Band-Notched Ultrawide Band Planar Inverted-F Antenna

<table>Impedances <svg height="15.0875" id="M45" style="vertical-align:-2.3205pt" version="1.1" viewbox="0 0 37.012501 15.0875" width="37.012501" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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l-26 29t-28 35.5l-23 37.5t-20.5 43t-12 45.5t-5.5 51q0 133 88 218.5t219 85.5q132 0 218 -83t86 -218q0 -40 -11.5 -78t-33 -71.5t-39 -56t-44 -51t-32.5 -35.5h84q35 0 48 12t31 63z" id="x3A9"></path></g><g transform="matrix(.017,0,0,-.017,31.068,12.138)"><path d="M275 270q0 -296 -211 -440l-19 23q75 62 116.5 174t41.5 243t-42 243t-116 173l19 24q211 -144 211 -440z" id="x29"></path></g>
</svg> versus frequency (GHz).</table>

International Journal of Antennas and Propagation

Band-Notched Ultrawide Band Planar Inverted-F Antenna

Figure 5