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In this paper, a modified microstrip slot aperture feed is introduced which generates TEσ13 modes in a cubic dielectric resonator antenna resulting in a high gain (simulated = 10.5 dB and measured = 9 dB). The proposed feed can be realized by replacing the rectangular stub of microstrip slot aperture feed with a circular metallic stub of radius 3mm. The proposed feed excites the dielectric resonator antenna around a resonant frequency of 5.78GHz covering 5.725–5.850GHz WIFI band. The antenna exhibits an impedance bandwidth of 130.2MHz, and 135MHz in simulations and measurements respectively, and a stable gain throughout the 5.78GHz WIFI band with a maximum of 9 dB in measurements.

Gain enhancement in cubic DRA with modified microstrip feed for WLAN applications