A W-band waveguide bandpass filter

Abstract

The invention discloses a W-band waveguide bandpass filter, comprising: a waveguide and a dielectric substrate fixedly arranged in the waveguide; the dielectric substrate is partially arranged in the inner cavity of the waveguide; the dielectric substrate is arranged in the inner cavity of the waveguide; The part in the inner cavity of the waveguide is sequentially provided with an input transition rectangular metal strip, a periodic rectangular metal strip and an output transition rectangular metal strip along the preset millimeter wave signal propagation direction; the dielectric substrate is arranged on the The portion of the waveguide outside the cavity is provided with a radio frequency ground. The invention specifically provides a W-band dielectric substrate waveguide bandpass filter, which has high stopband suppression characteristics, good square coefficient, low insertion loss, wide operating bandwidth and flexible passband adjustment characteristics, which can meet the requirements of modern communication in specific scenarios. need.

Description

technical field [0001] The invention belongs to the technical field of millimeter wave filters, in particular to a W-band waveguide bandpass filter. Background technique [0002] In recent years, with the rapid development of microwave communication technology in the military and civilian fields, spectrum resources have become increasingly tight, especially in the field of civilian mobile communications, where spectrum resources are close to saturation. Technology to achieve high-quality communication has become a key research topic. In millimeter-wave communication, in order to increase the utilization rate of high-frequency spectrum resources and avoid mutual interference between microwave and millimeter-wave systems and between millimeter-wave systems as much as possible, millimeter-wave filters with frequency selection characteristics have become the goal to achieve this. core device. Millimeter wave communication has the advantages of good directivity, large communica...

AI Technical Summary

Problems solved by technology

The technical solutions disclosed above have flexible bandwidth adjustment capabilities and good insertion loss characteristics; however, they are all based on the microstrip resonator structure of the dielectric substrate to introduce transmission zeros to achieve the out-of-band suppression characteristics of the filter. Multiple resonators will lead to the complex structure of the filter itself and it is difficult to analyze; at the same time, the stop-band suppression based on the introduction of transmission zeros is limited and the filter square coefficient is not outstanding, which is difficult to meet the current specific high stop-band suppression application scenarios Requirements (exemplary, such as noise suppression in the field of electronic compatibility, etc.)

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