CN216648570U - Directional waveguide coupler - Google Patents
Directional waveguide coupler Download PDFInfo
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- CN216648570U CN216648570U CN202122999060.7U CN202122999060U CN216648570U CN 216648570 U CN216648570 U CN 216648570U CN 202122999060 U CN202122999060 U CN 202122999060U CN 216648570 U CN216648570 U CN 216648570U
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- microstrip line
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Abstract
The utility model discloses a directional waveguide coupler, comprising: the microstrip line coupler comprises a main waveguide, a substrate and a microstrip line arranged on the substrate, wherein the substrate is arranged on the main waveguide, a coupling hole is formed in the main waveguide, one end of the microstrip line is connected with a load, and the main waveguide is coupled with the microstrip line through the coupling hole; when microwaves are input from one end of the main waveguide, part of the input microwaves are output from the other end of the microstrip line, and part of the input microwaves are output from the other end of the main waveguide. The substrate and the microstrip line on the substrate are used as the auxiliary waveguide, so that the performance index can be optimized only by debugging the substrate and the microstrip line during debugging, and the debugging is convenient.
Description
Technical Field
The utility model relates to the technical field of waveguide couplers, in particular to a directional waveguide coupler.
Background
A directional coupler is an element that places two transmission lines close enough together so that power on one line can be coupled to the other. The signal amplitudes of the two output ports can be equal or unequal. The directional coupler is one of important components in a microwave system, and has the main functions of sampling and extracting the radio-frequency power of the transmission waveguide, coupling a power signal into a measuring range which can be measured by a measuring system, accurately measuring and analyzing the signal, and measuring and monitoring the radio-frequency power transmitted by the transmission waveguide. The directional coupler has directivity for the use of radio frequency power, and may use power in the same direction as the main waveguide, or may sample reflected power in the opposite direction of the main waveguide. The waveguide directional coupler is a directional power distribution device, and the essence of the waveguide directional coupler is to distribute power of microwave signals according to a certain directional coupler ratio. The incident wave or the reflected wave in the main transmission system can be sampled separately by means of a directional coupler.
The high-precision radio frequency sampling monitoring signal is provided for a radio frequency control system, the 'directivity' index of the waveguide directional coupler is one of key technical parameters influencing the overall monitoring and control precision of the high-frequency system, and the index of the waveguide directional coupler is required to be adjusted to be optimal.
The traditional rectangular waveguide directional coupler is a completely adopted machined structural body, consists of a main waveguide cavity and an auxiliary waveguide cavity, couples electromagnetic energy in the main waveguide into the auxiliary waveguide through a coupling hole, and has certain directivity. However, once manufactured according to the design, the sample cannot be debugged and optimized, and the sample often needs to be repeatedly manufactured for many times, so that the sample is very inflexible in design and debugging, or the performance cannot reach the optimal target; moreover, the fine adjustment of the specification of each frequency band requires a special redesign of the whole, so that the platform planning production cannot be realized, and the requirements of multiple frequency bands cannot be flexibly realized.
SUMMERY OF THE UTILITY MODEL
In view of the above technical problems, an object of the present invention is to provide a directional waveguide coupler, which solves the problem that the conventional waveguide directional coupler has to be designed and debugged by repeatedly manufacturing a sample again due to the use of a machined structural body, so that the design and debugging of the conventional waveguide directional coupler are very inflexible.
The utility model adopts the following technical scheme:
a directional waveguide coupler, comprising: the microstrip line coupler comprises a main waveguide, a substrate and a microstrip line arranged on the substrate, wherein the substrate is arranged on the main waveguide, a coupling hole is formed in the main waveguide, one end of the microstrip line is connected with a load, and the main waveguide is coupled with the microstrip line through the coupling hole; when microwaves are input from one end of the main waveguide, part of the input microwaves are output from the other end of the microstrip line, and part of the input microwaves are output from the other end of the main waveguide.
Optionally, the substrate is a PCB.
Optionally, the number of the coupling holes is at least one.
Optionally, joints are disposed at two ends of the microstrip line.
Optionally, the joint is an SMA joint or an N joint.
Optionally, the resistance of the load is 50 ohms.
Optionally, one end of the main waveguide is an input end, and the other end of the main waveguide is a through output end; one end of the microstrip line is an isolation output end, the other end of the microstrip line is a coupling output end, and the through output end and the coupling output end output in a coaxial line.
