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A Bidirectional Quasi-Endfire Patch Antenna with Low Elevation Angle
Ziling Zhou1, Jin Shi1,2, Gu Liu1
1School of Information Science and Technology, Nantong University, Nantong 226019, China.
Micromachines
|June 27, 2024
Summary
This study presents a novel bidirectional quasi-endfire patch antenna with a low elevation angle, ideal for vehicle, airborne, and shipborne wireless communications. The antenna achieves a ±28° low elevation angle and a compact structure, outperforming existing designs.
Area of Science:
- Electromagnetics and Wave Propagation
- Antenna Theory and Design
- Wireless Communication Systems
Background:
- Vehicle-based, airborne, and shipborne wireless systems require antennas with low elevation angles for efficient communication.
- Existing dual-beam patch antennas often lack the desired low elevation angle or compact structure.
Purpose of the Study:
- To design and demonstrate a novel bidirectional quasi-endfire patch antenna with a significantly low elevation angle.
- To achieve a compact antenna structure suitable for mobile wireless communication platforms.
Main Methods:
- Integration of shortened patch resonators and an open patch resonator.
- Utilizing TM20 mode for bidirectional radiation and TM01/TM20 modes in shortened resonators for beam tilting.
- Fabrication and measurement of a prototype antenna operating at 3.5 GHz.
Main Results:
- The proposed antenna achieves a low elevation angle of ±28°.
- Demonstrated a -10 dB impedance matching bandwidth from 3.44 GHz to 3.61 GHz.
- A prototype with two pairs of directors further reduced the elevation angle to ±19°.
Conclusions:
- The developed bidirectional quasi-endfire patch antenna offers a superior low elevation angle and compact size compared to existing designs.
- The antenna is well-suited for demanding wireless communication applications in mobile environments.
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