IEICE Trans - Fabrication of an X-Band Dual Mode Bandpass Filter Using Low Cost FR4 Substrate

Fabrication of an X-Band Dual Mode Bandpass Filter Using Low Cost FR4 Substrate

Min-Hung WENG
Cheng-Yuan HUNG
Hung-Wei WU

Publication
IEICE TRANSACTIONS on Electronics Vol.E88-C No.1 pp.143-145
Publication Date: 2005/01/01
Online ISSN:
DOI: 10.1093/ietele/e88-c.1.143
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Microwaves, Millimeter-Waves
Keyword:
dual-mode, transmission zero, ring resonator, FR4,

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Summary:
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.