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Microstrip dual‐band bandstop filter to suppress DGS, DMB, GPS, UTMTS, WCDMA, WIBRO, and WLAN bands
Author(s) -
Faraji Tayeb,
Hazeri Ali Reza
Publication year - 2012
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.26684
Subject(s) - wibro , microstrip , multi band device , w cdma , passband , return loss , microwave , electrical engineering , band stop filter , electronic engineering , topology (electrical circuits) , materials science , filter (signal processing) , computer science , engineering , telecommunications , band pass filter , code division multiple access , low pass filter , antenna (radio) , wireless network , wireless broadband , wireless
In this article, a new microstrip dual‐band bandstop filter (DSBF) is proposed. By combining coupled three‐line microstrip structures, single transmission lines, and coupled open‐end stubs, a DSBF with high‐rejection levels and sharp frequency responses in the stopbands is found. The proposed DSBF is optimized to suppress DGS, DMB, GPS, UTMTS, WCDMA, WIBRO, and WLAN bands. The insertion loss in the two stopbands is >20 dB from 1.52 to 2.77 GHz and from 4.88 to 5.8 GHz. Four transmission zeros are realized at 1.7, 2.7, 5.1, and 5.8 GHz. Moreover, return loss of passband between the first and second stopbands is excellent. The proposed DSBF is simulated (by ADS simulator) and fabricated on a substrate with a thickness of 0.635 mm and a relative dielectric of 10.2. Here is an excellent agreement between simulation and measurement results. The overall size of the DSBF is 17.538 × 14.4 mm 2 . © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:854–856, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26684