Wideband Patch Antenna with Shorting Vias

<div>Simulated input impedance and |<i>S</i><sub>11</sub>| without and with annular ring and shorting vias. (a) Input impedance. (b) |<i>S</i><sub>11</sub>|.</div>

International Journal of Antennas and Propagation

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Figure 2

Figure 2: Wideband Patch Antenna with Shorting Vias 