High Coverage Smart Antenna Design by Using Beam Switched and Non-Reciprocal Method

This dissertation presents two different new designs of array antennas to improve the coverage area as well as reduce the complexity of the design, which is a critical factor in a production level. It also presents a novel concept of non-reciprocity in the array antenna for a full-duplex wireless communication. The dissertation is structured as follow.Chapter one presents the introduction of the dissertation on the phased array antenna, their main factors, and a baseline theory. The second chapter introduces a new beam switched antenna by Dielectric Resonator Antenna (DRA). The designed antenna has a simple geometry and a compact size that can transmit and receive a signal in a wide coverage area. The third chapter in the dissertation presents another approach for a simple beam switch antenna by using a novel CRLH phase shifter. In this design a proposed CRLH transmission line is added to a conventional Butler matrix to increase its resolution coverage while maintaining the simplicity of the structure. In chapter four a novel concept of non-reciprocal antenna is presented. First the theory of Snell’s law is discussed, and it extends to a generalized formula to present a non-reciprocal metasurface, then the idea is expanded to a non-reciprocal antenna by using a unidirectional amplifier. The designed antenna is implemented and measured for validation as well. For the last part of the chapter, a fixed phase shifter is replaced by a tunable phase shifter to develop a non-reciprocal phased array antenna for different full-duplex wireless communications. Finally, chapter 5, concludes with the future works.

Author

• karimian Bahnemiri, reza

Language

• en

Date created

• 2021

Type of Work

• Dissertation

License

• All rights reserved

Rights statement

• In Copyright

GW Unit

• Electrical Engineering

Degree

• Ph.D.

Advisor

• Zaghloul, Mona E
• Ahamdi, Shahrokh

Committee Member(s)

• Nwokoye, Arthur
• Dehghanian, Payman
• Weiss, Steven

Persistent URL

•  https://scholarspace.library.gwu.edu/etd/hx11xg06t