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A Coupled Line Externally Loaded Low-Pass and Band-Stop Microwave Transmission Line Filter with Reconfigurable Transmission Response

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

Active Publication Date: 2021-10-19
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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  • A Coupled Line Externally Loaded Low-Pass and Band-Stop Microwave Transmission Line Filter with Reconfigurable Transmission Response
  • A Coupled Line Externally Loaded Low-Pass and Band-Stop Microwave Transmission Line Filter with Reconfigurable Transmission Response
  • A Coupled Line Externally Loaded Low-Pass and Band-Stop Microwave Transmission Line Filter with Reconfigurable Transmission Response

Examples

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Effect test

Embodiment 1

[0022] In this embodiment, the filter bandwidth is 0-400MHz, the S11 is -20dB, and a new type of filter composed of ideal transmission line elements is taken as an example.

[0023] like figure 1 As shown, a coupled line externally 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 external loading,

[0024] 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);

[0025] 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), the uniform transmission line (5) is connected in series...

Embodiment 2

[0037] 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.

[0038] like figure 1 As shown, a coupled line externally 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 external loading,

[0039] 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);

[0040] On the port three (8) of the coupled transmission line section two (4) and the port two (10) of the coupled transmission line sectio...

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Abstract

The invention discloses a coupled line externally loaded low-pass and band-stop microwave transmission line filter with reconfigurable transmission response. The present invention includes an input port, an output port, a section of coupled transmission line, a section of uniform transmission line, and two sections of externally loaded open-circuit stub lines; according to different filter parameter indexes, the present invention can quickly synthesize a circuit structure that meets the requirements; and The structure is simple, and the position of the ripple in the band is adjustable; the position of the transmission zero point outside the passband of the present invention is adjustable, that is, the out-of-band suppression is selective, and the attenuation of the transmission response at an integer multiple of 90 degrees in the electrical length is infinite . The invention can make the response of the filter have the characteristic of equal ripple in amplitude, and the position of the ripple in the passband can be adjusted, and supports multiple optimizations of performance.

Description

technical field [0001] The invention relates to a coupled line externally 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 Patents(China)
IPC IPC(8): H01P1/20H01P1/203
CPCH01P1/20H01P1/2039
Inventor 周玉婷黄晓东金秀华
Owner NANJING UNIV OF POSTS & TELECOMM
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