Superconducting quantum detectors

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Loss in normal and superconducting millimetre-wave and submillimetre wave microstrip transmission line

IEE Conference Publication (1996) 149-154

Authors:

G Yassin, S Withington

Abstract:

We compare two techniques for calculating the loss of millimetre wave and submillimetre wave microstrip transmission line. The first method is based on conformal transformations and the second method is based on spectral domain analysis. The calculation of loss, through the spectral domain technique, is made possible by removing the current singularities from the path of integration and defining an effective width, based on loss. We use our technique to predict the behaviour of miniature submillimetre wave superconducting microstrip transmission line.
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A SEARCH FOR PRIMORDIAL ANISOTROPIES IN THE COSMIC MICROWAVE BACKGROUND-RADIATION - FIRST OBSERVATIONS AT 13.5 GHZ WITH THE COSMIC-ANISOTROPY-TELESCOPE

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 274:3 (1995) 861-868

Authors:

C OSULLIVAN, G YASSIN, G WOAN, PF SCOTT, R SAUNDERS, M ROBSON, G POOLEY, AN LASENBY, S KENDERDINE, M JONES, MP HOBSON, PJ DUFFETSMITH
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ELECTROMAGNETIC MODELS FOR SUPERCONDUCTING MILLIMETER-WAVE AND SUB-MILLIMETER-WAVE MICROSTRIP TRANSMISSION-LINES

JOURNAL OF PHYSICS D-APPLIED PHYSICS 28:9 (1995) 1983-1991

Authors:

G YASSIN, S WITHINGTON
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Finline mixers for imaging arrays

ASTR SOC P 75 (1995) 358-362

Authors:

G YASSIN, R PADMAN, S WITHINGTON
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Spectral-domain analysis of submillimetre-wave microstrip filters

International Journal of Infrared and Millimeter Waves 14:10 (1993) 1975-1984

Authors:

S Withington, G Yassin

Abstract:

We consider the cut-off frequencies of high-order modes in boxed submillimetre-wave microstrip filters. It is shown that many of the filters in use at the present time are not cut off in the way that the designers imagine. It is also shown that for ease of manufacture the height of the microstrip channel should be 0.7 times the width and the thickness of the quartz substrate should be 0.5 times the width. This optimum geometry suggests that the upper frequency limit of conventional waveguide components is 1THz. © 1993 Plenum Publishing Corporation.
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