ISSTT Proceedings

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A 350 GHz Finline Mixer Fed by a Hom-Reflector Antenna

Authors:
G. Yassin, S. Withington, M. Buffey, K. Jacobs, S. Wulff
Abstract:
In this paper we describe the design and preliminary results of testing a tunerless finline mixer over the frequency range of 330-360 GHz. The mixer is fed by a conical horn-reflector antenna, machined into an aluminium split block to ensure that the mixer has low sidelobe level and high aperture efficiency, without the employment of a phase correcting lens. The mixer chip itself comprises an antipodal finline taper and a miniature microstrip line, which contains an Nb/Al-oxide/Nb junction. Our preliminary test of the mixer at 4.7 K yielded receiver noise temperature of about 90 K DSB which includes some IF and RF losses. The measured beam pattern of the conical horn reflector antenna was in excellent agreement with the computed results.
Categories:
Receivers, SIS Mixers
Year:
1998
Session:
5
Full-text:
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Page Number(s):
205-213