الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Substrate integrated waveguide (SIW) is a recent technology that compromises between the advantages of the rectangular waveguide and the microstrip. On the other hand, it overcomes the hurdle of radiation loss and low power handling capacity for the microstrip technology and the obstacle of non-integrable and complexity of transitions of the waveguide technology as well as its higher cost and heavy weight with large dimensions. So SIW introduces compatible devices that are light in weight and can be implemented with smaller dimensions and lower costs. In this thesis analysis, simulation, and implementation of microwave devices and antennas by SIW technology have been done after choosing the appropriate dielectric material. The simulated parameters of the devices and antennas using the HFSS simulator helped to integrate them to form multiple systems to meet the requirements of different applications. A wraparound rhombic divider with two different ports in phase due to a phase shifter at one side was integrated with two subarrays of a combination of lambda shape slots and hexagonal diamond shape fractal antenna to introduce a system that works in several frequency bands for applications such as wireless communication systems for Ku-band and X-band missile guidance. In a second system and depending on binomial feeding according to the Pascal triangle, a 6-port SIW directional coupler is designed to excite three sub-arrays of twelve radiating elements of the SIW slot antenna to make the system applicable for X-band missile guidance system. While in a third system, a -3dB directional coupler that provides an operating frequency range from 8.31 to 9.67 GHz and two (E-plane) tee junctions working from 8.8 to 12 GHz have been designed. These are then integrated to feed 4-array composed of wideband slots that include rectangular and ring shape slots that are excited with different phase shift excitations for radar applications. In the penultimate design, a six-weighted output ports divider based on the Taylor coefficient to reduce SLL to -30 dB was integrated with an antenna array of six sub-arrays with 6××10 slots. These slots (10) are distributed in each sub-array with specific distances from the center line to reveal Taylor distribution to achieve -30 dB. The divider has 2 GHz bandwidth from 8 to 10 while in the slotted column, 8.2 to 9.7 GHz has been achieved. Finally, a compact microwave substrate integrated waveguide power limiter (SIWL) has been studied, fabricated, and compared with arectangular waveguide resulting in a reduced size from 822mm cubed to 116mm cubed to safeguard low-power receivers to meet the needs of low-power portable radar and 5G applications.