Wideband Millimetre-Wave Dielectric Resonator Antenna Fed by a Wide Aperture

Wideband Millimetre-Wave Dielectric Resonator Antenna Fed by a Wide Aperture

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This work presents a millimetre-wave (mmW) dielectric resonator antenna (DRA) excited by a wide aperture for bandwidth enhancement on the DRA and its array.The Jewelry Dish Gift Box proposed antenna consists of a rectangular DRA top loaded with a metallic patch to produce two DRA modes on the radiator.The wide aperture is etched on the top metallic surface of a substrate-integrated waveguide (SIW) for contributing a slot mode and exciting the DRA.

The proposed aperture is relatively wider than the conventional means of aperture-coupled DRAs, its size is almost identical to the base area of the DRA.An intensive parametric study proved using a wide aperture for excitation can lower the reactance of the higher-order mode of the DRA and thus expand the bandwidth.In addition, a 16-element DRA array with a 1-to-8 full corporate feeding network is introduced.

A prototype of the array was fabricated and measured.The array exhibits a wide impedance bandwidth of 35.5% from 25.

5 to 36.5 GHz for the reflection coefficient ≤ −10 dB and the maximum gain of 18.5 dBi.

Throughout the Ignition Removal Tool operating bandwidth, stable broadside radiation patterns can be observed.A good agreement between the measured and simulated results can be obtained, which confirms these proposed designs found potential applications in the mmW wireless communication systems.