Patent ID: 9041610
Filing Date: 2015-05-26
Classification: G01R

Abstract:
1. A dynamic antenna pattern measurement method, said dynamic antenna pattern measurement method comprising recovering full vector angular and temporal information of an output commutation sequence's radiation by: placing a dynamic antenna under test (AUT) in an antenna measurement facility, said antenna measurement facility having a positioner; placing a reference antenna at a fixed angle with respect to said AUT; programming said AUT with a commutation (beamsteering) sequence to be measured; programming said positioner with a predetermined solid angle scan; transmitting said commutation sequence from said AUT with a probe antenna in an initial angular position relative to said AUT; recording the full time-domain waveform received by said probe antenna; recording the full time-domain waveform received by said reference antenna; moving said positioner to a next angular position in said solid angle scan; re-playing said AUT's commutation sequence; recording the full time-domain waveform received by said probe antenna; recording the full time-domain waveform received by said reference antenna; recording a plurality of full time-domain waveforms received by said probe antenna and a plurality of full time-domain waveforms received by said reference antenna by iterating through said moving said positioner to a next angular position in said predetermined solid angle scan, re-playing said AUT's commutation sequence, and recording the full time-domain waveform received by said probe antenna and the full-time domain waveform received by said reference antenna, steps until the entire predetermined solid angle scan is completed; designating a waveform of said plurality of full time domain waveforms received by said reference antenna to be a center reference antenna waveform; generating a time delay value for each angular position in said solid angle scan, wherein said time delay value for a particular angular position in said solid angle scan other than an angular position at which said center reference antenna waveform was recorded is calculated by cross correlating the full-time domain waveform received by said reference antenna at the particular angular position with said center reference antenna waveform, wherein said time delay value for the angular position at which said center reference antenna waveform was recorded is set equal to zero; and generating a time-aligned probe antenna full-time domain waveform for each angular position in said solid angle scan by shifting the full-time domain waveform recorded by the probe antenna at the angular position an amount equal to the time delay value generated for the angular position at which the time-aligned full-time domain waveform recorded by the probe antenna was measured.