By loading a pair of narrow slots close to the radiating edges of a bow-tie microstrip antenna, dual-frequency operation can be obtained using a single probe feed. Various frequency ratios, within the range 2.0 – 3.0, of the two operating frequencies can be obtained by varying the flare angle of the bow-tie patch. Details of the antenna design and experimental results are presented and discussed.
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Wong et al. (1998) studied this question.
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