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A new compact quad‐band bandpass filter using quad‐mode stub loaded resonator
Author(s) -
Weng MinHang,
Ye ChangSin,
Su YanKuin,
Lan SiangWen
Publication year - 2014
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.28403
Subject(s) - stub (electronics) , passband , band pass filter , resonator , microwave , microstrip , electronic engineering , engineering , wireless , electrical engineering , acoustics , optoelectronics , physics , telecommunications
A new compact quad‐band microstrip bandpass filter designed using a quad‐mode stub‐loaded resonator (SLR) is proposed. The equivalent circuit of the SLR consists of one even mode and two odd resonant modes, used to create passbands operated at 1.8, 2.4, 3.5, and 5.2 GHz, corresponding to global system for mobile communications, wireless local area networks, and worldwide interoperability for microwave access applications. The filter is compact in size because only two sets of resonator are used by means of the quad‐mode behaviors. Furthermore, 0° feed structures is used to set at least one transmission zero on each side of each passband, resulting in high skirt selectivity. Experimental results show good agreement with the simulated results. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1630–1632, 2014