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Ultrawideband Double Rhombus Antenna With Stable Radiation Patterns for Phased Array Applications

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1 Author(s)
Eldek, A.A. ; Dept. of Comput. Eng., Jackson State Univ., MS

A broadband microstrip-fed printed antenna is proposed 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. A modified array configuration is proposed to further enhance the antenna radiation characteristics and usable bandwidth. Scanning capabilities are studied for a four-element array. The proposed antenna provides endfire radiation patterns with high gain, high front-to-back (F-to-B) ratio, low cross-polarization level, wide beamwidth, and wide scanning angles in a wide bandwidth of 103%

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Antennas and Propagation, IEEE Transactions on  (Volume:55 ,  Issue: 1 )