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

Abstract

The invention discloses a substrate-integrated waveguide—a coplanar waveguide band-pass filter, which is composed of a substrate-integrated waveguide and a coplanar waveguide periodic structure. An input terminal and an output terminal are provided on the substrate-integrated waveguide. The waveguide includes a dielectric substrate. Metal patches are respectively provided on the upper and lower surfaces of the dielectric substrate. At least 2 rows of metallized through holes are arranged on the dielectric substrate. The metal patches on the upper and lower surfaces are formed by metallization. Through-hole connection, the coplanar waveguide periodic structure includes at least one coplanar compact coplanar waveguide unit whose bottom surface is a metal patch, and the coplanar compact coplanar waveguide unit is located in the substrate integrated waveguide. The present invention has the dimensions Small size, which is conducive to the design of microwave and millimeter-wave integrated circuits. The entire structure can be realized by traditional PCB or LTCC technology, which meets the design needs of microwave and millimeter-wave three-dimensional integrated circuits; it has very good frequency selection characteristics, simple design methods, and wide application range. bandwidth and lower loss.

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 millimeter wave devices....

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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