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Wideband stair-shaped dielectric resonator antennas

Wideband stair-shaped dielectric resonator antennas

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Wideband stair-shaped dielectric resonator antenna (DRAs) are designed. Wide bandwidths are achieved with one-step or two-steps stair geometries. Cricular and square cross-sections are discussed with two different excitation methods: coaxial feed and aperture coupled. The DRAs are designed in the X-band. An impedance bandwidth (S11<−10 dB) of 54.3% is obtained with the two-steps stair-shaped DRA. The antennas have broadside radiation patterns in all cases across the matching band. In addition, embedding the base into another dielectric material reduces the size of the stair-shaped DRA. Simulation results are compared with measurements and reasonable agreement is obtained.

Inspec keywords: dielectric resonator antennas; broadband antennas; antenna radiation patterns

Other keywords: DRA; broadside radiation patterns; excitation methods; wideband stair-shaped dielectric resonator antennas; X-band; cross-sections; aperture coupled method; impedance bandwidth; stair geometries; dielectric material; coaxial feed

Subjects: Single antennas; Other dielectric applications and devices

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