Radiation-Enhancement Properties of an X-Band Woodpile EBG and Its Application to a Planar Antenna

<table>H-plane radiation pattern (dB) of the woodpile-covered patch antenna, normalized to its maximum value, when <svg height="15" id="M142" style="vertical-align:-2.22495pt" version="1.1" viewbox="0 0 59.799999 15" width="59.799999" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,12.162)"><path d="M499 88q-41 -46 -83.5 -73t-68.5 -27q-41 0 -19 98l52 225q10 43 8 59.5t-16 16.5q-37 0 -112 -65t-117 -135q-14 -42 -38 -179q-36 -7 -75 -20l-7 8l127 594q8 40 2.5 49t-35.5 9h-35l5 25q36 3 71.5 13t56.5 18t25 8q11 0 3 -38l-88 -417h2q77 102 195 167q44 24 79 24
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</svg> and <svg height="11.075" id="M143" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 16.4375 11.075" width="16.4375" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,10.8)"><path d="M447 623l8 -12l-283 -613l-74 -10l-7 11q174 283 297 551h-216q-48 0 -62.5 -12t-33.5 -63h-29q10 60 18 148h382z" id="x37"></path></g><g transform="matrix(.017,-0,0,-.017,8.222,10.8)"><path d="M456 178h-96v-72q0 -51 12.5 -62.5t72.5 -16.5v-27h-256v27q65 5 78 17t13 62v72h-260v28q182 271 300 426h40v-407h96v-47zM280 225v295h-2q-107 -148 -196 -295h198z" id="x34"></path></g>
</svg> mm. The bars nearest to the patch are parallel to the electric field.</table>

International Journal of Antennas and Propagation

fig20

Figure 20

Figure 20: Radiation-Enhancement Properties of an X-Band Woodpile EBG and Its Application to a Planar Antenna 