Balance-non-balance filtering power divider based on ring resonators

Abstract

The invention discloses a new balance-non-balance filtering power divider based on ring resonators. The filtering power divider includes an upper layer microstrip structure, an intermediate layer dielectric slab and lower layer grounding metal, wherein the upper layer microstrip structure includes two square ring resonators, two microstrip lines which connect the two square ring resonators, one isolation resistor, one metalized through hole, and four input / output port microstrip feed lines, wherein each ring resonator is formed by two microstrip lines and two parallel coupling lines; and the two ring resonators are connected through the two microstrip lines, and the left side microstrip line introduces transmission zero, thus improving the out-of-band rejection degree, and the isolation resistor is loaded at the midpoint of the right side microstrip line and the lower layer grounding metal is connected, thus realizing isolation of the two output ports. The new balance-non-balance filtering power divider based on ring resonators has the advantages of being multifunctional, being high in common mode rejection degree, being simple in structural design, being preferable in electric performance, and being easy to realize circuit integration and system packaging.

Description

technical field [0001] The invention relates to a filter power splitter, in particular to a ring resonator-based balanced-unbalanced filter power splitter with multiple functions, strong anti-interference ability and high harmonic suppression degree. Background technique [0002] With the rapid development and application of wireless communication technology, the information transmission efficiency and quality of various new wireless communication systems are getting higher and higher, and the structure is becoming more and more complex. Crosstalk between adjacent transmission lines, interference caused by coupling, and external equipment The radiation brought by it greatly affects the overall performance of the circuit, and the balanced circuit solves this problem well due to its better common-mode rejection ability and anti-interference characteristics. The filter is an important passive device in the microwave communication system. It has frequency selection characteristi...

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Problems solved by technology

At present, there are few studies on balanced filter power splitters. The disadvantages are: (1) The cascading of the two devices will introduce a large insertion loss, which is not conducive to the integration and miniaturization of the system; (2) Anti-environmental The noise interference ability is weak; (3) the out-of-band suppression is poor

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