Communications: radio wave antennas – Antennas – Measuring signal energy
Patent
1978-03-03
1980-05-06
Lieberman, Eli
Communications: radio wave antennas
Antennas
Measuring signal energy
455 67, G01R 2910
Patent
active
042019877
ABSTRACT:
A method for determining antenna near-fields from measurements on a spherical surface. Phase and intensity values are measured by scanning a probe antenna over a spherical surface. The method applies both to planar or conformal antennas. The spherical surface may be in the Fresnel or Fraunhofer regions. The field at the antenna is computed utilizing the complex conjugate of the measured field. As a result, the source antenna at the point at which the antenna radiating field is evaluated is inside the measurement surface. Far-field patterns can be computed from the near-fields reconstructed from the spherical hologram surface.
REFERENCES:
Bates & Napier; Proceedings I.R.E.E. Australia, vol. 32, No. 4, Apr. 1971, p. 164-166.
Test Procedure for Antennas; IEEE No. 149, Jan. 1965; pp. 8-17.
Jull, Estimation of Aerial Radiation Patterns from Limited Near-Field Measurements, IEE vol. 110, No. 3, pp. 501-506 (1963).
Bennett et al.; Microwave Holographic Metrology of Large Reflector Antennas, AP-24, No. 3, May 1976, pp. 295-303.
Rope Eugene L.
Tricoles Gus P.
Lieberman Eli
Phillips T. M.
Rubens G. J.
Sciascia R. S.
The United States of America as represented by the Secretary of
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