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Novel double-band microstrip filter

A microstrip filter and dual-band technology, applied in the field of filters, can solve the problems of large size and high loss, and achieve the effect of small size, low insertion loss and easy passband characteristics

Inactive Publication Date: 2015-06-03
HARBIN FEIYU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to improve the shortcomings of the existing dual-band microstrip filter design, such as large size and high loss.

Method used

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Embodiment Construction

[0019] In recent years, SIR resonators have begun to be applied to the design of dual-band microstrip filters. This type of filter makes full use of the parasitic passband of SIR resonators, has better passband performance, and has a compact structure and is easy to process. The application range is wide, and the present invention makes full use of the resonant characteristics of the SIR resonant structure to design a low-cost, high-performance dual-band microstrip filter.

[0020] The specific structure of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] like figure 1 As shown, the present invention is composed of a dielectric substrate (20), a metal microstrip patch (30) and a metal grounding plate (10). The metal microstrip patch (30) includes a 50-ohm microstrip feeder (31) and a rectangular ring SIR structure (32).

[0022] The novel dual-band microstrip filter is characterized in that the rectangular ring SIR...

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Abstract

The invention relates to a novel double-band microstrip filter, which comprises metal microstrip patches (30) and a metal grounding plate (10), the metal microstrip patches (30) and the metal grounding plate (10) are formed on the top surface and bottom surface of a dielectric plate (20), and each metal microstrip patch (30) comprises a 50Ohm microstrip feeder (31) and a rectangular annular SIR (Surface Insulation Resistance) structure (32). By reasonable coupling of the two rectangular annular SIR structures, the double-band (2.4GHz and 5.2GHz) design of WLAN (wireless local area networks) is realized. The novel double-band microstrip filter is structurally compact and small, passband characteristics can be easily separately regulated, good passband performance can be generated, and the novel double-band microstrip filter is applicable to WLAN wireless communication systems.

Description

technical field [0001] The invention relates to a filter, in particular to a novel double-band microstrip filter. Background technique [0002] Due to its frequency-selective characteristics, microwave filters play an extremely important role in circuits such as microwave communication, electronic countermeasures, radar, and guidance. In these communication systems, it is an indispensable device, and its performance can directly affect the quality of the entire communication system. With the continuous development of modern communication systems, the requirements for microstrip filters are getting higher and higher, so microwave filters have been developed rapidly. [0003] The rapid development of modern communication systems has made spectrum resources more and more tense, which will enable people to develop and use electromagnetic waves in higher frequency bands. And with the diversification of communication modes, it will be difficult for single-band communication to m...

Claims

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Application Information

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IPC IPC(8): H01P1/203
Inventor 张道亮刘雷王娇
Owner HARBIN FEIYU TECH