Offset Cross-Slot-Coupled Dielectric Resonator Antenna for Circular Polarization

Abstract

Abstract-A cross-slot-coupled cylindrical dielectric resonator antenna (DRA) is studied theoretically and experimentally. In previous papers, a cross-slot of unequal slot lengths was centered under the dielectric resonator (DR), resulting in circular polarized operation of the antenna. In the present study, the design is enhanced by setting the centers of the two slots at different positions and taking into consideration the partial independence of the slot modes from the DRA mode. Thus, circular polarization (CP) bandwidth of up to 4.7% is attained experimentally in the broadside direction. It is also shown that a largely asymmetrical structure results in a very high bandwidth, but with the tradeoff of distorted CP operation off-broadside.

High-permittivity cross-shaped dielectric resonator antenna for circular polarization

“…Recently, some research works have demonstrated relatively wideband circularly polarized (CP) performance of DRAs, which are, for example, useful for satellite communications to overcome polarization rotation effects due to the atmosphere. Some designs employ canonical antenna geometries, including, rectangular [4], cylindrical [5,6] and cross [7] shapes, combined with simple feed configurations, such as probe [8], slot aperture [5] and vertical strips [9]. The achieved broadside CP bandwidth of such structurally simple antennas remains normally below 7%.…”

Design of High Gain Novel Dielectric Resonator Antenna Array for 24 GHz Short Range Radar Systems

“…al. [12] in 1983, and since then they have been widely studied [13]. Before that, dielectric resonators were used for applications in microwave circuits [14].…”

Investigation of a Cross-Slot-Coupled Dual-Band Circularly Polarized Hybrid Dielectric Resonator Antenna

“…As we know, antennas with circular polarization (CP) [15][16][17][18][19][20][21][22][23][24][25] can reduce polarization mismatch between transmitting and receiving antennas in wireless communication systems. However, most of the previous work on the hybrid DRAs, which makes use of the resonance of the feeding structure, was primarily concentrated on linearly polarized designs.…”