Research on a microwave bandpass filter with L-shaped structure

Yifeng Hou; Jun Qian

doi:10.1117/12.2648356

14 October 2022 Research on a microwave bandpass filter with L-shaped structure

Yifeng Hou, Jun Qian

Proceedings Volume 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022); 123430J (2022) https://doi.org/10.1117/12.2648356
Event: 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 2022, Qingdao, China

Abstract

In this paper, a novel microwave bandpass filter with L-shaped structure is introduced, which belongs to a kind of artificial surface plasmon polaritons (SSPPs) type microwave bandpass filter. The filter adopts a symmetrical three-stage structure. The first section is a slot-line waveguide section, which realizes the input/output of microwave signals. The second section is a transition section, which adopts the impedance gradient structure to achieve a good connection with the third section. The third section is the SSPPs section composed of periodic symmetric trapezoidal groove structure and 90 degree bend structure. The passband width and stopband characteristics of the filter can be adjusted by adjusting the geometric size of the trapezoidal groove and its air gap, also the microwave subwavelength binding effect can be further improved, which makes the SSPPs filter more excellent in resisting spatial electromagnetic interference. The filter can be used in L~S band civil microwave communication system.

Citation Download Citation

Yifeng Hou and Jun Qian "Research on a microwave bandpass filter with L-shaped structure", Proc. SPIE 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 123430J (14 October 2022); https://doi.org/10.1117/12.2648356

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KEYWORDS

Bandpass filters

Dielectric filters

Metals

Electronic filtering

Waveguides

Telecommunications

Dispersion

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