A Compact Phase-Controlled Pattern-Reconfigurable Dielectric Resonator Antenna for Passive Wide-Angle Beam Scanning
- 25 November 2020
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 69 (5), 2981-2986
- https://doi.org/10.1109/tap.2020.3030549
Abstract
The function of passive wide-angle beam scanning is desired by base station antenna to provide “green” cellular services. In this paper, such function is realized by designing a compact phase-controlled pattern-reconfigurable Dielectric Resonator Antenna (DRA). The proposed DRA has a compact structure with side length of 0.38λc, and excites fundamental TE and TM modes by diverse ports. By assigning phase between diverse ports, E-plane tilted patterns are synthesized with ±66° scan angles. Its pattern-reconfigurable capability makes contributions for increasing array beam scanning angle and minimizing gain fluctuation. A passive four-element array is verified to have an enhanced beam scanning angle of ±81° with gain fluctuation of 1.25 dB. The maximum gain of the scanning beam is located on the off-axis angle of ±66°, and achieves a wide 3 dB scan coverage of ±105°. Good agreements have been shown between measured and simulated results. The proposed phase-controlled pattern reconfigurable DRA and DRA array have impedance bandwidth of 3.33% (2.95-3.05 GHz) for Sub-6GHz wireless system. They enable the wide-angle beam scanning for base station antenna, and provide a cost-effective passive system for “green” communications.Funding Information
- National Natural Science Foundation of China (61801050, 61871003)
- Southeast University State Key Laboratory of Millimeter Waves (K201904)
- Beijing Key Laboratory of Work Safety Intelligent Monitoring
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