Compact shorted variations of triangular microstripantennas

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Abstract
Equilateral and triangular 30°–60°–90° microstrip antennas have been modified by shorting along the zero field to yield shorted 60 and 30°–sectoral microstrip antennas, respectively. Experimental results on these antennas are presented. The shorted 60 and 30°–sectoral antennas result in area reduction by factors of 2.5 and 5.0, respectively, compared to the equilateral triangular antenna with the same resonant frequency. The frequency is further reduced by partially shorting the curved edges of the sectoral antennas.

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