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|Title||Design of UMTS/ LTE Diplexer and DCS/ UMTS/ LTE Triplexer For Mobile Communication Systems|
The central theme of this work is the design of a compact microstrip triplexer and diplexer for mobile communication systems at base stations to work as a transceiver. The first stage includes designing individual microstrip bandpass hairpin filters. The first filter is specified to work at the Digital Cellular System (DCS) operating at 1710-1880 MHz band, whereas the second filter is specified to work at the Universal Mobile Telecommunication System (UMTS) operating at 1920-2170 MHz and the third filter is for the Long Term Evolution (LTE) system operating at 2500-2690 MHz band. The structure of each filter consists of five coupled resonators with chebyshev response. In the second stage, the individual filters are then combined together using a central transmission line that couples the energy from the common port to filters and the other way around. Two multiplexing components have been designed. The first is a diplexer for UMTS/ LTE systems, and the second component is a triplexer for DCS/ UMTS/ LTE systems. Optimization techniques available in CST simulation software such as Genetic and Nelder Mead Simplex algorithms have then been utilized to improve the performance of the whole structure of each component.
|Publisher||الجامعة الإسلامية - غزة|
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