A compact multiband dielectric resonator antenna for wireless communications

Abstract

A compact multiband rectangular dielectric resonator antenna (RDRA) is proposed in this study for worldwide interoperability for microwave access, wireless local area network, and fifth‐generation applications. The dielectric resonator antenna is fed by a 2‐slot etched coplanar waveguide with a conformal strip feed, a dielectric resonator with a dielectric constant of 37 is used and embedded into the substrate, and a foam substrate is used as a holder. The RDRA exhibits multiband and omnidirectional radiation patterns by generating a monopole mode as well as the typical and modes, which provides impedance bandwidths (|S11| < −10 dB) of 29.0% at the first band, 15.1% at the second band, and 6.2% at the third band. Additionally, the RDRA achieves a maximum total efficiency of 94.4% at 4.8 GHz and an overall total efficiency of 70% at the desired frequency bands.

Wideband CPW-Fed Oval-Shaped Monopole Antenna for Wi-Fi5 and Wi-Fi6 Applications

“…3. The proposed antenna is very thin and can be used in next-generation wireless devices (with slim characteristics) as it has less thickness (low in profile) than [1][2][3][4][6][7][8][9][10][11]]. 4.…”

“…5. It does not require any 3-dimensional structure [1], additional ground plane [8], or reactive component [9] for the excitation of required bands. 6.…”

“…Several antenna design techniques that exhibit multiband or wideband operations have been reported in the literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] for wireless applications. Amid these designs, dielectric resonator antennas (DRAs) are very popular as they offer high dielectric strength and no inherent conductor loss, which results in better radiation efficiency.…”

“…Amid these designs, dielectric resonator antennas (DRAs) are very popular as they offer high dielectric strength and no inherent conductor loss, which results in better radiation efficiency. An example of such a design has been investigated in [1], in which a DRA antenna with dimensions of 14 × 30 × 8 mm 3 has been designed for multiband operation in the WiMAX (3.4-3.69 GHz), 5G (3.3-3.6 GHz), and WLAN (5.72-5.80 GHz) bands. In [2], even though the Artificial Magnetic Conductor (AMC) applied can increase the gain of the antenna, as well as achieving multiband operations in (2.13-2.87 GHz), (3.22-4.75 GHz) and (5.54-5.86 GHz) bands, and the planar size of the antenna has a larger area of 37.26 × 37.26 mm 2 .…”

“…To achieve very small dimensions of 17.5 × 8 mm 2 , Reference [6] has presented a simple multifrequency monopole antenna operating in 2.4 GHz, 3.3 GHz, and 5.8 GHz bands. Notably, the antenna designs reported in [1][2][3][4][5][6] do not cover the complete Wi-Fi 5 bands. Even though the patch antenna design in [7] has a size of 34.6 × 33.05 × 1.57 mm 3 and can cover the entire Wi-Fi 5 band, the design has used an expensive Roger substrate to fabricate the antenna.…”