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The microstrip patch antennas with high-permittivity ceramic substrate is very effective for antenna size reduction. However, the impedance bandwidth obtained for such a microstrip patch antenna is usually very narrow and the antenna gain is also significantly decreased, and that will severely limit its practical applications. Therefore, the enhancement of the bandwidth and gain of a microstrip patch...
By embedding a pair of U-shaped narrow slots close to the non-radiating 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 much as 2.6 times that of a corresponding conventional rectangular microstrip antenna. Details of the proposed designs are described, and experimental results...
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