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Low-pass and band-stop microwave transmission line filter with self-coupling structure and reconfigurable transmission response

A technology for coupling transmission lines and microwave transmission lines, which is applied to waveguide-type devices, electrical components, circuits, etc., can solve the problems of single in-band response, and the structure of microstrip filter is not compact, and achieves the effect of good selectivity and simple structure.

Inactive Publication Date: 2020-01-10
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: the purpose of the invention is to provide a structure filter with simple structure and easy fabrication for the problem that the structure of the existing microstrip filter is not compact and the response in the band is single, so that the position of the ripple in the band is adjustable, and Optional out-of-band rejection feature

Method used

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  • Low-pass and band-stop microwave transmission line filter with self-coupling structure and reconfigurable transmission response
  • Low-pass and band-stop microwave transmission line filter with self-coupling structure and reconfigurable transmission response
  • Low-pass and band-stop microwave transmission line filter with self-coupling structure and reconfigurable transmission response

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Embodiment 1

[0021] In this embodiment, the bandwidth of the filter is 0-200 MHz, the S11 is -20 dB, and a filter composed of ideal transmission line elements is taken as an example.

[0022] Such as figure 1 As shown, a low-pass and band-stop microwave transmission line filter with a self-coupling structure whose transmission response can be reconfigured includes: an input port (1), an output port (2), a coupling transmission line section one (3) and a coupling Transmission line section two (4), a section of uniform transmission line (5),

[0023] The coupled transmission line section one (3) includes port one (7) and port two (8), and the coupled transmission line section two (4) includes port three (6) and port four (9);

[0024] A uniform transmission line (5) is connected in parallel on the port three (6) of the coupled transmission line section two (4) and the port two (8) of the coupled transmission line section one (3); form a low-pass sum with a self-coupling structure Bandstop ...

Embodiment 2

[0035] In this embodiment, the bandwidth of one set of filters is 0-200MHz, and S11 is -20dB; the bandwidth of another set of filters is 0-400MHz, and S11 is -20dB, and a novel filter formed by ideal transmission line elements is example.

[0036] Such as figure 1 As shown, a low-pass and band-stop microwave transmission line filter with a self-coupling structure whose transmission response can be reconfigured includes: an input port (1), an output port (2), a coupling transmission line section one (3) and a coupling Transmission line section two (4), a section of uniform transmission line (5),

[0037] The coupled transmission line section one (3) includes port one (7) and port two (8), and the coupled transmission line section two (4) includes port three (6) and port four (9);

[0038] A uniform transmission line (5) is connected in parallel on the port three (6) of the coupled transmission line section two (4) and the port two (8) of the coupled transmission line section ...

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Abstract

The invention discloses a low-pass and band-stop microwave transmission line filter with a self-coupling structure and reconfigurable transmission response. The filter comprises an input port, an output port, a coupling transmission line section and a section of uniform transmission line. A circuit structure meeting requirements can be rapidly synthesized according to different filter parameter indexes. The structure is simple, and the position of in-band ripple is adjustable. The position of the transmission zero outside the pass band is variable, so that the out-of-band rejection characteristic of the filter is more selective. According to the invention, the response of the filter can have the characteristics of amplitude equiripple and the like, the position of ripple in the pass band is adjustable, and multiple optimization of the performance is supported.

Description

technical field [0001] The invention relates to a low-pass and band-stop microwave transmission line filter with a self-coupling structure whose transmission response can be reconfigured. Background technique [0002] In a communication system, a filter is a very important electronic device. It can effectively filter out some specific frequency points in the communication system or frequency points other than this frequency, so as to ensure that the communication system can transmit signals more efficiently and accurately. [0003] With the rapid development of the communication field, the system has higher and higher requirements for the filter index, which makes the filter smaller and more compact, and has low insertion loss. And it has more selectivity in the band and higher inhibition in the band. Contents of the invention [0004] Purpose of the invention: the purpose of the invention is to provide a structure filter with simple structure and easy fabrication for th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
CPCH01P1/2039
Inventor 黄晓东周玉婷金秀华
Owner NANJING UNIV OF POSTS & TELECOMM
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