Terahertz Harmonic Operation of Microwave Fresnel Zone Plate Lens and Antenna: Frequency Filtering and Space Resolution Properties

<table>Harmonic-action FZP lens at (a) 3rd harmonic frequency <svg height="14.625" id="M90" style="vertical-align:-3.25793pt" version="1.1" viewbox="0 0 14.8875 14.625" width="14.8875" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.625)">
<g transform="translate(72,-60.3)">
<text transform="matrix(1,0,0,-1,-71.95,63.6)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝑓</tspan>
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<text transform="matrix(1,0,0,-1,-65.01,60.47)">
<tspan style="font-size: 8.75px; " x="0" y="0">3</tspan>
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</g>
</g>
</svg>  and (b) 5th harmonic frequency <svg height="14.625" id="M91" style="vertical-align:-3.25793pt" version="1.1" viewbox="0 0 14.8875 14.625" width="14.8875" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.625)">
<g transform="translate(72,-60.3)">
<text transform="matrix(1,0,0,-1,-71.95,63.6)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝑓</tspan>
</text>
<text transform="matrix(1,0,0,-1,-65.01,60.47)">
<tspan style="font-size: 8.75px; " x="0" y="0">5</tspan>
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</g>
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</svg>.</table>

International Journal of Antennas and Propagation

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Figure 2

Figure 2: Terahertz Harmonic Operation of Microwave Fresnel Zone Plate Lens and Antenna: Frequency Filtering and Space Resolution Properties 