Dual-Polarized Multi-Beam Fixed-Frequency Beam Scanning Leaky-Wave Antenna

Area of Science:

• Electromagnetics and Applied Physics
• Antenna Theory and Design
• Metamaterials and Plasmonics

Background:

• Traditional antennas often have limitations in beam flexibility and polarization control.
• The demand for adaptable antenna solutions is growing for integrated communication networks.

Purpose of the Study:

• To propose and demonstrate a fixed-frequency beam-scanning leaky-wave antenna (LWA) array with switchable dual-polarized beams.
• To enable flexible beam steering and adjustable beam width for enhanced communication capabilities.

Main Methods:

• Utilizing three groups of spoof surface plasmon polaritons (SPPs) leaky-wave antennas with varying modulation periods.
• Incorporating varactor diodes for independent beam steering control at a fixed frequency.
• Configuring the antenna in multi-beam (2-3 beams) and single-beam modes.

Main Results:

• Experimental demonstration of a prototype LWA array operating from 3.3 to 3.8 GHz.
• Achieved maximum beam scanning ranges of approximately 35° in multi-beam mode and 55° in single-beam mode.
• Demonstrated flexible adjustment of beam width by switching between modes.

Conclusions:

• The proposed LWA array offers efficient fixed-frequency beam scanning with switchable dual-polarized beams.
• This technology shows significant potential for space-air-ground integrated networks, satellite communication, and 6G systems.