ISSTT Proceedings

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Electromagnetic Analysis of Finline Mixers

Authors:
G. Yassin, S. Withington, R. Padman
Abstract:
We describe the electromagnetic design of antipodal fmline SIS mixers. An important part of the mixer is the section of antipodal finline which transforms the high impedance of the waveguide ([approx.] 300[Omega]) to the low impedance of the microstrip ([approx.] 15 [Omega]) in which the tiinnel junction is located. We review the numerical methods that were used to calculate the electrical properties of the finlines, taking into account the finite thickness of the metallisation. We also explain how the transmission line taper was synthesized using an optimum taper method. The design procedure is illustrated by outlining the experimental behaviour of a 230GHz mixer, and scale model results are presented for a mixer which is currently being developed for 345 GHz.
Categories:
Devices, Waveguides
Year:
1997
Session:
7
Full-text:
Download a PDF of this paper.
Page Number(s):
344-354