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Open circuit stub loaded coupled line feed-based balance dual-passband filter

A dual-pass band filter, open-circuit branch technology, applied in the direction of waveguide-type devices, circuits, electrical components, etc., can solve the problem of unsuitable balanced band-pass filter, etc., and achieve the effect of compact size, low cost and simple structure

Active Publication Date: 2018-08-03
YANGZHOUSRKLE INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Therefore, the traditional common-mode rejection method can only effectively guarantee the rejection characteristics of common-mode signals when the order of the filter is high, and cannot be applied to the design of a balanced bandpass filter with a lower order (such as the second order)

Method used

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  • Open circuit stub loaded coupled line feed-based balance dual-passband filter
  • Open circuit stub loaded coupled line feed-based balance dual-passband filter
  • Open circuit stub loaded coupled line feed-based balance dual-passband filter

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0022] Such as figure 1 with 2 As shown, a balanced double-passband filter based on an open-circuit stub loaded coupled line feed includes a bottom metal floor 24, an intermediate dielectric substrate 23 (thickness is 0.8mm, relative permittivity is 2.55), an upper metal circuit and Four ports define one side of the balanced dual passband filter as C side, and the opposite side as C' side, defining symmetry planes AA' and BB'.

[0023] The four ports are respectively port P1, port P1', port P2, and port P2'. Both port P1 and port P1' are located on the C side and are a group of differential input and output ports. Both port P2 and port P2' are located on the C' side. It is another set of diff...

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Abstract

The invention discloses an open circuit stub loaded coupled line feed-based balance dual-passband filter. The balance dual-passband filter comprises a metal circuit; and the metal circuit comprises acoupled feed network and a resonator. By adopting an open circuit stub loaded type couple feed structure, common-mode signal suppression within a full-frequency range can be realized; and meanwhile, the adopted resonator has two controllable difference module resonant modes, so that dual-frequency difference module band-pass operation can be realized.

Description

technical field [0001] The invention relates to a balanced double-passband filter based on an open-circuit stub loaded coupling line feed, and belongs to the technical field of balanced filters in wireless communication. Background technique [0002] Wireless communication technology plays an increasingly important role in modern people's life. As a key component in a wireless communication system, a filter can effectively filter out useless or interfering signals, and its performance greatly affects the communication performance of the communication system. Balanced dual-passband filters have attracted much attention from academia and industry due to their great application prospects in modern wireless communication systems. The dual-passband balanced filter that has been reported so far, its differential-mode dual-passband characteristics are generally realized by multiple resonance modes of traditional multimode resonators, and common-mode signal suppression is generally...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
Inventor 吴小虎葛俊祥
Owner YANGZHOUSRKLE INDAL
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