A cutoff-waveguide bandpass filter using antiresonant elements for sharp passband skirt and wide stopband characteristics

Ohira, Masataka; Matsumoto, Takaaki; Ma, Zhewang

doi:10.1109/apmc.2013.6694826

Cited by 2 publications

(1 citation statement)

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“…In the past years, a few millimeter‐wave planar filters have been reported . The waveguide filter has a low insertion loss and a high selectivity . However, it suffers from the bulky size, low integration with planar active devices, and high fabrication costs.…”

Section: Introductionmentioning

confidence: 99%

Developing high performance Q‐band planar filters using the multilayered substrate integrated waveguide technique

Hao

Kong

2017

Micro & Optical Tech Letters

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In this article, a novel planar multilayer Q‐band band‐pass filter is presented by cascading a low‐pass filter (LPF)and a high‐pass filter (HPF). The HPF is designed by utilizing the high‐pass behavior of the substrate integrated waveguide, and the LPF is realized by using millimeter‐wave lump‐element resonators. Since the insertion loss resulted by the millimeter‐wave planar resonators, which resonate in‐band and have a limited quality factor, is avoided by using the cascaded high‐/low‐pass architecture, the proposed filter has a small insertion loss. Moreover, a flexible bandwidth can be achieved by properly adjusting the cutoff frequencies of the HPF and LPF. As a demonstration, a band‐pass filter having a center frequency of 42.5 GHz and a fractional bandwidth of 11.76% is designed, fabricated, and measured. Good agreement is obtained between simulated and measured results. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:698–703, 2017

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Section: Introductionmentioning

confidence: 99%