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A Compact Broadband Common-Aperture Dual-Polarized Antenna for Drone Applications.
Xue-Ping Li1,2, Chao-Liang He1, Jun-Fei Ji1
1College of Electronic and Electrical Engineering, Henan Normal University, Xinxiang 453600, China.
Micromachines
|January 25, 2025
Summary
A new miniaturized antenna offers wideband and dual-polarized capabilities. This common-aperture design integrates circularly polarized and linearly polarized antennas for applications like drone detection.
Area of Science:
- Electromagnetics and Microwave Engineering
- Antenna Theory and Design
Background:
- Miniaturized antennas are crucial for modern wireless systems.
- Achieving dual-polarization and wideband performance in a single aperture presents significant design challenges.
Purpose of the Study:
- To propose and validate a novel common-aperture miniaturized antenna.
- To achieve simultaneous wideband and dual-polarized operation (circularly polarized and linearly polarized).
Main Methods:
- Design of a stacked antenna structure with a circularly polarized (CP) antenna on top and a linearly polarized (LP) antenna below.
- Incorporation of an asymmetrical ground, patch, and T-type feed for the CP antenna.
- Utilizing a meshed reflector as a ground plane for the LP antenna and to mitigate CP interference.
- Coaxial feed line integration for the LP antenna through the reflector.
Main Results:
- The antenna operates effectively in the 5.5 GHz to 7.8 GHz frequency range.
- Achieved peak gains of 8.5 dB for CP and 6 dB for LP.
- Demonstrated a 3 dB axial ratio (AR) bandwidth of 34.3% for the CP antenna.
- Exhibited port isolation greater than 15 dB between the two polarizations.
Conclusions:
- The proposed common-aperture antenna successfully integrates wideband CP and LP functionalities.
- The design shows excellent performance metrics, including gain, bandwidth, and isolation.
- Potential applications include relay platforms and drone detection systems requiring versatile signal transmission and reception.
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