Double-frequency three-order band-pass filter based on microstrip ridge gap waveguide

Abstract

The invention belongs to the technical field of microwave devices, and discloses a double-frequency three-order band-pass filter based on microstrip ridge gap waveguides. A metal floor is arranged onthe upper surface of an upper dielectric plate, metalized via holes are embedded in the two sides and the middle of the dielectric plate respectively, and a grounded coplanar waveguide-microstrip gapwaveguide transition structure is loaded on the lower surface of the dielectric plate. A metal ridge is loaded on the upper surface of the lower dielectric plate, mushroom-shaped EBG structures are loaded at the two sides of the metal ridge, and a metal floor is arranged on the lower surface of the lower dielectric plate. Three microstrip ridge gap waveguide dual-mode resonators are embedded in the metal ridge, and two sections of metal ridges are loaded between the microstrip ridge gap waveguide dual-mode resonators on the upper surface of the lower dielectric plate and are of a coupling structure. According to the invention, the double-frequency three-order band-pass filter is realized, the double-frequency filter is compact in structure, and the frequencies of the two passbands are easyto control independently. The double-frequency band-pass filter based on the microstrip ridge gap waveguide is realized for the first time, so that the application of the microstrip ridge gap waveguide is wider.

Description

technical field [0001] The invention belongs to the technical field of microwave devices, in particular to a dual-frequency third-order band-pass filter based on a microstrip ridge-gap waveguide. Background technique [0002] At present, the closest existing technology: filter is a crucial device in the communication system. At present, the realization of filter mainly includes microstrip filter, SIW filter and gap waveguide filter, etc.; gap waveguide technology as a The new electromagnetic transmission and shielding structure has the characteristics of non-electric contact, which effectively reduces the problem of poor performance caused by poor electrical contact of the circuit. Due to the advantages of non-electrical contact, gap waveguide technology provides convenience in circuit packaging, circuit design, and antenna design. Gap waveguide technology includes ridge gap waveguide, groove gap waveguide and microstrip gap waveguide, etc., and the microstrip ridge gap wav...

AI Technical Summary

Problems solved by technology

However, since microstrip gap waveguide technology has just been proposed as a new type of transmission line in recent years, there are few filter designs based on microstrip gap waveguide technology. At present, only single-frequency microstrip gap waveguide filters have been reported. With the trend of multi-protocol and multi-band development, the use of these single-frequency microstrip gap waveguide filters will lead to a larger overall volume of the communication system

[0003] In summary, the existing problems in the prior art are: the existing microstrip gap waveguide filters are all single-frequency filters, which do not meet the needs of multi-band work in communication systems

At present, no dual-band filter based on microstrip ridge-gap waveguide has been reported based on microstrip ridge-gap waveguide filter design.

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