Transmission line using a power combiner for high data rate comm

Details Transmission line using a power combiner for high data rate comm Transmission line using a power combiner for high data rate comm

1995-03-20

1997-02-04

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 4, 378 19, H05G 160

Patent

active

056006977

ABSTRACT:
A computerized tomography (CT) system includes a stationary frame, an annular rotating frame and apparatus that includes a phase splitter for supplying first and second modulated carrier constituents being 180.degree. out-of-phase 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 individual segments having first and second conductors respectively coupled to the he phase splitter to receive the first and second modulated carrier constituents. 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 individual segment. The apparatus further includes a power combiner having first and second input ports for receiving the first and second modulated carrier constituents supplied by the coupler. The power combiner is designed for combining the 180.degree. out-of-phase first and second modulated carriers to form a combined modulated carrier supplied through an output port of the power combiner. The power combiner preferably includes matching resistors for cancelling any in-phase input signals which can be received through the first and second input ports of the power combiner due to externally-generated electromagnetic interference.

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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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