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This paper presents methods of phase-amplitude automatic measuring for multichannel APAA. The form of the far-field pattern (width, main-lobe position, side lobe amplitude) directly correlates with amplitude-phase distribution. Modern APAA contains a large number of channels (tens, hundreds), which makes automatic measuring of phase-amplitude characteristics relevant. Testing equipment that was developed...
For a radar image synthesis obtained from synthetic aperture radar it's necessary to use its own support function (matched filter impulse response) for each range line. Fourier transform of the support function takes near a third of all computations, in case of range migration — substantially more. At the same time, the support function for any distance may be obtained by simple stretching and compression...
Fast method of inner calibration of individual channel of active phased antenna arrays (APAA) has been introduced earlier. This method can be used for measuring complex amplitude characteristics of individual channels of both receive and transmit APAA using single measurement procedure. However, this method returns complex amplitude characteristics only at single carrier frequency; for wideband systems...
Advanced method of inner calibration of individual receive modules of active phased antenna arrays (APAA) in synthetic aperture radar (SAR) is discussed. This method allows fast and accuracy amplitude and phase characterization of every receive modules and uses pseudo-noise sequences as core of calibrating sequences system. Decorrelation method of cancelling mutual interference using simple matrix...
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