Radiation from slots in artificially soft and hard cylinders

Details Radiation from slots in artificially soft and hard cylinders Radiation from slots in artificially soft and hard cylinders

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989itap...37.1628u&link_type=abstract

IEEE Transactions on Antennas and Propagation (ISSN 0018-926X), vol. 37, Dec. 1989, p. 1628-1632. Research supported by NTNF.

Computer Science

Antenna Radiation Patterns, Circular Waveguides, Electromagnetic Radiation, Slot Antennas, Surface Properties, Hardness, Radio Telescopes, Softness

Scientific paper

The radiation fields of circumferential slots in soft and hard cylinders are calculated for the case in which the slots are excited by a TE(11) circular waveguide mode. The results are compared to those for a smooth conducting cylinder, showing that the soft surface strongly reduces the intensity of the field radiated along the cylinder whereas the hard surface enhances it. The results are applicable to the design of self-supported feeds for paraboloids, and to the analysis of the line feeds of the radio telescope at the Arecibo observatory. The calculations are confirmed by measurements.

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