Wave transmission lines and networks – Long line elements and components – Waveguide elements and components
Patent
1985-08-02
1987-03-31
Gensler, Paul
Wave transmission lines and networks
Long line elements and components
Waveguide elements and components
333 21R, H01P 106
Patent
active
046546138
ABSTRACT:
A radar rotary joint usable at all frequencies, but particularly useful at millimeter wavelengths includes an inner housing, an outer housing, bearings for rotatably interconnecting the inner and outer housing, and irises for converting the mode of incoming and exiting electromagnetic energy. The inner housing has a TE.sub.11 mode circular waveguide, a TM.sub.01 mode circular waveguide and a right angle transition for converting the TE.sub.11 mode to TM.sub.01 mode and an outer surface forming a bearing support, an outer bearing housing for enclosing the bearings and bearing retainers for retaining the bearings between the outer bearing housing and the bearing supporting surface of the inner housing. The outer housing is attached to the outer bearing housing and includes a TM.sub.01 mode circular waveguide, a TE.sub.11 mode circular waveguide and a right angle transition for converting the TM.sub.01 mode to the TE.sub.11 mode. An inline junction input iris attached between a TE.sub.10 rectangular waveguide feed and TE.sub.11 circular waveguide converts the TE.sub.10 mode to the TE.sub.11 mode, and an inline junction output iris converts the TE.sub. 11 mode of the circular waveguide of the outer housing to the TE.sub.10 mode of a connecting rectangular waveguide.
REFERENCES:
patent: 2632806 (1953-03-01), Preston
patent: 2914741 (1959-11-01), Unger
patent: 3715688 (1973-02-01), Woodward
Beck, Measurement Techniques for Multimode Waveguides, Proc. of Symposium on Modern Advances in Microwave Techniques, New York, Nov. 1954.
Gensler Paul
Heiting Leo N.
Robinson Richard K.
Sharp Melvin
Texas Instruments Incorporated
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