Accession Number : AD0259660

Title :   SYNTHETIC APERTURE ANTENNA INVESTIGATION

Corporate Author : GENERAL ELECTRIC CO SYRACUSE N Y

Personal Author(s) : ADAMS,W.B. ; MAYO,B.R.

Report Date : APR 1961

Pagination or Media Count : 1

Abstract : A general mathematical model of a linear radar system is developed. In this model the antenna is treated as a two-port filter whose transfer function contains the spatial angles as parameters. It is concluded that the transmit transfer function of an antenna differs from its receive transfer function. The relationships connecting the two were developed. The mathematical model allows the calculation of the radar system performance for arbitrary transmit waveforms and arbitrary antenna transfer functions. The timedomain and frequency-domain impulse responses of the uniformly-illuminated continuous aperture, the cosine-tapered continuous aperture, the electric dipole, the magnetic dipole, and the three-dimensional array of elements are developed. The spatial configuration of an array which has the same one-way transfer function as t e two-way transfer function of a given array is shown to be given by the convolution of the spatial configuration of the given array with itself. The mathematical model is used to calculate the pattern of a uniform aperture excited by a simple pulse which is short compared to array length. The pattern is shown to be normal in the region near boresight but radically different from the normal pattern for angles far off boresight. The pattern for a phase steered array excited by a simple pulse which is short compared to array length is also calculated. (Author)

Descriptors :   *RADAR ANTENNAS, *RADAR EQUIPMENT, ANTENNAS, BROADBAND, CODING, CORRELATION TECHNIQUES, DATA PROCESSING, DETECTION, DOPPLER RADAR, FUNCTIONS(MATHEMATICS), LINEAR SYSTEMS, MATHEMATICAL ANALYSIS, NONLINEAR SYSTEMS, RADAR SIGNALS, RADAR TARGETS, SYNTHESIS, WAVEFORM GENERATORS

Distribution Statement : APPROVED FOR PUBLIC RELEASE