Keywords

Phase Shifters, Reconfigurable Filters, Tunable Transmission Zero, Substrate Integrated Waveguide, Coupling Matrix Synthesis

Abstract

Phase shifters play a crucial role in radar, satellite communications, and 5G networks. Recently, the idea of using filters as phase shifters have attracted much interest due to providing many benefits such as smaller area, lower noise figure, easier fabrication method as compared with other technologies, reduced cost, and the ability to work as multi-functioning device. This work focuses on the implementation of bandstop-based and bandpass-based filtering phase shifters. For the bandstop-based approach, some of the resonating structures that were examined are stubs, LC tanks, L-shaped/U-shaped half wavelength resonators and many others. Periodic stub loading filter design method was compared against traditional filter synthesis method in order to determine which approach can provide better insertion loss range, higher phase range, and wider bandwidth. Optimization of stub impedance and the size of the device was presented.

With regards to bandpass-based filtering phase shifters, microstrip-based and substrate integrated waveguide-based designs were investigated. The benefits of microstrip technology include low profile, low cost, ease of fabrication and integration. Microstrip-based designs were implemented using square shaped and octagon shaped split ring resonators. Then, substrate integrated waveguide (SIW) cavity-based designs were proposed and realized using hexagon resonators. The advantages of SIW-based filters are low insertion loss, high power handling, high immunity to external noise and crosstalk. A novel SIW-based filtering phase shifter with tunable transmission zero and tunable center frequency was developed aimed at maximizing device performance.

Completion Date

2024

Semester

Spring

Committee Chair

Gong, Xun

Degree

Doctor of Philosophy (Ph.D.)

College

College of Engineering and Computer Science

Department

Electrical and Computer Engineering

Degree Program

Electrical Engineering

Format

application/pdf

Identifier

DP0028318

URL

https://purls.library.ucf.edu/go/DP0028318

Language

English

Rights

In copyright

Release Date

May 2024

Length of Campus-only Access

None

Access Status

Doctoral Dissertation (Open Access)

Campus Location

Orlando (Main) Campus

Accessibility Status

Meets minimum standards for ETDs/HUTs

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