الفهرس | Only 14 pages are availabe for public view |
Abstract In this thesis , a microstrip duplexer for the third generation (3G) Universal Mobile Telecommunication System (UMTS) base station is investigated. Simple microstrip coupled-lines resonators have been used to develop the required structure. This satisfies different constraints such as a high electrical performance level (especially, a very narrow bandwidth, low insertion loss and a high out-of-band rejection), great compactness, low cost and a compatibility with a standard planar integration. Simulation and optimization processes are carried out with the aid of the Advanced Design System (ADS) electromagnetic simulator that uses the full–wave Method of Moment (MoM) numerical technique. Accurate results are obtained. The losses caused by both the substrate and metallization are taken into account during the simulation process. The duplexer is designed, simulated, analyzed, implemented and measured. During this thesis , a complete design and fabrication procedure of a one-chip Surface Acoustic Wave (SAW) duplexer is studied this shows a brilliant challenge for future work . |