Abstract
Planar Schottky diodes are integrated with bow-tie antennas to form a one-dimensional array. The energy is focused onto the antennas through a silicon lens placed on the back of the gallium-arsenide substrate. A polystyrene cap on the silicon lens reduces the reflection loss. A self-aligning process with proton isolation has been developed to make the planar Schottky diodes with a 1.1-THz zero-bias cutoff frequency. The antenna coupling efficiency and imaging properties of the system are studied by video detection measurements at 94 GHz. As a heterodyne receiver, a double-sideband mixer conversion loss of 11.2 dB and noise temperature of 3770°K have been achieved at a local oscillator frequency of 91 GHz. Of this loss, 6.2 dB is attributed to the optical system and the antenna.
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Zah, Ce., Kasilingam, D., Smith, J.S. et al. Millimeter wave monolithic schottky diode imaging arrays. Int J Infrared Milli Waves 6, 981–997 (1985). https://doi.org/10.1007/BF01010676
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DOI: https://doi.org/10.1007/BF01010676