802GHz integrated horn antennas imaging array |
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Authors: | Walid Y Ali-Ahmad Gabriel M Rebeiz Hemant Davé and Gordon Chin |
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Institution: | (1) NASA/Center for Space Terahertz Technology Electrical Engineering and Computer Science Department, University of Michigan, 48109-2122 Ann Arbor, MI;(2) Planetary Systems Branch, NASA/Goddard Space Flight Center, 20771 Greenbelt, MD |
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Abstract: | This short paper presents the pattern measurements at 802GHz of a single element in a 256-element integrated horn imaging array. The integrated-horn antenna consists of a dipole-antenna suspended on a 1 m dielectric membrane inside a pyramidal cavity etched in Silicon. The theoretical far-field patterns, calculated using reciprocity and Floquet-modes representation of the free-space field, agree well with the measured far-field patterns at 802GBz. The associated directivity for a 1.40 horn aperture, calculated from the measured E and H-plane patterns is 12.3dB±0.2dB. This work demonstrates that high-efficiency integrated-horn antennas are easily scalable to terahertz frequencies and could be used for radio-astronomical and plasma-diagnostic applications. |
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