Journal ArticleDOI
Radar Search Antennas and RFI
TLDR
The susceptibility of radar search antennas to radio-frequency interference (RFI) is determined to a great extent by the minor lobe structure as mentioned in this paper, and the use of detailed, threedimensional patterns to predict RFI is not practical because the fine structure of the antenna pattern changes with frequency, range in the Fresnel zone, and site effects.Abstract:
The susceptibility of radar search antennas to radio-frequency interference (RFI) is determined to a great extent by the minor lobe structure. The use of detailed, three-dimensional patterns to predict RFI is not practical because the fine structure of the antenna pattern changes with frequency, range in the Fresnel zone, and site effects. Statistical gain studies have shown that the characteristics of individual antennas and the mutual gain characteristics of two Interfering antennas can be described with Gaussian curves. The statistical description Is Independent of in-band frequency variations and range changes (including Fresnel zone), but site effects cause small changes in the median gain.read more
Citations
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Journal ArticleDOI
Measurement of the complete far-field pattern of large antennas by radio-star sources
TL;DR: In this article, a correlation technique for measuring the complete far-field patterns of large-aperture antennas is described and evaluated analytically, using radio-star sources and employing an auxiliary antenna for providing a reference signal for crosscorrelation with the test-antenna signal.
Journal ArticleDOI
On the statistics of analytic antenna patterns
TL;DR: The approximate log normal distribution of normalized power antenna patterns within the \pm1 rad near-in region is presented for several families of illumination functions as an aid to system designers concerned with interacting radar type systems.
Journal ArticleDOI
Hemispherical power gain pattern measurements at 7.5 GHz
L. Haidle,R. Fitzgerrell +1 more
TL;DR: In this article, the complete hemispherical power gain radiation pattern of a 2.44m diameter paraboloidal reflector antenna mounted atop a mobile small earth terminal operating at 7.5 GHz was measured with the earth terminal centered on a heavy-duty turntable flush with test range ground.
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