Microstrip line coupler and antenna device

Abstract

A microstrip line coupler is arranged on a substrate and includes a main signal microstrip line for signal transmission, an input port arranged at one end of the main signal microstrip line, a through port arranged at the other end of the main signal microstrip line, a coupling part composed of a plurality of dispersed metal small units, a coupling port arranged at one end of the coupling part close to the input port and extending away from the main signal microstrip line, and a plurality of isolation ports arranged at one end of the coupling part close to the through port and extending away from the main signal microstrip line. The coupling port, part of the dispersed metal small units, and one of the plurality of isolation ports are electrically connected to form a coupling microstrip line. The coupling amount between the main signal microstrip line and the coupling microstrip line is adjusted by selecting different combinations of metal small units, and the coupling amount is adjustable without adding additional components.

Description

Technical Field

[0001] This invention relates to the field of coupler technology, and in particular to a microstrip line coupler and antenna device. Background Technology

[0002] Currently, the coupling amount of microstrip line couplers is usually adjusted by setting a Pi-type attenuator at the coupling end. However, this approach requires additional resistive elements, increasing costs. Furthermore, since the Pi-type attenuator can only reduce the coupling amount, it cannot be adjusted when the coupling amount is insufficient. Summary of the Invention

[0003] Therefore, it is necessary to provide a microstrip line coupler that can achieve adjustable coupling without adding additional components.

[0004] One embodiment of the present invention provides a microstrip line coupler, comprising:

[0005] Main signal microstrip line, used for signal transmission;

[0006] The input port is located at one end of the main signal microstrip line;

[0007] A through port is located at the other end of the main signal microstrip line;

[0008] The coupling section is composed of a plurality of dispersed small metal units;

[0009] A coupling port is disposed at one end of the coupling portion near the input port and extends in a direction away from the main signal microstrip line;

[0010] A plurality of isolation ports are disposed at one end of the coupling portion near the through port and extend in a direction away from the main signal microstrip line; wherein,

[0011] The coupling port, the partially distributed metal units, and one of the plurality of isolation ports are electrically connected to form a coupled microstrip line. The coupling amount between the main signal microstrip line and the coupled microstrip line can be adjusted by selecting different combinations of metal units.

[0012] Preferably, the coupling amount between the main signal microstrip line and the coupling microstrip line is adjusted by adjusting the length of the partially distributed metal cells with electrical connections.

[0013] Preferably, the longer the length of the partially distributed metal cells in the electrical connection, the greater the coupling between the main signal microstrip line and the coupling microstrip line.

[0014] Preferably, the coupling amount between the main signal microstrip line and the coupling microstrip line is adjusted by adjusting the distance between the electrically connected partially distributed metal cells and the main signal microstrip line.

[0015] Preferably, the greater the distance between the electrically connected partially distributed metal cells and the main signal microstrip line, the smaller the coupling between the main signal microstrip line and the coupling microstrip line.

[0016] Preferably, the coupling part is composed of M rows and N columns of small metal units, where M is an integer greater than 1 and N is an integer greater than 1.

[0017] Preferably, the metal unit is rectangular.

[0018] Preferably, the main signal microstrip line and the coupling section are parallel to each other.

[0019] In view of this, it is necessary to provide an antenna device including the microstrip line coupler described in any of the above claims.

[0020] Compared to existing technologies, the microstrip line coupler provided by the embodiments of the present invention includes a plurality of isolation ports, and the coupling part is composed of a plurality of distributed metal units. The coupling microstrip line is formed by electrically connecting the coupling ports, the partially distributed metal units, and one of the isolation ports. The coupling amount between the main signal microstrip line and the coupling microstrip line can be adjusted by selecting different combinations of metal units, thus achieving the adjustment of the coupling amount without the need for additional components. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of one embodiment of the microstrip line coupler of the present invention;

[0022] Figure 2 This is a schematic diagram showing the variation of coupling amount of a coupled microstrip line with different lengths in one embodiment of the microstrip line coupler of the present invention.

[0023] Figure 3 This is a schematic diagram showing the change in coupling amount between the coupled microstrip line and the main signal microstrip line at different distances in one embodiment of the microstrip line coupler of the present invention.

[0024] Explanation of main component symbols

[0025] Microstrip line coupler 1

[0026] Main signal microstrip line 10

[0027] Input port P1

[0028] Through port P2

[0029] Coupled port P3

[0030] Isolation ports P41-P4n

[0031] Coupling section 20

[0032] Metal small unit 201

[0033] Coupled microstrip line 202

[0034] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0036] In this document, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation may be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a separate or alternative implementation mutually exclusive with other implementations. It will be explicitly and implicitly understood by those skilled in the art that the implementations described herein can be combined with other implementations.

[0037] See Figure 1 As shown, Figure 1 This is a schematic diagram of a module of one embodiment of the microstrip line coupler 1 of the present invention. In this embodiment, the microstrip line coupler 1 can be applied to an antenna device. The microstrip line coupler 1 can be disposed on a substrate, such as a PCB board. The microstrip line coupler 1 includes a main signal microstrip line 10, an input port P1, a through port P2, a coupling section 20, a coupling port P3, and a plurality of isolation ports P41, P42...P4n.

[0038] In this embodiment, the main signal microstrip line 10 is used for signal transmission. An input port P1 is located at one end of the main signal microstrip line 10, and a through port P2 is located at the other end. A coupling section 20 is located below and parallel to the main signal microstrip line 10, and is composed of a plurality of distributed metal units 201. Specifically, the metal units 201 can be rectangular; however, in other embodiments, the metal units 201 can have other shapes, which are not limited here. The coupling section 10 is composed of M rows and N columns of metal units, where M is an integer greater than 1 and N is an integer greater than 1.

