An evaluation of the performance of the VLA circular waveguide system

Details An evaluation of the performance of the VLA circular waveguide system An evaluation of the performance of the VLA circular waveguide system

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980itmtt..28..786a&link_type=abstract

IEEE Transactions on Microwave Theory and Techniques, vol. MTT-28, July 1980, p. 786-791.

Computer Science

Performance

Helical Antennas, Millimeter Waves, Optical Waveguides, Performance Prediction, Radio Telescopes, Cost Effectiveness, Propagation Modes, Very Large Array (Vla)

Scientific paper

A helix-lined millimeter wavelength circular waveguide system has been installed at the Very Large Array (VLA) telescope, a high-sensitivity multifrequency Fourier synthesis radio telescope which provides high-resolution brightness maps of cosmic radio sources. The waveguide performance is evaluated by considering the relationship between measured attenuation per unit length as a function of frequency, total installed waveguide length, and time since installation. Consideration is also given to the effects of TE(01)-mode reflections and coupling from the TE(01) mode to higher-order circularly symmetric modes on the waveguide transmission response.

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