Polarisation reconfigurable anisotropic dielectric resonator antenna

Area of Science:

• Electromagnetics and Wireless Communication
• Antenna Theory and Design
• Signal Processing

Background:

• Traditional wireless systems often underutilize the polarization domain for information transmission.
• Reconfigurable antennas are crucial for adapting to dynamic wireless environments and improving communication efficiency.

Purpose of the Study:

• To present a novel polarization reconfigurable anisotropic dielectric resonator antenna (ADRA).
• To introduce a new modulation scheme exploiting polarization for enhanced wireless communication.
• To demonstrate an antenna capable of generating arbitrary polarization states.

Main Methods:

• The proposed ADRA utilizes periodic dielectric resonators with varying dielectric constants, a metal strip, a varactor diode, and PIN diode switches.
• A novel modulation scheme is employed, leveraging the tilt angle and axial ratio (AR) of wireless signals.
• Antenna performance was validated through simulations and post-fabrication measurements.

Main Results:

• The modulation scheme significantly improves bit error rate (BER) and spectral efficiency (bits/s/Hz/antenna).
• The antenna demonstrated robust performance across various polarization states, from circular polarization (CP) to linear polarization (LP).
• Achieved total efficiency over 93%, consistent gain around 7.64 dBi, and a wide impedance matching bandwidth (3.53–3.91 GHz).

Conclusions:

• The developed ADRA and modulation scheme offer a powerful system for advanced wireless communication.
• Polarization modulation provides a valuable degree of freedom for enhancing spectral efficiency and BER performance.
• Experimental validation confirms the robust and efficient operation of the proposed reconfigurable antenna system.