Wave-guide integrated on substrate-band-pass filter of coplanar wave-guide

Abstract

The filter is composed of periodic structured substrate integration wave-guide and coplanar wave-guide. Input end and output ends are setup at substrate integration wave-guide. Metal pasters are covered on upper and lower surfaces of medium substrate. There are at least two rows of metallized through holes on medium substrate. Thus, metal pasters on upper and lower surfaces are connected through the said metallized through holes. Periodic structure of coplanar wave-guide includes at least one compact type coplanar wave-guide unit, whose underside is a metal paster, in same plane. The said compact type coplanar wave-guide unit is positioned within the substrate integration wave-guide. Advantages are: small size, in favor of designing IC in millimeter microwave, realizable to traditional PCB or LTCC techniques, satisfying need of designing 3D IC in millimeter microwave, wide frequency selectivity, simple designing method, and good frequency selectivity.

Description

technical field [0001] The invention relates to a substrate integrated waveguide-coplanar waveguide band-pass filter which 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 SOP and SOC. 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. Broadband microwave and millimeter wave bandpass filters can be formed using traditional structures such as metal ridge waveguides. 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...

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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