阅读说明：本技术 一种适用于腔体滤波器的同轴转微带连接器和装配方法 (Coaxial microstrip-to-coaxial connector applicable to cavity filter and assembling method ) 是由 李东亮 宋旸 仇冬梅 宋子敬 贾治国 于 2020-03-31 设计创作，主要内容包括：本申请公开了一种适用于腔体滤波器的同轴转微带连接器和装配方法,涉及连接器技术领域,同轴转微带连接器包括能够与腔体滤波器和微波电路同时连接的基体,所述基体一侧开有微带腔,所述微带腔内部远离开口一端开有贯穿至所述基体另一侧的空气过渡腔；该同轴转微带连接器的使用将使腔体滤波器在微波集成电路中同轴转微带处的阻抗匹配特性得到保证,大大减少了调试人员的调试工作量,同时保证了产品的一致性,提高了工作效率。(The application discloses a coaxial microstrip-to-microstrip connector applicable to a cavity filter and an assembly method, and relates to the technical field of connectors, wherein the coaxial microstrip-to-microstrip connector comprises a base body which can be simultaneously connected with the cavity filter and a microwave circuit, a microstrip cavity is formed in one side of the base body, and an air transition cavity penetrating to the other side of the base body is formed in one end, far away from an opening, in the microstrip cavity; the coaxial microstrip-to-microstrip connector ensures the impedance matching characteristic of the cavity filter at the coaxial microstrip-to-microstrip position in the microwave integrated circuit, greatly reduces the debugging workload of debugging personnel, ensures the consistency of products and improves the working efficiency.)

1. The coaxial microstrip-to-microstrip connector is characterized by comprising a base body which can be simultaneously connected with a cavity filter and a microwave circuit, wherein a microstrip cavity is formed in one side of the base body, and an air transition cavity penetrating through the other side of the base body is formed in one end, far away from an opening, in the microstrip cavity.

2. The coaxial microstrip connector according to claim 1 wherein said air transition cavity inner diameter is smaller than said microstrip cavity inner diameter.

3. The coaxial microstrip connector of claim 1 wherein said substrate comprises a first mounting body and a second mounting body; the second installation body is fixedly connected to the top of the first installation body.

4. The coaxial to microstrip connector of claim 3 wherein said first mounting body has a transverse mounting flange hole and said second mounting body has a longitudinal mounting flange hole.

5. The coaxial microstrip connector according to claim 4, wherein the microstrip cavity penetrates from the top of the second mounting body to the inside of the first mounting body, and the air transition cavity penetrates to the outside of the first mounting body on the side far away from the second mounting body.

6. The coaxial microstrip connector according to claim 5 wherein the second mounting body has a step notch formed on one side thereof and communicating with the microstrip cavity; the ladder notch is connected with a cover plate.

7. The coaxial microstrip connector according to claim 3 wherein the first mounting body and the second mounting body are integrally formed.

8. The assembly method of the coaxial microstrip-to-coaxial connector suitable for the cavity filter is characterized by comprising the following steps of:

Laying the microstrip line in the microstrip cavity;

Connecting the transverse mounting flange hole with the input end and the output end of the cavity filter through flanges;

Connecting the microstrip line laid in the microstrip cavity with the insulating terminal of the cavity filter;

Connecting the cavity filter provided with the coaxial microstrip-to-microstrip connector with a microwave system circuit through a longitudinal mounting flange hole;

Electrically interconnecting the microstrip line in the microstrip cavity with the microstrip line in the microwave system circuit;

And installing the cover plate at the step gap.

Technical Field

The application relates to the technical field of microwaves, in particular to a coaxial microstrip-to-microstrip connector for a cavity filter and an assembling method.

Background

The cavity filter is a passive device used for frequency distribution and frequency selection in a microwave system in an electronic equipment system, and is widely applied to systems such as a frequency source and a switch filter bank due to the advantages of large bandwidth, high isolation and the like. The cavity filter is a two-port device, has important functions of signal isolation, interference suppression and the like, and is widely applied to systems of modern microwave and millimeter wave communication, satellite communication, remote sensing, radar technology and the like. The performance of the system directly affects the operation quality of the whole system.

In the traditional use method of the cavity filter, the two ports of the cavity filter are designed to be input and output of the SMA connector, so that a circuit interface interconnected with the cavity filter must be designed to be input and output of the SMA connector, thereby not only greatly increasing the hardware cost of the product, but also increasing the use size of the cavity filter and greatly reducing the integration level of the product using the cavity filter.

In order to improve the integration of the frequency selection and frequency distribution system, the SMA connector between the cavity filter and the circuit interface is usually removed, the cavity filter is directly embedded on the microstrip transmission line in the microwave circuit, and the inner conductor of the insulating terminal of the cavity filter is electrically connected with the microstrip transmission line of the microwave circuit by welding. Therefore, the integration level of the product is greatly improved, but the process of embedding the cavity filter between microwave transmission lines and directly welding the inner conductor of the insulated terminal of the cavity filter on the microstrip transmission line can cause the ground discontinuity of the cavity filter and the microwave circuit, further cause the impedance matching characteristic imbalance between the circuit transmission line and the cavity filter, directly influence the transmission effect of microwave signals at the cavity filter, and cause the standing wave deterioration, the isolation reduction and even the complete loss of the frequency selection characteristic and the isolation characteristic of the cavity filter.

