Transmission line with a grounding brush for high data rate comm

Details Transmission line with a grounding brush for high data rate comm Transmission line with a grounding brush for high data rate comm

1994-09-16

1996-06-25

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

378 4, 378 15, A61B 600

Patent

active

055304230

ABSTRACT:
A computerized tomography (CT) system includes a stationary frame and an annular rotating frame. The CT system further includes a transmission line made up of individual segments each having a first end and a second end and having a respective electrical length chosen so that a modulated signal simultaneously applied at each respective first end has a predetermined time-delay upon arrival at each respective second end. The individual segments are arranged so that respective first ends of any two consecutive segments are adjacent to one another and respective second ends of any two consecutive segments are adjacent to one another to avoid time-delay discontinuity in the modulated signal propagating therethrough. A shield is affixed to the transmission line for shielding the transmission line from electromagnetic radiation. A coupler is attached to the stationary frame and is positioned sufficiently near the transmission line for establishing radio coupling therebetween to receive the modulated signal being applied to the respective individual segments. The coupler and the transmission line each has a respective ground plane. A common electrical ground is established between the respective ground planes of the coupler and the transmission line as by a brush and slip ring, to reduce electromagnetic radiation leakage around the coupler.

REFERENCES:
patent: 4651338 (1987-03-01), Hahn
patent: 5140696 (1992-08-01), Fox
patent: 5157393 (1992-10-01), Fox et al.
patent: 5208581 (1993-05-01), Collins
patent: 5229871 (1993-07-01), Czarnek et al.
patent: 5287117 (1994-02-01), Posluszny

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