DESIGN AND ANALYSIS OF SIW FILTER AND ANTENNA

Abstract

The rapid advancements in microwave and millimeter-wave systems have necessitated the development of efficient transmission line technologies. Substrate-integrated waveguide (SIW) has emerged as a popular solution, offering a compelling compromise between the losses associated with planar transmission lines and the cost and size challenges of conventional metallic waveguides. In this thesis, we explore the design and analysis of SIW, SIW filters, and antennas. By utilizing a dielectric substrate with conductors acting as ground planes, SIW combines the benefits of planar transmission lines and metallic waveguides, making it an attractive choice for various high-frequency applications. This thesis presents a comprehensive investigation into the potential of SIW technology for designing and optimizing filters and antennas suitable for millimeter-wave systems and wireless communication. The work is structured into eight chapters, each contributing unique insights into SIW technology. The introductory chapter provides an overview of SIW's fundamental geometry and various types, such as Half-Mode Substrate Integrated Waveguide (HMSIW), Substrate Integrated Folded Waveguide (SIFW), and Substrate Integrated Rectangular Waveguide (SIRW). Different analysis techniques employed for SIW, including mode matching, full wave simulation, and other numerical methods, are explored, along with the motivation, objectives, and overall structure of the thesis. A literature survey is conducted in the subsequent chapter, providing a comprehensive review of existing research and studies related to SIW and its applications. This survey not only highlights the state-of-the-art developments in the field but also identifies gaps and opportunities for further advancements. Chapters focusing on specific aspects of SIW technology follow, including the design and analysis of sinusoidally modulated SIW, step-sized SIW using mode matching techniques, and a compact sinusoidally modulated SIFW. These chapters provide detailed insights into the characteristics and performance of SIW-based components, such as their frequency responses, dispersion properties, and filter behaviors. Additionally, a novel SIW-based antenna optimized for self-diplexing applications is introduced, along with the design of three xi distinct HMSIW components: an HMSIW, an HMSIW band-pass filter, and an HMSIW leaky wave antenna. These antenna designs showcase the versatility and potential of SIW technology for wireless communication systems, offering advantages in terms of compactness, efficiency, and multi-frequency operation. The conclusive chapter summarizes the essential discoveries, results, and contributions of the research. It also outlines potential avenues for future exploration and study within the field, presenting directions for further investigation and advancement. The thesis concludes by emphasizing the significance of SIW technology in enabling the development of advanced millimeter-wave systems and wireless communication networks. Overall, this thesis contributes valuable insights into the design and analysis of SIW filters and antennas, offering new possibilities for enhancing the performance and efficiency of communication systems in millimeter-wave and wireless applications. The research presented in this work serves as a valuable resource for those who are working in the field of high-frequency engineering and wireless communication technologies.