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- W2148179899 abstract "The very-large-array (VLA) radio telescope utilizes a low-loss TE/sub 01/ circular waveguide transmission system. During the design of this system a coupler was developed which couples directly from a standard millimeter rectangular waveguide to the TE/sub 01/mode in highly over-moded circular waveguide. In contrast to previous couplers which used periodically spaced groups of coupling holes, this design wraps the rectangular waveguide in a helix around the circular waveguide to give a continuous array of coupling apertures for maximum coupling and a compact mechanical configuration. The helix angle is chosen to match the phase velocities of the rectangular and circular waveguide modes at a given frequency. In particular, couplers have been designed and fabricated which couple from WR-28 (26.540-GHz) and WR-22 (33-50-GHz) rectangular waveguides to the TE/sub 01/ mode in 20- and 60-mm-diam circular waveguide." @default.
- W2148179899 created "2016-06-24" @default.
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- W2148179899 date "1976-11-01" @default.
- W2148179899 modified "2023-09-23" @default.
- W2148179899 title "Helical Coupler from Rectangular-to-Circular Waveguide" @default.
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- W2148179899 doi "https://doi.org/10.1109/tmtt.1976.1128972" @default.
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