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

Jurgensen, Guilherme

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

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

Handle URL

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

Copyright and License Information

Copyright 2023 Guilherme Jurgensen

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