Absolute measurements of antenna parameters by illumination method

Details Absolute measurements of antenna parameters by illumination method Absolute measurements of antenna parameters by illumination method

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985rpeee.......71p&link_type=abstract

In its USSR Report: Electronics and Electrical Engineering (JPRS-UEE-85-011) p 71-72 (SEE N86-15484 06-31) Transl. into ENGLI

Physics

Antenna Design, Cosmic Rays, Directivity, Power Gain, Radiant Flux Density, Far Fields, Radio Telescopes, Radiometers, Signal To Noise Ratios

Scientific paper

A new method for absolute calibration of antenna gain is described which uses a metal disk located in the far field of the antenna, which reflects the wideband noise signal radiated by the antennas as the calibrated transmitter. A block diagram is shown of the radiometer and the antenna feeder sections. The results of measurements of the effective area of the RTN-7 radio telescope at lambda = 95 cm agree well with data from the simultaneous calibration of the RTN-7 by the black disk method. Graphs are presented of the dependence of the signal-to-noise ratio on the magnitude of the signal illumination during matching of the feed. A diagram is shown of the directivity of the RTN-7 radio telescope in an azimuthal plane. The new method can also be used to measure the radiating power of antennas.

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