Theses and Dissertations - UTB/UTPA

Date of Award


Document Type


Degree Name

Master of Science (MS)


Electrical Engineering

First Advisor

Dr. Junfei Li

Second Advisor

Dr. Heinrich Foltz

Third Advisor

Dr. Jae Sok Son


The objectives of this thesis are to 1) determine how Vivaldi antenna parameters affect the performance and 2) design a Vivaldi antenna with improved overall performance over existing designs. The methodology is to divide the Vivaldi antenna into two parts consisting of microstrip-to-slotline transition and tapered curve part. This has great advantages in finding the relationships between the different antenna parameters and the antenna performance. By combining the methods of improving the impedance- and usable gain bandwidth concluded by the parameter study on the two individual parts, a final Vivaldi antenna design with 10:1 bandwidth is achieved in terms of both types of bandwidth. Measurements from the fabricated Vivaldi antenna show good agreements with the CST simulation results in terms of reflection coefficient, gain and impulse response.


Copyright 2010 Fang Chen. All Rights Reserved.

Granting Institution

University of Texas-Pan American