Physics
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990itap...38.1848q&link_type=abstract
IEEE Transactions on Antennas and Propagation (ISSN 0018-926X), vol. 38, Nov. 1990, p. 1848-1851.
Physics
Antenna Design, Antenna Radiation Patterns, Brightness Temperature, Radio Antennas, Fourier Analysis, Plane Waves, Transfer Functions
Scientific paper
A multiplicative (cross-correlation) receiving antenna system with a linear aperture can have a power pattern P0 (u) (the so-called principal-solution power pattern) whose spatial frequency transfer function (SFTF) is uniform over the entire spatial frequency (SF) bandwidth. A modified principal solution system which retains the uniform SFTF except for smooth transitions at the ends of the SF passband is described. The transitions are due to a change in the original pattern P0(u), which suffers from high sidelobes, to a Taylor (1955) synthesis pattern PT(u) which involves a slowly varying envelope pattern. All of the slowly varying envelope sidelobes of PT(u) are set at the same appropriate low level, e.g., -30 dB. The aperture weighting distributions are free of singularities, unlike those for P0(u), and can be sampled to provide the current weightings for a linear multiplicative array.
MacPhie Robert H.
Qian Jizeng
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