A Multiband Millimeter-Wave Rectangular Dielectric Resonator Antenna with Omnidirectional Radiation Using a Planar Feed

Abstract

In this study, a millimeter-wave (mmWave) dielectric resonator antenna (DRA) with an omnidirectional pattern is presented for the first time. A key feature of the proposed design is the utilization of a planar feed network to achieve omnidirectional radiation from a rectangular DRA, which has not been reported previously in the open literature. In addition, the proposed antenna offers multiband operation with different types of radiation patterns. The degenerate TE121/TE211 modes were excited at 28.5 GHz with an overall internal electromagnetic field distribution that was similar to that of the HEM21δ mode of a cylindrical DRA. The achieved omnidirectional bandwidth and gain were 1.9% and 4.3 dBi, respectively. Moreover, broadside radiation was achieved by exciting the TE111 fundamental mode at 17.5 GHz together with the resonance of the feeding ring-slot at 23 GHz. The triple-band operation offers a highly versatile antenna that can be utilized in on-body and off-body communications. Furthermore, the proposed design was validated through measurements, demonstrating good agreement with simulations.

High gain quasi-omnidirectional dipole array fed by radial power divider for millimeter-wave IoT sensing

“…Other the other hand, the reported antennas with omnidirectional radiation pattern 29 – 32 offer very low antenna gain, while the antenna 29 , and 32 have a gain value of less than 2dBi. A high radiation efficiency is offered by the antenna reported in 31 , however, the antenna suffers from the higher antenna profile. Among the antennas with omnidirectional radiation characteristics 29 – 32 , the proposed antenna offers a higher gain which ensures better wireless sensing capabilities.…”

“…In 22 , a slotted tapered antenna unified with a feeding network built on stacked PCBs is proposed to achieve high gain and unidirectional radiation characteristics for the millimeter-wave IoT applications. While, higher order resonant mode 23 , slotted radiating patch 24 , modified binomial series-fed array 25 , glass-based multilayer antenna integrated with coupling vias 26 , SIW metamaterial 27 , lens operated planar antenna 28 , tapered rectangular monopole with slotted ground 29 , artificial magnetic-conductor 30 , dielectric-resonator 31 , and radial-waveguided dipole array 32 are investigated to achieve multi-band characteristics 23 , 24 , 29 – 31 , high gain 25 , 28 , process accuracy 26 , beam steering 27 , omnidirectional radiation patterns with high gain 29 – 32 . However, the majority of antennas described in the literature for millimeter-wave wireless communication, including Internet of Things applications, are primarily focused on high gain characteristics and provide unidirectional radiation patterns 22 – 28 .…”