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Design of a Circularly Polarized Micro-Strip Antenna for Aircraft Tracking Based on BeiDou III Compatible with
1Key Laboratory of Civil Aircraft Airworthiness Technology, Civil Aviation University of China, Tianjin 300300, China.
Micromachines
|November 25, 2023
Summary
A new miniaturized right-handed circularly polarized micro-strip antenna was developed for multi-navigation systems. This antenna enhances axial ratio bandwidth and is suitable for GPS, Galileo, and BDS-3 applications.
Area of Science:
- Electromagnetics and Antenna Engineering
- Satellite Navigation Systems
Background:
- Multi-navigation systems require antennas capable of receiving signals from various satellite constellations.
- Existing antennas may face limitations in terms of size, bandwidth, and axial ratio performance for these applications.
Purpose of the Study:
- To design and validate a miniaturized right-handed circularly polarized (RHCP) micro-strip antenna.
- To achieve enhanced bandwidth for both return loss and axial ratio.
- To ensure compatibility with multiple global navigation satellite systems (GNSS).
Main Methods:
- A 70 mm × 70 mm × 2 mm micro-strip antenna was designed on an FR4 substrate.
- Miniaturization was achieved using a meandering technique on the patch layer.
- Asymmetrical defected ground structures (DGS) were implemented to improve axial ratio bandwidth.
Main Results:
- The antenna operates effectively within the L1/E1/B1 frequency bands (1.540 GHz to 1.612 GHz).
- A significant bandwidth for the axial ratio was achieved between 1.554 GHz and 1.601 GHz.
- The antenna demonstrated suitability for GPS, SBAS, Galileo, and BDS-3, including aircraft tracking.
Conclusions:
- The proposed RHCP micro-strip antenna meets the requirements for multi-navigation system applications.
- The design successfully balances miniaturization with wide-band performance.
- The antenna is a viable solution for next-generation satellite navigation receivers.
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