Optionally, the PCB is fixedly mounted on the main waveguide by screws.
Optionally, the main waveguide is provided with two PCB boards, and each PCB board is provided with a microstrip line.
Optionally, an absolute value of the coupling degree of the directional waveguide coupler is greater than 60dB, and both the front directivity and the rear directivity of the directional waveguide coupler are greater than 20 dB.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the substrate and the microstrip line on the substrate are used as the auxiliary waveguide, so that the performance index can be optimized only by debugging the substrate and the microstrip line during debugging, and the debugging is convenient; compared with a structural part, the microstrip line has better precision control, and the waveguide coupler can have better production consistency; in addition, the utility model can obtain directional waveguide coupler products with different coupling degrees or different frequency bands by only adopting different substrates and microstrip lines without changing the main waveguide, thereby forming diversified products.
Drawings
Fig. 1 is a schematic diagram of a directional waveguide coupler according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a directional waveguide coupler according to an embodiment of the present invention;
FIG. 3 is a graph illustrating measured performance testing of a directional waveguide coupler according to an embodiment of the present invention;
wherein, 1, main waveguide; 2. a substrate; 3. a microstrip line; 4. a coupling hole; 5. and (7) a PCB board.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, and it should be noted that, in the premise of no conflict, the following described embodiments or technical features may be arbitrarily combined to form a new embodiment:
the first embodiment is as follows:
referring to fig. 1-3, fig. 1 shows a directional waveguide coupler according to the present invention, including: the microstrip line coupler comprises a main waveguide 1, a substrate 2 and a microstrip line 3 arranged on the substrate 2, wherein the substrate 2 is arranged on the upper surface of the main waveguide 1, a coupling hole 4 is formed in the main waveguide 1, one end of the microstrip line 3 is connected with a load, and the main waveguide 1 is coupled with the microstrip line 3 through the coupling hole 4; the microwave input from one end of the main waveguide 1 is partially output from the other end of the microstrip line 3, and the microwave is partially output from the other end of the main waveguide 1.
Optionally, one end of the microstrip line 3 is connected to a 50 ohm load as an isolation end.
The microstrip line 3 is a microwave transmission line formed of a single conductor strip supported on a dielectric substrate. WAVEGUIDE (WAVEGUIDE) is a structure used to directionally guide electromagnetic waves. In electromagnetic and communications engineering, a waveguide refers to any linear structure that transmits electromagnetic waves between its ends.
The working principle of the directional waveguide coupler is as follows:
when microwaves are input from one end of the main waveguide 1, high-power microwaves in the input microwaves are transmitted in the main waveguide 1, and a small part of microwave components are transmitted to the substrate 2 and the microstrip line 3 on the substrate through the coupling hole 4.
In the implementation process, the substrate 2 and the microstrip line 3 on the substrate 2 are used as the auxiliary waveguide, so that the performance index can be optimized only by debugging the substrate 2 and the microstrip line 3 during debugging, and the debugging is convenient; compared with a structural part, the microstrip line 3 is controlled with better precision, so that the waveguide coupler has better production consistency; in addition, the utility model can obtain directional waveguide coupler products with different coupling degrees or different frequency bands by only adopting different substrates 2 and microstrip lines 3 without changing the main waveguide 1, thereby forming diversified products.
As an embodiment, please refer to fig. 2, where fig. 2 shows a directional waveguide coupler of the present invention, including: the waveguide coupler comprises a main waveguide 1, a PCB 5 and a microstrip line 3 arranged on the PCB 5, wherein the PCB 5 is arranged on the upper surface of the main waveguide 1, a coupling hole 4 is formed in the main waveguide 1, one end of the microstrip line 3 is connected with a load, and the main waveguide 1 is coupled with the microstrip line 3 through the coupling hole 4; the microwave input from one end of the main waveguide 1 is partially output from the other end of the microstrip line 3, and the microwave is partially output from the other end of the main waveguide 1. The number of the coupling holes 4 is at least one.
Wherein, both ends of the microstrip line 3 are provided with joints.
Optionally, the joint is an SMA joint or an N joint.
Optionally, the load has a resistance of 50 ohms.
Specifically, when in use, one end of the main waveguide 1 is an input end, and the other end of the main waveguide 1 is a through output end; one end of the microstrip line 3 and one end of the main waveguide 1 are located on the same side, one end of the microstrip line 3 is an isolation output end, and the other end of the microstrip line 3 is a coupling output end. And the through output end and the coupling output end are coaxially output.
