A tri-band bandpass filter with wide stopband using asymmetric stub-loaded resonators

Siang Wen Lan; Min Hang Weng; Shoou Jinn Chang; Cheng Yuan Hung; Shih Kun Liu

doi:10.1109/LMWC.2014.2365739

A tri-band bandpass filter with wide stopband using asymmetric stub-loaded resonators

Siang Wen Lan
, Min Hang Weng
, Shoou Jinn Chang
, Cheng Yuan Hung
, Shih Kun Liu

Institute of Microelectronics

Research output: Contribution to journal › Article › peer-review

59 Citations (Scopus)

Abstract

This letter presents a tri-band bandpass filter (BPF) with a wide stopband using asymmetric stub-loaded resonators (ASLR). A tri-band filter sample was fabricated by using two ASLRs with coupled I/O ports. By properly tuning the electrical length ratios of the ASLRs (α and γ), three passbands can be designed at 1.4, 2.4, and 3.5 GHz. The harmonic responses are suppressed effectively by forming an uncoupled section at the end of the ASLRs, and the stopband region is formed from 3.7 to 7 GHz with a rejection level of 30 dB. The measured results of the fabricated tri-band BPF exhibit good agreement with simulated results.

Original language	English
Article number	6948284
Pages (from-to)	19-21
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	25
Issue number	1
DOIs	https://doi.org/10.1109/LMWC.2014.2365739
Publication status	Published - 2015 Jan 1

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/LMWC.2014.2365739

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title = "A tri-band bandpass filter with wide stopband using asymmetric stub-loaded resonators",

abstract = "This letter presents a tri-band bandpass filter (BPF) with a wide stopband using asymmetric stub-loaded resonators (ASLR). A tri-band filter sample was fabricated by using two ASLRs with coupled I/O ports. By properly tuning the electrical length ratios of the ASLRs (α and γ), three passbands can be designed at 1.4, 2.4, and 3.5 GHz. The harmonic responses are suppressed effectively by forming an uncoupled section at the end of the ASLRs, and the stopband region is formed from 3.7 to 7 GHz with a rejection level of 30 dB. The measured results of the fabricated tri-band BPF exhibit good agreement with simulated results.",

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AU - Lan, Siang Wen

AU - Weng, Min Hang

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AU - Hung, Cheng Yuan

AU - Liu, Shih Kun

PY - 2015/1/1

Y1 - 2015/1/1

N2 - This letter presents a tri-band bandpass filter (BPF) with a wide stopband using asymmetric stub-loaded resonators (ASLR). A tri-band filter sample was fabricated by using two ASLRs with coupled I/O ports. By properly tuning the electrical length ratios of the ASLRs (α and γ), three passbands can be designed at 1.4, 2.4, and 3.5 GHz. The harmonic responses are suppressed effectively by forming an uncoupled section at the end of the ASLRs, and the stopband region is formed from 3.7 to 7 GHz with a rejection level of 30 dB. The measured results of the fabricated tri-band BPF exhibit good agreement with simulated results.

AB - This letter presents a tri-band bandpass filter (BPF) with a wide stopband using asymmetric stub-loaded resonators (ASLR). A tri-band filter sample was fabricated by using two ASLRs with coupled I/O ports. By properly tuning the electrical length ratios of the ASLRs (α and γ), three passbands can be designed at 1.4, 2.4, and 3.5 GHz. The harmonic responses are suppressed effectively by forming an uncoupled section at the end of the ASLRs, and the stopband region is formed from 3.7 to 7 GHz with a rejection level of 30 dB. The measured results of the fabricated tri-band BPF exhibit good agreement with simulated results.

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A tri-band bandpass filter with wide stopband using asymmetric stub-loaded resonators

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