Journal
IEEE ANTENNAS AND PROPAGATION MAGAZINE
Volume 52, Issue 5, Pages 251-259Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/MAP.2010.5687559
Keywords
Submillimeter wave antennas; multireflector antennas; scanning antennas; submillimeter wave imaging; radar imaging
Funding
- National Aeronautics and Space Administration
- Department of Defense (DoD)
- Universidad Complutense de Madrid under Spanish Ministry of Science and Innovation
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In this contribution, we present simulations and measurements of a reflector system that can rapidly scan a terahertz beam for a high-resolution standoff-imaging application, without compromising the beam quality. The antenna system utilizes a Gregorian confocal-reflector geometry, with a small mechanical rotating mirror. The system has been successfully fabricated and tested, with THz imagery of targets at a 25 m standoff range being obtained In five seconds, for the current configuration. We also describe how frame rates exceeding 2 Hz can be achieved using a heterodyne array of just a few elements, with or without a multiplexing technique.
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