الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Nowadays a great deal of interest has been shown in a development of wireless communication, which is providing new opportunity to develop novel structures that will enhance or even replace the existing circuits and antennas. Planar circuits technology, based on either microstrip or coplanar waveguides has been driving force for the modern microwave and millimeter-wave application systems, because of the enormous advantages of reducing hardware size and weight, easier integration with solid-state devices, and low power consumption. Realizing high performance microwave components in simple planar circuit technology, such as, filters, power dividers, and resonators, therefore, has been the dream of all RF design engineers since the early days of microwave monolithic integrated circuits (MMIC). Devices incorporating periodicity as a key feature of design have promising unrivaled performance in microwave systems. In the present work, the design of microwave coplanar-line filters is carried out using three different techniques: In the first part of this work, design of microwave low pass filters (LPF) using EBG structures with various periodic shapes in ground plane is carried out. The EBG structures in the ground plane is obtained using rectangular holes, split ring holes, triangular holes, complementary split ring resonator holes, circular holes, or 2-shape holes.. In addition, open slot split ring resonator (OSSRR) is used for the designing of the LPF developed in the present work. In part 2, fractal shape in ground plane is used in designing a microwave LPF and band stop filters. Four different filters are designed: LPF with fractal defected ground structure (DGS), LPF with continuous Minkowiski fractal element, multi-stop band filter with discontinuous Minkowiski element, and finally a wide multi-stop filter with separated interdigcap shape. A microstrip photonic band gap (PBG) filter of Minkowiski element and interdigcap shape are used to force the filter response to operate as a multi-frequency band stop filter. With appropriate fractal geometry of Minkowiski and interdigcap elements, wide stop-band at different frequencies are obtained. Continuous sinusoidal fractal slots are also used for the design of a wide passband LPF. Finally, a novel band-pass SIW filter based on complementary split ring resonators (CSRRs) is presented. Different CSRRs cells are etched in the top plane of the SIW for transmission zero control. Band-pass filters are designed using many types of CSRRs (rectangular and circular). Equal length CSRRs are also proposed for the design of dual bandpass filter.