A dual‐mode bandpass filter with a wide stopband using a controllable bandstop structure

Hung, Cheng‐Yuan; Weng, Min‐Hang; Yang, Ru‐Yuan

doi:10.1002/mop.23610

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…By cascading four units of transformed radial stub, a LPF with a wide stopband region and a high selectivity was constructed . Moreover, a LPF based on the rectangular stub resonator with different electrical length ratios was verified to effectively suppress the spurious responses of the dual mode bandpass filter .…”

Section: Introductionmentioning

confidence: 99%

A compact low‐pass filter with ultrabroad stopband characteristics

Lan

Weng

Chang

et al. 2015

Micro & Optical Tech Letters

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A compact low‐pass filter (LPF) with ultrabroad stopband characteristic is presented in this article. This filter mainly consists of a rectangular stub resonator and cumulative open‐circuited stubs, providing multiple transmission zeros to form a wide stopband region. Further, two open stub loads are simply adopted to improve the band selectivity. This fabricated LPF exhibits a 3 dB cutoff frequency (fc) at 1.74 GHz with an average low insertion loss of 0.25 dB and a broad stopband region from 2.6 to 22.8 GHz (10.8ƒc) under a high rejection level of 20 dB. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2800–2803, 2015

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Section: Introductionmentioning

confidence: 99%

A compact low‐pass filter with ultrabroad stopband characteristics

Lan

Weng

Chang

et al. 2015

Micro & Optical Tech Letters

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“…After Wolff firstly proposed a microstrip ring dual‐mode bandpass filter (BPF) in 1972 [1], the research of dual‐mode resonators has aroused the concerns of a growing number of researchers, and then many kinds of approaches were adopted to produce dual‐mode characteristics. Generally, two degenerate modes of a loop microstrip resonator can be separated by introducing various perturbations [2–5]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Novel hybrid four‐mode microstrip bandpass filter using two paralleled stub‐loaded resonators

Guan

Wang

et al. 2013

Micro & Optical Tech Letters

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A novel hybrid four‐mode microstrip bandpass filter (BPF) is proposed in this paper.The filter is realized by association of two stub‐loaded dual‐mode resonators. Two similar stub‐loaded dual‐mode resonators are set in parallel. By appropriately arranging the two dual‐mode resonators and the coupling between resonators with the microstrip feed lines, a new hybrid four‐mode BPF is achieved. The even‐ and odd‐mode theory is introduced to minutely analyze dual‐mode resonators. Moreover the circuit model and coupling matrix of the filter are built to further explain the proposed circuit. The proposed BPF is simulated, fabricated, and measured. Two transmission zeros have been achieved in the transition band of the filter, which improve the performance of the filter. The EM simulated and measured results are presented and excellent agreement is obtained validates the design concept. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:840–845, 2013; View this article online at wileyonlinelibrary.com. DOI: 10.1002/mop.27418

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