Abstract
A dual-band patch antenna with two U-shaped slots is experimentally demonstrated. By varying the length of the two arms of each U-shaped slot, the frequency ratio tunable in the range of ∼1.43–1.6 and a considerable antenna size reduction for fixed dual-frequency operation are shown. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 26: 73–75, 2000.
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