Therefore, the novel connector suitable for the cavity filter and capable of electrically interconnecting the cavity filter and the microstrip transmission line is developed, the transmission characteristic of the microwave signal between the microstrip transmission line and the cavity filter is further improved under the condition that the system integration level is not changed, the lossless transmission of the microwave signal from coaxial to microstrip is realized, and the original signal isolation and anti-interference performance of the cavity filter are guaranteed to be particularly important.

Disclosure of Invention

The invention aims to provide a coaxial microstrip-to-microstrip connector suitable for a cavity filter and an assembling method aiming at the defects of the prior art. The connector realizes the lossless connection between the cavity filter and the microwave circuit microstrip transmission line, solves the problem of lossless transmission between the microwave signal coaxial line and the microstrip line between the existing cavity filter and the circuit transmission line, reduces the workload of debugging personnel on the premise of ensuring the product integration level, and improves the product consistency.

The embodiment of the application adopts the following technical scheme: the embodiment of the application provides a coaxial microstrip connector that changes suitable for cavity filter, include the base member that can be connected with cavity filter and microwave circuit simultaneously, base member one side cooperation is opened there is the microstrip chamber, the microstrip intracavity portion is kept away from opening one end and is opened there is the air transition chamber that runs through to the base member opposite side.

Further, the inner diameter of the air transition cavity is smaller than the inner diameter of the micro-strip cavity.

Further, the base body comprises a first mounting body and a second mounting body; the first installation body can be connected with the cavity filter, and the second installation body can be connected with the microwave circuit.

Furthermore, the second installation body is fixedly connected to the top of the first installation body.

Furthermore, a transverse installation flange hole is formed in the first installation body, and a longitudinal installation flange hole is formed in the second installation body.

Further, the microstrip cavity penetrates through the second mounting body from the top to the inside of the first mounting body; the air transition cavity penetrates through the first installation body and is arranged outside one side, far away from the second installation body, of the first installation body.

Furthermore, one side of the second mounting body is provided with a step gap communicated with the microstrip cavity; the ladder notch is connected with a cover plate.

Furthermore, the first installation body and the second installation body are of an integrated structure.

The embodiment of the application also adopts the following technical scheme: a method for assembling a coaxial microstrip-to-coaxial connector suitable for a cavity filter comprises the following steps:

Laying the microstrip line in the microstrip cavity;

Connecting the transverse mounting flange hole with the input end and the output end of the cavity filter through flanges;

Connecting the microstrip line laid in the microstrip cavity with the insulating terminal of the cavity filter;

Connecting the cavity filter provided with the coaxial microstrip-to-microstrip connector with a microwave system circuit through a longitudinal mounting flange hole;

Electrically interconnecting the microstrip line in the microstrip cavity with the microstrip line in the microwave system circuit;

And installing the cover plate at the step gap.

The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects: the cavity filter can fully exert the characteristics of components such as high inhibition, high isolation, interference resistance and the like of the cavity filter in an integrated microwave circuit, and replaces the rough process of directly welding the traditional cavity filter in the integrated microwave circuit to realize electrical interconnection.

The connector realizes the assembly and the electrical interconnection of the cavity filter and the microwave circuit through the transverse and longitudinal installation flanges, not only ensures the high reliability of the structural installation, but also ensures the large-area grounding of the cavity filter and the microwave circuit through the transverse and longitudinal step structural design, greatly improves the impedance characteristic when microwave signals are transmitted from a coaxial to a micro-strip between the cavity filter and the microwave circuit, and improves the isolation and inhibition capability of the cavity filter.

The connector is additionally provided with the air transition cavity between the original cavity filter and the microwave circuit, so that standing waves at the joint of the cavity filter and the microwave circuit can be improved, and meanwhile, the insertion loss caused by the use of the cavity filter in the microwave circuit is greatly reduced, and the overall performance of the integrated microwave circuit is improved.

The multi-channel multi-band microwave integrated circuit using the connector does not need to carry out physical isolation among channels among the cavity filters, simplifies the assembly method of the cavity filters, reduces the design and installation processes of the microwave integrated circuit using the cavity filters, and further improves the integration level of the microwave integrated circuit using the cavity filters.

The connector ensures the impedance matching characteristic of the cavity filter at the position of coaxial to microstrip conversion in the microwave integrated circuit, greatly reduces the debugging workload of debugging personnel, ensures the consistency of products and improves the working efficiency.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic diagram of an embodiment of a coaxial to microstrip connector structure suitable for a cavity filter according to the present invention;

3 FIG. 3 2 3 is 3 a 3 schematic 3 cross 3- 3 sectional 3 view 3 of 3 the 3 structure 3 of 3 FIG. 3 1 3 A 3- 3 A 3; 3

FIG. 3 is a schematic diagram of a cover plate structure according to an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a use state according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.