Michael E. MacDonald

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In this paper, we present terahertz bandpass filters composed of resonant arrays of crossed slots in lossy metal films deposited on dielectric membranes. The filters exhibit insertion loss as low as 1.9 dB at room temperature and 1.2 dB at 77 K at a center frequency of 2.2 THz. It is found that the dielectric substrate introduces a downward shift in(More)
In 2010 the Haystack 37 meter reflector was replaced with a new antenna. This work presents measurements of the spatial and temporal thermal behavior of the antenna and its radome under diurnal and seasonal forcing. Values for thermal capacity and resistance of the antenna structure and radome are derived. The convective heat transfer coefficient acting on(More)
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