Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1984-01-31
1985-11-12
Blum, Theodore M.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343703, H01Q 300
Patent
active
045531455
ABSTRACT:
A method of forming the far-field beam pattern of an antenna at short ranges is disclosed. More specifically, the antenna beam pattern is rotated through a rotational angle about the line-of-sight of a source of radar signalling located at a near-field range away from the antenna. Measurements of the field of the antenna are taken at predetermined angular increments during the rotation thereof. The far-field beam pattern of the antenna is formed by deriving discrete values thereof for corresponding angle increments along the angular rotation. Preferably, a multiplicity of antenna field measurements are selected about each selected angular increment based on a predetermined angular spacing. The discrete beam pattern value corresponding to each selected angular increment is derived as the weighted summation of the multiplicity of antenna field measurements associated therewith. The derivation of each discrete beam pattern value may be performed substantially as the antenna field measurements are taken during the rotation of the antenna.
REFERENCES:
patent: 3879733 (1975-04-01), Hansen et al.
patent: 4201987 (1980-05-01), Tricoles et al.
patent: 4453164 (1984-06-01), Patton
patent: 4468669 (1984-08-01), Wang et al.
Blum Theodore M.
Westinghouse Electric Corp.
Zitelli W. E.
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