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In this paper, quasi-optics and its application in millimeter waves and THz bands are introduced. Firstly, a quasi-optical monopulse antennas are illuminated, one is combination of lenses and quasi optical sum difference network; another consists of beam guide and quasi optical sum difference network. The simulations and experimental results are presented. Then, quasi optical beam power combining...
A low-cost radiometric temperature sensor system is described, with emphasis on the use of a 12.5 GHz near-field focused microstrip array to provide a low-profile compact product suitable for commercial and industrial applications. An overview of the temperature sensor system is given, followed by design details of the focused microstrip array, including near-field patterns and antenna efficiency...
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