Triplexer design with hairpin structure

Abstract

Signal combiners are an important part of high frequency electronics. Generally in higher frequencies, antennas have large bandwidths and lots of systems need a single antenna. In order to combine different frequencies, traditional power combiners such as Wilkinson, Hybrid Coupler etc. are not efficient. In this paper, a 3 bands combiner (triplexer) which consists of hairpin type band pass filters is presented. Bands of triplexer are 3.4–3.7 GHz, 3.9–4.25 GHz and 4.45–4.9 GHz. Triplexer is designed as microstrip lines on a Taconic substrate by using AWR design tool.