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Fabrication of an X-Band Dual Mode Bandpass Filter Using Low Cost FR4 Substrate
Min-Hung WENG Cheng-Yuan HUNG Hung-Wei WU
IEICE TRANSACTIONS on Electronics
Publication Date: 2005/01/01
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Microwaves, Millimeter-Waves
dual-mode, transmission zero, ring resonator, FR4,
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The investigation presents a low cost and low insertion loss X-band dual mode bandpass filter (BPF) based on inexpensive commercial FR4 substrate. The proposed filter at a central frequency f0 of 11.3 GHz has high filter performance filter with a fractional bandwidth of 14%, the insertion loss of -2.7 dB, and two transmission zeros. The designed procedures are presented in this letter and the fabricated filter verifies the proposed designed concept.