Highly Directional Small-Size Antenna Designed with Homogeneous Transformation Optics

<table>The <svg height="8.4250002" id="M34" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 8.5874996 8.4250002" width="8.5874996" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg>-directed electrical field distribution when a naked small current plane with width <svg height="11.225" id="M35" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 62.837502 11.225" width="62.837502" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg>m is located in (a) free space and (b) square metamaterial substrates, respectively. (c) <svg height="15.4875" id="M36" style="vertical-align:-3.25793pt" version="1.1" viewbox="0 0 17.4125 15.4875" width="17.4125" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg> field distribution while a large current plane with the width 0.8 m is radiating in free space.</table>

International Journal of Antennas and Propagation

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Figure 2

Figure 2: Highly Directional Small-Size Antenna Designed with Homogeneous Transformation Optics 