Microwave millimeter wave dual-band filter

Abstract

The invention discloses a microwave millimeter wave dual-band filter. The microwave millimeter wave dual-band filter comprises a dielectric substrate, an upper metal surface located at the upper surface of the dielectric substrate, and a lower metal surface located at the lower surface. The upper metal surface is rectangular, and an upper micro-strip line is connected with one of two long sides while a lower micro-strip is connected with the other long side; a first annular groove and a second annular groove which are the same with each other are respectively etched in the upper metal surface, a first rectangular groove is embedded in the first annular groove while a second rectangular groove is embedded in the second annular groove, and the first rectangular groove is the same with the second rectangular groove. A row of upper metal grounding through holes arrayed at intervals are formed in each of two ends of each long side of the upper metal surface along the short sides; the size of the lower metal surface is the same with that of the dielectric substrate, the lower metal surface is connected with the ground, lower metal grounding through holes are formed in the lower metal surface in the projection positions of the upper metal grounding through holes, and each upper metal grounding through hole is connected with the corresponding lower metal grounding through hole through a metal post. The microwave millimeter wave dual-band filter is small in volume, low in consumption, simple in structure and easy to regulate the upper and lower side frequencies.

Description

technical field [0001] The invention relates to the field of aerospace and multi-band ground antenna station satellite communication, in particular to a microwave and millimeter wave dual-passband filter based on SIW-EBG structure in wireless communication Background technique [0002] In recent years, with the rapid development of multi-band ground antenna station satellite communication systems, dual-passband filters have been widely used in radio frequency communication. In many radio frequency communication systems, it is necessary to filter out some of the signals in a specific frequency range to suppress spurs, or the system needs to transmit frequency signals of multiple discontinuous channels through a beam, so the research of double-pass band filters is very important. The traditional SIW (Substrate Integrated Waveguide integrated substrate waveguide) dual passband filter structure generally adopts multiple modes and multi-layer structures of integrated substrate w...

AI Technical Summary

Problems solved by technology

The disadvantages of this type of structure are: (1) High processing accuracy requirements; (2) The overall volume of the filter is large; (3) The application frequency band of the filter is low

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