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A high-isolation microstrip duplexer loaded with open stubs

An open-circuit branch, high isolation technology, applied in the direction of circuits, waveguide devices, electrical components, etc., can solve the problem of insufficient isolation, and achieve the effect of compact circuit structure, easy control, and good consistency

Active Publication Date: 2020-12-15
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a high-isolation duplexer loaded with open-circuit stubs to overcome the shortcomings of the existing duplexer that the isolation is not high enough

Method used

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  • A high-isolation microstrip duplexer loaded with open stubs
  • A high-isolation microstrip duplexer loaded with open stubs

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments: a high-isolation microstrip duplexer loaded with open-circuit stubs, the lower surface of the dielectric substrate 4 is completely covered by a metal layer, and the metal layer on the upper surface includes a matching network 1 , capacitive coupling bandpass filter 2, inductive coupling bandpass filter 3, capacitive coupling bandpass filter 2 constitutes the high frequency channel of the duplexer, inductive coupling bandpass filter 3 constitutes the low frequency channel of the duplexer, capacitive coupling The bandpass filter 2 is composed of the first coupling capacitor 231, the first resonator 221, the second coupling capacitor 232, the second resonator 222, the third coupling capacitor 233, and the second port 21 connected in sequence, and the first resonator 221 The open branch is set upward and bent to the right, the open branch of the secon...

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Abstract

The invention provides a high isolation microstrip duplexer loaded with an open circuit branch, and solve the problem of low isolation of two channels of the duplexer. The duplexer comprises a matching network (1), a capacitively coupled band-pass filter (2) and an inductively coupled band-pass filter (3). The matching network (1) is composed of a first port (11), a hooked microstrip line (12) andan L-shaped microstrip line (13). The capacitively coupled band-pass filter is composed of a first coupling capacitor (231), a first resonator (221), a second coupling capacitor (232), a second resonator (222), a third coupling capacitor (233) and a second port (21) which are connected in turn. The inductively coupled band-pass filter is composed of a first short circuit branch (331), a first resonator (321), a second short circuit branch (332), a second resonator (322), a third short circuit branch (333) and a third port (31) which are connected in turn.

Description

technical field [0001] The invention belongs to the technical field of microwave radio frequency passive devices, in particular to a duplexer in microwave radio frequency passive devices. Background technique [0002] Today's microwave systems are developing toward high integration, high performance, and small size. Two or more channels are often integrated in a transceiver system. If an antenna is installed in the receiver and transmitter, it will not only increase the size of the entire system The volume of the receiver and the antenna of the transmitter will also affect each other, so the receiver and the transmitter usually share a set of antenna feed system. In order to reduce the mutual influence between the receiving channel and the transmitting channel, it is necessary to add a duplexer at the front end of the antenna and the transceiver. [0003] Duplexers can be divided into waveguide, coaxial, and microstrip duplexers according to their implementation methods. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/203
CPCH01P1/203
Inventor 程飞卢萍张冰杨阳陈星刘长军黄卡玛
Owner SICHUAN UNIV