Design of a high-selectivity quad-band bandpass filter using open-ended stub-loaded resonator

Duong, Tuan‐Viet; Le, Trong-Hieu; Duong, Tran Binh

doi:10.1080/02726343.2020.1821334

Cited by 4 publications

(1 citation statement)

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“…Two narrowband multiband BPFs are presented in Refs. [7,8] using stub‐loaded resonator (SLR). To design a tri‐band BPF, a stub‐loaded stepped‐impedance resonator (SL‐SIR) can be used by combing SIR and SLR 9,10 .…”

Section: Introductionmentioning

confidence: 99%

A quad‐band defected microstrip structure loaded bandpass filter for standard GPS , WiFi , WLAN , and WiMAX applications

Shakeri

Dousti

Ghalamkari

2022

Int J RF Mic Comp-Aid Eng

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A quad-band bandpass filter is proposed using a defected microstrip structure (DMS) for GPS, WiFi, WLAN, and WiMAX applications. This filter uses a stub-loaded stepped-impedance resonator (SL-SIR). The proposed filter is fabricated on an RT/Duroid5880 substrate (ε r = 2.2, h = 0.787 mm, tanδ = 0.0009).Then, the LC equivalent circuit of the proposed filter is presented. A 28thorder transfer function is obtained and approximated by 8th-order transfer functions. The results of simulation, measurements and the LC equivalent circuit are in good agreement. The proposed filter operates at 1.6, 2.48, 3.76, and 5.44 GHz. The measured insertion losses are 0.32, 027, 0.51, and 0.41 dB in the four bands, while the return losses are better than 10 dB in all frequency bands. Finally, the proposed filter is compared with other bandpass filters.

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Section: Introductionmentioning

confidence: 99%