University of Illinois Urbana-Champaign

Investigation of a reconfigurable GPS antenna for direction finding and nulling applications

Jurgensen, Guilherme

This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.

Permalink

https://hdl.handle.net/2142/120458

Description

Title
Investigation of a reconfigurable GPS antenna for direction finding and nulling applications
Author(s)
Jurgensen, Guilherme
Issue Date
2023-05-04
Director of Research (if dissertation) or Advisor (if thesis)
Bernhard, Jennifer T
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
  • direction finding
  • GPS
  • antenna
  • reconfigurable antenna
Abstract
In wireless communication systems, the presence of spoofers and jammers present a concern in various applications, such as with Global Positioning System (GPS) signals. This creates a need for the system to have the ability to differentiate spoofed signals from true ones and preferably mitigate them. In this thesis, an antenna capable of performing these functions is presented in the form of a hemispherical spiral, or "hemispiral," antenna. The antenna operates via differential feeding, producing a steerable null in its radiation pattern, which results in distinct patterns to allow for direction of arrival estimation. This thesis presents this already fabricated antenna, then proposes modifications to the structure with the goal of increasing the angular extent of its direction finding region. Preliminary simulation data is presented, followed by experimental data taken to validate simulations. An additional investigation is performed in response to the results obtained in preliminary measurements, and a discussion of this investigation concludes the thesis.
Graduation Semester
2023-05
Type of Resource
Thesis
Copyright and License Information
Copyright 2023 Guilherme Jurgensen

Owning Collections

Graduate Dissertations and Theses at Illinois PRIMARY
Graduate Theses and Dissertations at Illinois