Date of Award

Fall 2012

Document Type


Degree Name

Master of Science (MS)


Electrical and Computer Engineering

First Advisor

Richie, James

Second Advisor

Luglio, Juan

Third Advisor

Lee, Chung Hoon


Phase shifters are two-port microwave devices which take an input signal and output a phase shifted version of the signal. These devices can be used in phased antenna arrays, frequency translators, and IQ modulator/demodulator systems. The goal for this work is to construct a hybrid coupler phase shifter which will provide a 90 degree phase shift to a signal with a center frequency of 1800 MHz over a 5% bandwidth. This work is novel because the hybrid coupler phase shifter has not been extensively studied. Some papers have provided rough guidelines for constructing these shifters, but there is little exploration of performance. This work uses RF Sim as a simulation tool to provide design analysis, and experimental work was performed in the RF laboratory at the Marquette University College of Engineering. The basis for the design of the phase shifter comes from idealized design guidelines found in white papers. Realistic effects inherent in the design are shown in the final results. Updated simulation results are provided which provide compensation for these effects to achieve the desired performance.