A Compact Wideband Dielectric Resonator Antenna With a Meandered Slot Ring and Cavity Backing

作者：Podilchak Symon K^*; Johnstone Jonathan C; Caillet Mathieu; Clenet Michel; Antar Yahia M M

来源：IEEE Antennas and Wireless Propagation Letters, 2016, 15: 909-913.

DOI：10.1109/LAWP.2015.2480547

• Broadband antennas
• circular polarization (CP)
• compact antennas
• dielectric resonator (DR)
• slot antenna

We design a compact cavity-backed antenna structure where a dielectric resonator (DR) element is surrounded by a meandered circular slot ring to enhance radiation efficiency. The DR for the antenna is cylindrical in shape, and four degenerate modes are excited and driven by four, quadrature-fed aperture-coupled slots. Such a compact implementation hybridizes operation of the DR with the miniaturized ring as well as the four aperture-coupled slots for circular polarization. Measured realized gain values are greater than 5 dBic from 1.14 to 1.55 GHz defining a bandwidth of more than 30%. In addition, the half-power and 3-dB axial-ratio beamwidths were measured to be more than 100 and 200, respectively. The proposed design technique to employ such a secondary meandered slot ring may also be useful to improve antenna gain, bandwidth, and efficiency for other antenna and array structures.

• 出版日期2016