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By embedding a pair of U-shaped narrow slots close to the nonradiating edges of a rectangular microstrip patch, a single probe-fed microstrip antenna for broadband operation is proposed. Measurements show that the antenna bandwidth can be as large as about 2.6 times that of a corresponding conventional rectangular microstrip antenna. Details of the proposed designs are described, and experimental results are presented and discussed.
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Chen et al. (2000) studied this question.
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