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Coupling line internal loading type low-pass and band-stop microwave transmission line filter with reconfigurable transmission response

A technology of coupling transmission lines and microwave transmission lines, applied in waveguide devices, electrical components, circuits, etc., can solve the problems of single in-band response and uncompact structure of microstrip filters, and achieve the effect of simple structure

Active Publication Date: 2020-01-17
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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  • Coupling line internal loading type low-pass and band-stop microwave transmission line filter with reconfigurable transmission response
  • Coupling line internal loading type low-pass and band-stop microwave transmission line filter with reconfigurable transmission response
  • Coupling line internal loading type low-pass and band-stop microwave transmission line filter with reconfigurable transmission response

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Experimental program
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Embodiment 1

[0021] In this embodiment, the bandwidth of the filter is 0-400 MHz, the S11 is -15 dB, and a filter composed of ideal transmission line elements is taken as an example.

[0022] Such as figure 1 As shown, a coupled line internally loaded low-pass and band-stop microwave transmission line filter with reconfigurable transmission response, including: an input port (1), an output port (2), a coupled transmission line section one (3) and Coupled transmission line section two (4), one uniform transmission line (5), two open stub line one (6) and open stub line two (7) for internal loading,

[0023] The coupled transmission line section one (3) includes port one (9) and port two (10), and the coupled transmission line section two (4) includes port three (8) and port four (11);

[0024] A uniform transmission line (5) is connected in parallel on the port three (8) of the coupled transmission line section two (4) and the port two (10) of the coupled transmission line section one (3),...

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 coupled line internally loaded low-pass and band-stop microwave transmission line filter with reconfigurable transmission response, including: an input port (1), an output port (2), a coupled transmission line section one (3) and Coupled transmission line section two (4), one uniform transmission line (5), two open stub line one (6) and open stub line two (7) for internal loading,

[0037] The coupled transmission line section one (3) includes port one (9) and port two (10), and the coupled transmission line section two (4) includes port three (8) and port four (11);

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

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Abstract

The invention discloses a coupling line internal loading type low-pass and band-stop microwave transmission line filter with reconfigurable transmission response. The filter comprises an input port, an output port, a section of coupling transmission line section, a section of uniform transmission line and two sections of internally loaded open-circuit branch lines; according to different filter parameter indexes, a circuit structure meeting requirements can be rapidly synthesized; the structure is simple, and the position of the in-band corrugation is adjustable; the position of the out-of-band transmission zero point is adjustable, that is, the out-of-band rejection has selectivity.

Description

technical field [0001] The invention relates to a coupled line internally loaded low-pass and band-stop microwave transmission line filter with reconfigurable transmission response. 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 the prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203H01P1/20
CPCH01P1/20H01P1/2039
Inventor 周玉婷黄晓东金秀华
Owner NANJING UNIV OF POSTS & TELECOMM
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