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Dual-circularly polarized flat-top-beam transmitarray antenna with flexible energy allocations
Optics Express
|July 30, 2025
Summary
This study presents dual-circularly polarized (CP) transmitarray antennas (TAs) that create independent flat-top beams for satellite communications. These antennas offer tailored gain differences and wide-angle scanning capabilities.
Area of Science:
- Electromagnetics and Wave Propagation
- Antenna Theory and Design
- Wireless Communications
Background:
- Satellite communication and radar systems require advanced antenna solutions for evolving demands.
- Dual-circularly polarized (CP) antennas are crucial for mitigating interference and enhancing signal quality.
- Transmitarray antennas (TAs) offer advantages in terms of size and efficiency for beamforming.
Purpose of the Study:
- To investigate dual-CP transmitarray antennas (TAs) for generating spin-decoupled flat-top beams.
- To achieve customized gain differences between dual-CP beams.
- To demonstrate wide-angle beam-scanning capabilities for advanced communication systems.
Main Methods:
- Developed a high-efficiency receiver-transmitter element with independent phase and amplitude control for dual-CP waves.
- Employed a modified intersection approach to synthesize distinct fan-shaped and circular flat-top beams for LHCP and RHCP channels.
- Implemented and simulated three TAs with varying gain differences (-6, 0, 6 dB) and experimentally validated the 6 dB case.
Main Results:
- Successfully generated spin-decoupled flat-top beams with precise gain differences between LHCP and RHCP channels.
- Demonstrated tailorable energy allocation capabilities for flexible beamforming.
- Validated wide-angle beam-scanning performance through simulations and experimental measurements.
Conclusions:
- The proposed dual-CP TAs effectively generate high-quality, spin-decoupled flat-top beams with customizable gain differences.
- The developed antenna elements and synthesis approach enable flexible energy allocation for dual-CP signals.
- Experimental validation confirms the practical applicability of these TAs for advanced satellite and radar systems.
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