Abstract
In this paper, an ultra wideband microstrip-fed printed antenna is presented for phased antenna array systems. The antenna consists of two parallel modified dipoles of different lengths. The regular dipole shape is modified to a quasi-rhombus shape by adding two triangular patches. Using two dipoles helps maintain stable radiation patterns close to their resonance frequencies. The proposed antenna provides endfire radiation patterns with high gain, high front-to-back ratio, low cross polarization level, wide beamwidth, and wide scanning angles in a wide bandwidth of 103%.
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