A Compact Wideband Rectangular Dielectric Resonator Antenna using Perforations and Edge Grounding

Abstract

Abstract-A compact wideband Rectangular Dielectric Resonator Antenna (RDRA) is investigated and presented. Perforations improve bandwidth by lowering down the quality factor. The perforations are an array of symmetrical square shape slots drilled uniformly on the RDRA. On choosing the optimal size of slots and distance between two consecutive slots, the fundamental TE 111 mode of the RDRA is preserved. This aids in making the geometry compact by employing edge grounding. The coaxial probe acts like a monopole which further improves bandwidth by matching, monopole and higher order TE 131 like mode of the RDRA in the frequency band (2.72 -4.3 GHz). The proposed geometry offers a wide impedance bandwidth of 56% for S 11 < -10 dB. The measured results show that the radiation efficiency of the proposed antenna is above 85% for the complete bandwidth with the stable radiation pattern.

A wideband stacked dielectric resonator antenna for 5G applications

“…The antenna radiates in a broadside direction and the cross‐polarization levels of lower than −25 dB are preserved within ±45° beamwidth. A comparison of the proposed antenna with other wideband DRAs is tabulated in Table , which shows that the antenna has a wider impedance bandwidth than that in References and while has more stable radiation pattern, higher gain, and lower cross‐polarization levels than those in References 11, 13, 16, and.…”

“…In recent years, several advanced techniques are developed to solve the DRA's fabrication and positioning issue in an array, making it more competitive in future wireless communication systems. Some efforts have been done on the design of wideband DRAs . In Reference , the reported DRA can achieve a bandwidth of 35% by using stacking technology, but the DRs' sizes need to be different.…”

“…Some efforts have been done on the design of wideband DRAs. [7][8][9][10][11][12][13][14][15][16][17][18] In Reference 7, the reported DRA can achieve a bandwidth of 35% by using stacking technology, but the DRs' sizes need to be different. The dual-mode operation of the DRAs has been exploited for bandwidth enhancement in References 8-10 by adjusting the length-toheight ratio.…”

A-shaped wideband dielectric resonator antenna for wireless communication systems and its MIMO implementation

“…Since, the proposed structure is the perturbed version of equilateral triangular DR, therefore, the resonant frequency of both the modes get shifted to the higher side because of reduction in the effective permittivity. This reduction in the effective permittivity also helps to improve the bandwidth by lowering down the quality factor (Q (ɛ eff ) P with P ≥ 1) …”

“…1). 30 Figure 3A shows the simulated response of the proposed antenna for different values of feed length F H and the pronounce effect on impedance matching is observed. It is observed form the figure that the feed length, F H 5 7.5 mm provides good matching throughout the desired frequency band.…”