Abstract
This paper presents a 5 GHz UAV array antenna with a 3×4 reconfigurable feeding network for wide elevation coverage. The proposed array comprises a four-element printed dipole antenna array in the top substrate, two supports with a tapered balun, a self-reflector for gain improvement, and a reconfigurable feeding network in the bottom substrate. For wide beam coverage, the feeding network comprises one RF switch, one Wilkinson power divider, and two 90° hybrid couplers; further, the network achieves wide beam coverage using one broadside beam and two end-fire beams. The measured impedance bandwidth, peak gain, and half-power beamwidth of the proposed array operated from 5.03 to 5.15 GHz are approximately 850 MHz(17 %), 6.7 dBi, and 180°, respectively.
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