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A novel design of triplexer for GSM based on SIR
Author(s) -
Garmjani N. Molaei,
Komjani Nader
Publication year - 2010
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.25535
Subject(s) - gsm , band pass filter , electronic engineering , resonator , microwave , filter (signal processing) , diplexer , engineering , insertion loss , dimension (graph theory) , electrical engineering , telecommunications , mathematics , pure mathematics
In this article, a triplexer is presented for three operation frequencies in GSM, based on stepped impedance resonators (SIR).SIR structures have some characteristics, such as low weight, little dimension, and the ability of providing filter behavior with different frequencies in same dimensions. To design the triplexer, bandpass filters of each output should be design first. Parallel connection of three filters together causes an extreme increase in insertion loss of each filter and also reflection of power to the input. A novel based‐on‐SIR matching circuit is proposed to solve these problems. By connecting optimized matching circuits to three bandpass filters [1], which are simulated for three frequency ranges in GSM, the desired triplexer is obtained. This based‐on‐SIR triplexer is simulated and fabricated. The measurement results of the fabricated prototype shows a good agreement with simulation results. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2563–2568, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25535