Triplexer design with hairpin structure

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.