Premium
GSM open‐loop duplexer filter with internal stubs
Author(s) -
Bezerra A. L.,
de Souza M. F. A.,
e Silva F. R. L.,
de Oliveira B. G. M.,
de Melo M. T.
Publication year - 2008
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.23677
Subject(s) - duplexer , gsm , resonator , loop (graph theory) , attenuation , filter (signal processing) , engineering , microwave , electronic engineering , electrical engineering , insertion loss , band pass filter , wideband , topology (electrical circuits) , acoustics , physics , telecommunications , optics , mathematics , combinatorics , antenna (radio)
Abstract A duplexer filter with open‐loop resonators, having internal stubs, for the GSM band in the DSC1800 Cellular Radio Base Station standard is presented. The filters use square open‐loop resonators. Insertion of the stubs allows the perimeter of the loop to be less than λ/2, which is the length used in the canonical loop. The device was fabricated on PTFE (RO3010) board. An eight‐pole selective filter with a single pair of attenuation poles was used. A full‐wave EM simulator was used to obtain the dimensions of the resonators. The measurement results are presented in comparison with the expected simulated values. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2422–2426, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23677