A novel design of triplexer for GSM based on SIR

✍ Scribed by N. Molaei Garmjani; Nader Komjani

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 641 KB
• Volume: 52
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.25535

✦ Synopsis

Abstract

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