Miniaturized hmsiw single-cavity triple-mode bandpass filter with wide stopband

Abstract

The invention discloses a HMSIW single-cavity three-mode band-pass filter with miniaturization and wide stop band, which includes an upper metal plate, a microwave dielectric plate and a lower metal plate; the upper metal plate includes a pair of input / output feeders, two rows perpendicular to each other metallized via, two loaded slot lines, an open stub between the two loaded slot lines, and the first metallized via directly above the open stub. Among them, the introduction of two loaded slot lines can not only increase a resonance mode and transmission zero point, but also increase the TE of the cavity 201 Die-drawn to TE 101 near the mode, and the higher order mode TE 202 The frequency of the mode remains basically unchanged, which is conducive to the miniaturization of the structure and the realization of a wide stop band. The first metallized vias are used to perturb the te 101 mode, so that a suitable bandwidth can be obtained. In the input / output feeder, the purpose of introducing the third and fourth slot lines is to obtain the best in-band matching. Compared with the prior art, the invention is small in size and has the characteristic of wide stop band, and can be well applied in future millimeter wave communication systems.

Description

Technical field[0001]The invention relates to a half-mode substrate integrated waveguide (HMSIW) band-pass filter, in particular to a miniaturized wide-stop band band-pass filter, which belongs to the field of microwave technology and can be used in a millimeter wave transceiver system.Background technique[0002]Bandpass filters play an important role in modern wireless communication systems. They are mainly used in radio frequency / microwave systems to select useful signals while suppressing spurious signals. Moreover, it is also an important component for distinguishing different spectrums, which is of great significance for improving the utilization of spectrum resources.[0003]The miniaturization, low insertion loss, and wide stop band of the band-pass filter promote its application. With the increasingly high-density integration of future devices, the miniaturization of devices is the only way for the development of future devices and microwave systems. Of course, band-pass filter...

AI Technical Summary

Problems solved by technology

First, in most cases, the center frequency of the multi-mode resonant SIW bandpass filter is in the high-order resonant mode, which directly leads to an increase in size; second, the multi-mode resonant modes all use substrate integrated waveguides mode, its out-of-band rejection is poor

Therefore, the characteristics of miniaturization, wide stopband and multi-mode resonance of SIW bandpass filter will be the design difficulties and challenges of millimeter wave communication in the future

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