Esi̇gn of frequency selecti̇ve surfaces for x-band applications

This study aims to investigate the effects of unit cell arrays and frequency variations on the operating principles of Frequency Selective Surfaces (FSS). Frequency Selective Surfaces are structures that act as band-pass or band-stop filters by allowing or blocking electromagnetic waves at specific frequency ranges. Within the scope of this thesis, different unit cell arrangements and geometric parameters of FSS structures were analyzed in detail, and their impact on performance was thoroughly examined. CST Studio software was utilized as the primary method, and numerical modeling and simulation techniques were applied. Through the simulations, the frequency responses of FSS structures and their behavior against electromagnetic waves incident at various angles were systematically revealed. Performance analyses of band-pass and band-stop structures were conducted, and their ability to control the electromagnetic spectrum was observed. The findings demonstrate that FSS structures can be effectively employed in defense industry systems (e.g., radar, satellite communication, electromagnetic signal shielding) and civilian applications (e.g., wireless communication systems, smart building designs). Particularly in military applications, FSS structures can significantly contribute to critical tasks such as signal shielding and direction control. This study aims to contribute to improving the performance of Frequency Selective Surfaces and developing optimized designs for various application areas. Additionally, it serves as a reference source for future research in this field.