Transmission line using a phase splitter for high data rate comm

Details Transmission line using a phase splitter for high data rate comm Transmission line using a phase splitter for high data rate comm

1995-03-20

1996-11-26

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 15, 378901, A61B 603

Patent

active

055793576

ABSTRACT:
A computerized tomography (CT) system includes a stationary frame, an annular rotating frame and apparatus that includes a phase splitter having an input port coupled to receive a modulated carrier having a relatively wide bandwidth. The phase splitter has first and second output ports for supplying, respectively, first and second modulated carrier constituents having a uniform phase angle differential, such as 180.degree., between one another while maintaining a uniform amplitude over the bandwidth for the modulated carrier. A transmission line is attached to the rotating frame and is positioned around the annular rotating frame. The transmission line comprises one or more individual segments having first and second conductors respectively coupled to the output ports of the phase splitter to receive the first and second modulated carrier constituents from the phase splitter. A coupler is attached to the stationary frame and is positioned sufficiently near the transmission line for establishing radio coupling therebetween to receive the first and second modulated carrier constituents being applied to any of the individual segments.

REFERENCES:
patent: 5010254 (1991-04-01), Moore
patent: 5140696 (1992-08-01), Fox
patent: 5157393 (1992-10-01), Fox et al.
patent: 5287117 (1994-02-01), Posluszny
"Broadband Transformers and Power Combining Techniques for RF", by H. Granberg, RF Engineering-Motorola, Inc., Application note 749 in RF Device Data, vol. 2, pp. 7-98/7-106.
"Some Broad-Band Transformers", by C. Ruthroff, Proceedings of the IRE (now IEEE), Aug. 1959, pp. 1337-1342.
"A New Wide-band Balun", by W. Roberts, Proceedings of the IRE (now IEEE), Dec., 1957 pp. 1628-1631.

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