In the implementation process, the coupling output end and the main waveguide 1 output the coaxial line, so that the use is convenient, and the output is realized without adding a part for converting the waveguide to the coaxial line.
Specifically, the PCB board 5 is fixedly mounted on the main waveguide 1 by screws.
Specifically, two PCB boards 5 are installed on the main waveguide 1, and each PCB board 5 is provided with a microstrip line 3.
The absolute value of the coupling degree of the directional waveguide coupler is larger than 60dB, and the front directivity and the rear directivity of the directional waveguide coupler are both larger than 20 dB.
The parameters measured in the practice of the utility model are shown in table 1 below:
table 1: parameter table
The 'directivity' index of the waveguide directional coupler is one of key technical parameters influencing the overall monitoring and control precision of a high-frequency system, and as can be seen from the table 1, the current measurement result is obviously superior to that of the conventional product.
Referring to FIG. 3, FIG. 3 is a graph illustrating performance testing measured in accordance with an embodiment of the present invention.
In the implementation process, forward power and backward power are coupled out from the microwave power transmitted by the main waveguide 1, and the method can be used for detecting the magnitude of the microwave power transmitted in the waveguide.
The PCB 5 and the microstrip line 3 thereon are used as the auxiliary waveguide, so that the debugging can be convenient, and the performance index can be optimized only by debugging the microstrip line 3, the capacitor or the auxiliary resistor; compared with a structural member, the microstrip line 3 on the PCB 5 can better realize precision control, and the waveguide coupler can have better production consistency; moreover, products are diversified conveniently, namely, the main waveguide 1 is not changed, and coupler products with different coupling degrees or different frequency bands can be obtained only by adopting different PCB boards 5 and microstrip lines 3; in addition, the waveguide coupler of the utility model has better directivity, can realize higher coupling degree, such as 70dB, and can be applied to a microwave system with higher power.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (10)
1. A directional waveguide coupler, comprising: the microstrip line coupler comprises a main waveguide, a substrate and a microstrip line arranged on the substrate, wherein the substrate is arranged on the main waveguide, a coupling hole is formed in the main waveguide, one end of the microstrip line is connected with a load, and the main waveguide is coupled with the microstrip line through the coupling hole; when microwaves are input from one end of the main waveguide, part of the input microwaves are output from the other end of the microstrip line, and part of the input microwaves are output from the other end of the main waveguide.
2. The directional waveguide coupler of claim 1, wherein the substrate is a PCB board.
3. A directional waveguide coupler according to claim 1, wherein the number of said coupling holes is at least one.
4. The directional waveguide coupler according to claim 1, wherein the microstrip line is provided with a joint at both ends.
5. A directional waveguide coupler according to claim 4, wherein the joint is an SMA joint or an N joint.
6. A directional waveguide coupler according to claim 1, wherein the load has a resistance of 50 ohms.
7. A directional waveguide coupler according to claim 1, wherein one end of the main waveguide is an input end and the other end of the main waveguide is a through output end; one end of the microstrip line is an isolation output end, the other end of the microstrip line is a coupling output end, and the through output end and the coupling output end output in a coaxial line.
8. A directional waveguide coupler according to claim 2, wherein the PCB board is fixedly mounted on the main waveguide by means of screws.
9. The directional waveguide coupler according to claim 7, wherein the main waveguide is mounted with two PCB boards, each PCB board being provided with a microstrip line.
10. The directional waveguide coupler of claim 1, wherein the absolute value of the degree of coupling of the directional waveguide coupler is greater than 60dB, and the forward directivity and the backward directivity of the directional waveguide coupler are greater than 20 dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122999060.7U CN216648570U (en) | 2021-11-30 | 2021-11-30 | Directional waveguide coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122999060.7U CN216648570U (en) | 2021-11-30 | 2021-11-30 | Directional waveguide coupler |
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| Publication Number | Publication Date |
|---|---|
| CN216648570U true CN216648570U (en) | 2022-05-31 |
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| CN202122999060.7U Active CN216648570U (en) | 2021-11-30 | 2021-11-30 | Directional waveguide coupler |
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| CN (1) | CN216648570U (en) |
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2021
- 2021-11-30 CN CN202122999060.7U patent/CN216648570U/en active Active
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