Integrated substrate wave-guide bandpass filter based on triangular complementary split-ring resonator

Abstract

The invention relates to an integrated substrate wave-guide bandpass filter based on a triangular complementary split-ring resonator. The integrated substrate wave-guide bandpass filter comprises a resonant cavity in equilateral triangle, the resonant cavity is composed of an upper surface metal layer, a medium substrate and a lower surface metal grounding plate stacked in order; the upper metal layer is communicated with the lower surface metal grounding plate through the bottom metal column after penetrating the medium substrate; and a triangular complementary split-ring resonator is arranged at a center location of the upper surface metal layer, wherein the triangular complementary split-ring resonator is loaded in a pair of triangular resonant cavities in a degenerate mode, the complementary split-ring resonant can product a passband, the produced passband is modulated to a pair of degenerate modes by regulating the parameter of the ring resonator, thereby improving the bandwidth of the filter. The transmission zero point of the bandpass filter can be further adjusted by opening a round interference metal hole in the resonant cavity, thereby effectively inhibiting the out-of-band harmonic. The bandpass filter disclosed by the invention is not only simple in structure, convenient for processing, but also can effectively inhibit the out-of-band harmonic since the transmissionzero-points are coexistent in the low-frequency end and the high-frequency end, the high frequency selectivity and excellent performance are provided.

Description

technical field [0001] The invention relates to a band-pass filter, in particular to a band-pass filter based on an integrated substrate waveguide of a triangular complementary split resonant ring, and belongs to the technical field of wireless communication. Background technique [0002] With the rapid development of modern wireless communication technology, communication equipment is constantly developing in the direction of miniaturization, low cost and high performance. In early microwave systems, traditional metal waveguides were widely used because of their high quality factor, high power capacity, and low loss. But at the same time, metal waveguides are difficult to integrate in modern microwave systems due to their shortcomings of large volume and high processing cost. [0003] In order to overcome the above shortcomings, in recent years, Substrate Integrated Waveguide (SIW: Substrate Integrated Waveguide) has been widely used in microwave and millimeter wave system...

AI Technical Summary

Problems solved by technology

In the past few decades, there have been a large number of literatures on rectangular and circular substrate integrated waveguides, but the research on triangular substrate integrated waveguides is still insufficient, and the research on triangular multimode resonator filters is even more insufficient.

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