenient.
As can be seen from the foregoing embodiments, the present embodiment provides an absorption type amplitude limiter, which includes a bridge 10, a first amplitude limiting module 20, a second amplitude limiting module 30, a first load module 40, and a second load module 50; an input port 12 of the bridge 10 is used as the input of the absorption type amplitude limiter, and an isolation port 13 is used as the output of the absorption type amplitude limiter, so that the insertion loss and the leakage power are reduced; the limiter of the embodiment adopts a monolithic integration mode, the electric bridge 10, the load, the circuit and the diode are integrated on one limiter chip, the structure of the absorption type limiter is simplified, the size of the absorption type limiter is reduced, the form is simple, monolithic integration is easy to realize, input and output power resistance is equivalent, the power resistance level is high, and the reliability is good.
In one embodiment, the first clipping module 20 includes a first diode D1 and a second diode D2, a cathode of the first diode D1 and an anode of the second diode D2 are respectively connected to the input terminal of the first clipping module 20, and an anode of the first diode D1 and a cathode of the second diode D2 are respectively connected to the output terminal of the first clipping module 20.
In one embodiment, the first diode D1 and the second diode D2 are GAN PIN diodes.
In the present embodiment, the first diode D1 and the second diode D2 may further include, but are not limited to, SiC diodes, PN diodes, and schottky diodes.
In one embodiment, the second clipping module 30 includes a third diode D3 and a fourth diode D4, a cathode of the third diode D3 and an anode of the fourth diode D4 are respectively connected to the input terminal of the second clipping module 30, and an anode of the third diode D3 and a cathode of the fourth diode D4 are respectively connected to the output terminal of the second clipping module 30.
In one embodiment, the third diode D3 and the fourth diode D4 are GAN PIN diodes.
In the present embodiment, the third diode D3 and the fourth diode D4 may further include, but are not limited to, SiC diodes, PN diodes, and schottky diodes.
In one embodiment, the first load module 40 includes a first resistor R1.
In one embodiment, the second load module 50 includes a second resistor R2.
In one embodiment, further comprising a first inductance L1 and a second inductance L2;
a first terminal of the first inductor L1 is connected to the output terminal of the first clipping module 20, and a second terminal of the first inductor L1 is grounded;
a first terminal of the second inductor L2 is connected to the output terminal of the second clipping module 30, and a second terminal of the second inductor L2 is grounded.
In one embodiment, the first inductor L1 and the second inductor L2 are both choke inductors.
In one embodiment, the bridge 10 comprises a 3db bridge 10.
As shown in fig. 3, fig. 3 shows a simulation curve of the absorption type limiter in a small signal insertion loss state, where fig. 3(a) shows a simulation curve of an output reflection coefficient and an input reflection coefficient of the absorption type limiter in the small signal insertion loss state, and fig. 3(b) shows a simulation curve of an insertion loss of the absorption type limiter in the small signal insertion loss state. As shown in fig. 4, fig. 4 shows simulation curves of the absorption limiter in the large-signal limiting state, fig. 4(a) shows simulation curves of the output reflection coefficient and the input reflection coefficient of the absorption limiter in the large-signal limiting state, and fig. 4(b) shows simulation curves of the insertion loss of the absorption limiter in the large-signal limiting state.
According to the simulation curve, the single-bridge 10 structure is adopted in the embodiment to realize the absorption type amplitude limiter with the S-band tolerance peak power exceeding 200W and the insertion loss smaller than 1dB, the blank that the absorption type amplitude limiter is realized by adopting the single-bridge 10 is filled, the insertion loss of the amplitude limiter is smaller than 1dB, the tolerance power is larger than 100W (200us pulse width and 10% duty ratio) in the working frequency band of 2 GHz-5 GHz, and the amplitude limiting isolation is larger than 20 dB. Compared with the traditional absorption type amplitude limiter, the structure is greatly simplified; by adopting the amplitude limiter, a new idea of the receiver absorption type amplitude limiter can be provided, the integration level is high, the assembly is simple, and the reliability is high.
The absorption type amplitude limiter provided by the embodiment can improve the protection capability of a receiver on electromagnetic interference and the reliability of a product, and meanwhile, the absorption type structure can improve port standing waves under the condition of high power, simplify the structure of a system, and has the characteristics of high integration level, small size, simplicity in assembly and high reliability.
The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. An absorptive limiter, comprising: the device comprises a bridge, a first amplitude limiting module, a second amplitude limiting module, a first load module and a second load module; the bridge comprises an input port, a through output port, an isolation port and a coupling output port;
the input port of the bridge is the input port of the absorption type amplitude limiter, and the isolation port of the bridge is the output port of the absorption type amplitude limiter;
the coupling output port of the bridge is connected with the input end of the first amplitude limiting module, the through output port of the bridge is connected with the input end of the second amplitude limiting module, the output end of the first amplitude limiting module is connected with the input end of the first load module, the output end of the second amplitude limiting module is connected with the input end of the second load module, and the first load module and the second load module are both grounded.
2. The absorption limiter as claimed in claim 1, wherein the first limiting module comprises a first diode and a second diode, a cathode of the first diode and an anode of the second diode are respectively connected to the input terminal of the first limiting module, and an anode of the first diode and a cathode of the second diode are respectively connected to the output terminal of the first limiting module.
3. The absorptive limiter of claim 2, wherein the first diode and the second diode are GAN PIN diodes.
4. The absorption limiter as claimed in claim 1, wherein the second limiting module comprises a third diode and a fourth diode, a cathode of the third diode and an anode of the fourth diode are respectively connected to the input terminal of the second limiting module, and an anode of the third diode and a cathode of the fourth diode are respectively connected to the output terminal of the second limiting module.
5. The absorptive limiter of claim 4, wherein the third diode and the fourth diode are GAN PIN diodes.
6. The absorptive limiter of claim 1, wherein the first load module comprises a first resistor.
7. The absorptive limiter of claim 1, wherein the second load module comprises a second resistor.
8. The absorptive limiter of claim 1, further comprising a first inductance and a second inductance;
the first end of the first inductor is connected with the output end of the first amplitude limiting module, and the second end of the first inductor is grounded;
the first end of the second inductor is connected with the output end of the second amplitude limiting module, and the second end of the second inductor is grounded.
9. The absorptive limiter of claim 8, wherein the first inductor and the second inductor are both choke inductors.
10. The absorptive limiter of any one of claims 1 to 9, wherein the bridge comprises a 3db bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020499024.7U CN212343741U (en) | 2020-04-08 | 2020-04-08 | Absorption type amplitude limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020499024.7U CN212343741U (en) | 2020-04-08 | 2020-04-08 | Absorption type amplitude limiter |
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| Publication Number | Publication Date |
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| CN212343741U true CN212343741U (en) | 2021-01-12 |
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| CN202020499024.7U Active CN212343741U (en) | 2020-04-08 | 2020-04-08 | Absorption type amplitude limiter |
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| CN (1) | CN212343741U (en) |
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