[0039] A coupling port P3 is located at one end of the coupling section near the input port and extends away from the main signal microstrip line. A plurality of isolation ports P41, P42…P4n are located at one end of the coupling section near the through port and extend away from the main signal microstrip line. The coupling port P3, the partially distributed metal unit 201, and one of the isolation ports P41, P42…P4n are electrically connected to form the coupling microstrip line 202. Figure 1 As shown, in this embodiment, the plurality of isolation ports P41, P42...P4n are illustrated using five isolation ports P41-P45 as an example, but this is not a limitation and can be determined according to actual needs. The coupling port P3, the partially distributed metal units 201, and the isolation port P43 are electrically connected to form the coupling microstrip line 202. The coupling port P3, the partially distributed metal units 201, and the isolation port P43 can be electrically connected using, but is not limited to, solder. The coupling amount between the main signal microstrip line 10 and the coupling microstrip line 202 is adjusted by selecting different combinations of metal units 201. Different combinations of metal units 201 represent different lengths of the coupling microstrip line 202 and different distances from the main signal microstrip line 10, thereby achieving adjustable coupling.

[0040] Specifically, the coupling amount between the main signal microstrip line 10 and the coupling microstrip line 202 can be adjusted by changing the length of the electrically connected partially distributed metal cells 201. The longer the length of the electrically connected partially distributed metal cells, the greater the coupling amount between the main signal microstrip line and the coupling microstrip line. (See attached diagram.) Figure 2 , Figure 2 This is a schematic diagram illustrating the variation of coupling at different lengths of the coupled microstrip line 202, as shown below. Figure 2As shown, when the distance between the coupling microstrip line 202 and the main signal microstrip line 10 remains unchanged, some metal units 201 are selected to be connected to the isolation port P42. That is, when the coupling microstrip line 202 is shortened, the coupling amount changes from the original -19.1dB to -20.1dB. The coupling amount decreases, and the coupling amount between the coupling microstrip line 202 and the main signal microstrip line can be adjusted by changing the length of the coupling microstrip line 202.

[0041] Specifically, the coupling between the main signal microstrip line 10 and the coupling microstrip line 202 can be adjusted by changing the distance between the electrically connected partially distributed metal cells 201 and the main signal microstrip line 10. The greater the distance between the electrically connected partially distributed metal cells 201 and the main signal microstrip line 10, the smaller the coupling between the main signal microstrip line 10 and the coupling microstrip line 202. (See attached diagram.) Figure 3 , Figure 3 This is a schematic diagram illustrating the variation in coupling amount between the coupled microstrip line 202 and the main signal microstrip line 10 at different distances, as shown below. Figure 3 As shown, while keeping the length of the coupled microstrip line 202 constant, by selecting different small metal units 201, the distance between the main signal microstrip line 10 and the coupled microstrip line 202 is increased, and the coupling amount changes from -19.1dB to -20.1dB, thus reducing the coupling amount. This achieves the goal of adjusting the coupling amount between the coupled microstrip line 202 and the main signal microstrip line 10 by changing the distance between them.

[0042] Compared to existing technologies, the microstrip line coupler provided by the embodiments of the present invention includes a plurality of isolation ports, and the coupling part is composed of a plurality of distributed metal units. The coupling microstrip line is formed by electrically connecting the coupling ports, the partially distributed metal units, and one of the isolation ports. The coupling amount between the main signal microstrip line and the coupling microstrip line can be adjusted by selecting different combinations of metal units, thus achieving the adjustment of the coupling amount without the need for additional components.

[0043] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any appropriate changes and modifications made to the above embodiments within the essential spirit and scope of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A microstrip line coupler disposed on a substrate, characterized in that, include: Main signal microstrip line, used for signal transmission; The input port is located at one end of the main signal microstrip line; A through port is located at the other end of the main signal microstrip line; The coupling section is composed of a plurality of dispersed small metal units; A coupling port is disposed at one end of the coupling portion near the input port and extends in a direction away from the main signal microstrip line; A plurality of isolation ports are disposed at one end of the coupling portion near the through port and extend in a direction away from the main signal microstrip line; wherein, The coupling port, the partially distributed metal units, and one of the plurality of isolation ports are electrically connected to form a coupled microstrip line. The coupling amount between the main signal microstrip line and the coupled microstrip line can be adjusted by selecting different combinations of metal units.

2. The microstrip line coupler as described in claim 1, characterized in that, The coupling amount between the main signal microstrip line and the coupling microstrip line is adjusted by adjusting the length of the partially distributed metal cells with electrical connections.

3. The microstrip line coupler as described in claim 2, characterized in that, The longer the length of the partially distributed metal cells in the electrical connection, the greater the coupling between the main signal microstrip line and the coupling microstrip line.

4. The microstrip line coupler as described in claim 2, characterized in that, The coupling amount between the main signal microstrip line and the coupling microstrip line is adjusted by adjusting the distance between the electrically connected partially distributed metal cells and the main signal microstrip line.

5. The microstrip line coupler as described in claim 4, characterized in that, The greater the distance between the electrically connected partially distributed metal cells and the main signal microstrip line, the smaller the coupling between the main signal microstrip line and the coupling microstrip line.

6. The microstrip line coupler as described in claim 1, characterized in that, The coupling part is composed of M rows and N columns of small metal units, where M is an integer greater than 1 and N is an integer greater than 1.

7. The microstrip line coupler as described in claim 1, characterized in that, The metal unit is rectangular.

8. The microstrip line coupler as described in claim 1, characterized in that, The main signal microstrip line is parallel to the coupling section.

9. An antenna device, characterized in that, Includes the microstrip line coupler as described in any one of claims 1-8.

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