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Single Transmitter Direction Finding Using a Single Moving Omnidirectional Antenna
Guy Eliyahu1, Amnon Menashe Maor1, Roei Meshar2
1Elisra-Elbit Ltd., Holon 5885118, Israel.
Sensors (Basel, Switzerland)
|December 11, 2022
Summary
This study introduces a novel single-antenna direction-finding system. By tracking phase changes as the antenna moves, it estimates the Angle-of-Arrival (AOA) of a transmitter, offering a cost-effective alternative to multi-antenna systems.
Area of Science:
- Signal Processing
- Antenna Theory
- Electromagnetics
Background:
- Traditional direction-finding relies on multiple antennas to estimate Angle-of-Arrival (AOA).
- These systems require precise synchronization and can suffer from mutual antenna coupling and higher costs.
- A need exists for simpler, more cost-effective direction-finding solutions.
Purpose of the Study:
- To investigate the feasibility of using a single moving antenna for Angle-of-Arrival (AOA) estimation.
- To analyze the performance and limitations of a single-antenna direction-finding sensor.
- To validate the proposed method through simulations and hardware measurements.
Main Methods:
- A single antenna is moved while tracking phase changes of a stable transmitted signal.
- Performance analysis is conducted using theoretical calculations and simulations.
- Experimental validation is performed using a hardware setup.
Main Results:
- A single moving antenna can effectively estimate the Angle-of-Arrival (AOA) under specific conditions.
- Advantages include reduced sensor size, cost, and elimination of multi-receiver synchronization and coupling issues.
- Challenges involve precise antenna positioning, transmitter phase stability, modulation, and movement.
Conclusions:
- The single-antenna direction-finding approach is a viable and potentially advantageous alternative to traditional multi-antenna systems.
- Further research is needed to address challenges related to signal instability and movement.
- The proposed sensor demonstrates potential for cost-effective and compact direction-finding applications.
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