Wave-guide integrated on substrate-electronic band gap bandpass filter

Abstract

The disclosed filter includes a medium base plate. Metal pasters covered on both sides of the said base plate are as a top surface and floor. Substrate integration wave-guide (SIW) on base plate is setup at the medium base plate, and electronic band gap is setup at floor. Input end and output end are connected to integrated wave-guide on same base plate respectively. Structure of electronic band gap is composed of compact type units of electronic band gap arranged in array in same plane. Advantages are: small size of integrated structure of electronic band gap with SIW in filter, easy to be integrated with other ICs, wide frequency selectivity, simple designing method, and possible to add number of identical unit of structure of electronic band gap to increase frequency selectivity.

Description

Technical field [0001] The invention relates to a substrate integrated waveguide-electronic band gap that can be applied to the design of microwave and millimeter wave circuits, and can also be used in the design of microwave and millimeter wave integrated circuits in highly integrated systems such as system packaging (SOP) and system on chip (SOC). Band pass filter. Background technique [0002] Microwave and millimeter wave bandpass filters have a large number of applications in rapidly developing communication systems. With the rapid development of broadband communication systems, there is an urgent need for filters with very wide passbands. The use of traditional metal ridge waveguide and other structures can form a broadband microwave and millimeter wave bandpass filter. However, these forms of filters are firstly difficult to achieve very wide relative bandwidth (≥50%). Secondly, these forms of bandpass filters are relatively bulky and difficult to integrate with other micr...

AI Technical Summary

Problems solved by technology

However, it is difficult for these forms of filters to achieve a very wide relative bandwidth (≥50%). Secondly, these forms of bandpass filters are relatively bulky and difficult to integrate with other microwave and millimeter wave devices. Thirdly, these forms of bandpass filters The filter processing cost is relatively expensive, and the requirements for processing accuracy are relatively high

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