A NEW TRI-BAND BANDPASS FILTER FOR GSM, WIMAX AND ULTRA-WIDEBAND RESPONSES BY USING ASYMMETRIC STEPPED IMPEDANCE RESONATORS | Zendy

Wei-Yu Chen | Zendy; MinHang Weng | Zendy; ShoouJinn Chang | Zendy; Hon Kuan | Zendy; YiHsin Su | Zendy

Open Access

A NEW TRI-BAND BANDPASS FILTER FOR GSM, WIMAX AND ULTRA-WIDEBAND RESPONSES BY USING ASYMMETRIC STEPPED IMPEDANCE RESONATORS

Author(s) -

Wei-Yu Chen,

MinHang Weng,

ShoouJinn Chang,

Hon Kuan,

YiHsin Su

Publication year - 2012

Publication title -

electromagnetic waves

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.437

H-Index - 89

eISSN - 1559-8985

pISSN - 1070-4698

DOI - 10.2528/pier11122010

Subject(s) - wimax , band pass filter , resonator , electrical impedance , gsm , wideband , electronic engineering , acoustics , materials science , electrical engineering , physics , computer science , telecommunications , optoelectronics , engineering , wireless

In this paper, a design of new tri-band bandpass fllter for the application of GSM (1.8GHz), WiMAX (2.7GHz) and UWB (3.3{ 4.8GHz) is proposed. The flrst two narrow passbands are created, and the bandwidth of the third passband can be tuned by properly selecting the impedance ratio (R) and physical length ratio (u) of the asymmetric stepped-impedance resonator. To improve passband performance and form the UWB passband, a U-shape defected ground structure and extra extended coupling lines are integrated with the asymmetric SIR. Due to the three transmission zeros appearing near the passband edges, the band selectivity of the proposed fllter is much improved. The fllter was fabricated, and the measured results have a good agreement with the full-wave simulated ones.

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