الفهرس 
Chapter (1): IntroductionOnly 14 pages are availabe for public view
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Abstract
This thesis presents a study in the design of Ultra-Wide band (UWB) antenna with band notched characteristics in order to prevent interference with narrow band applications coexisting with UWB applications. Instead of using an electronic circuit filter, notch or band rejection capability was achieved using a slot, parasitic elements, and electromagnetic band gab (EBG) structures. It introduces a compact UWB antenna design that operates from 3.1GHz to above 10.6GHz with WiMAX (3.15-3.85GHz) frequency band notch, WLAN (5.15-5.35GHz) frequency band notch and Bluetooth application support at 2.45GHz. Besides, it has a compact size. Another smaller and compact design is presented for UWB applications with WLAN band rejection using inverted C-slot with a full parasitic study. Design equations are investigated that help in controlling the specifications and performance of the notch function. These designs were fabricated and measured. A good agreement between the simulated and measured values are obtained with a high matching through the operating band and good frequency notching at the required bands.
Modern communications technologies combine UWB with the MIMO technology in order to obtain a higher data rates and higher quality of service. This thesis introduced two new compact 4x4 UWB-MIMO antennas. The first UWB-MIMO has a high isolation and low mutual coupling with a size of 62x62x1.5 mm3, while it provides double notches at WiMAX and WLAN frequencies to prevent interference with the coexisting applications and supporting the Bluetooth applications. The second is a 4x4 UWB-MIMO system with a smaller size of 52x52x1.5 mm3, introduces good isolation and low mutual coupling. Also it provides a WiMAX and WLAN band notch functions. The two 4x4 UWB-MIMO antennas were fabricated and measured. A good agreement between the measured and simulated results is obtained.