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In this paper we present the design, fabrication and demonstration of an X-band phased array capable of wide-angle scanning. A new non-symmetric element for wideband tightly coupled dipole arrays is integrated with a low-profile microstrip balun printed on the array ground plane. The feed connects to the array aperture with vertical twin-wire transmission lines that concurrently perform impedance matching. The proposed element arms are identical near the center feed portion but dissimilar towards the ends, forming a ball-and-cup. A 64 element array prototype is verified experimentally and compared to numerical simulation. The array aperture is placed λ/7 (at 8 GHz) above a ground plane and shown to maintain a VSWR < 2 from respectively.

This letter presents a miniature L-band (770-1700 MHz) crossed bowtie antenna with integrated microstrip matching network and balun. Curved bowtie edges are employed for miniaturization and maintain nearly constant input impedance. The antenna provides dual linear polarization with greater than 5 dBi gain and exhibits a return loss greater than 10 dB when placed 1.5 in ( 10 at 770 MHz) above a ground plane.Index Terms-Bowtie antennas, broadband antennas, dual-polarized antennas, L-band.

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