Tolerance theory of phased array antennas: A statistical approach
Abstract
Random errors, due to perturbations in the excitation coefficients, errors in the placement of antenna elements, mutual coupling, frequency variations in the signal, environmental and manufactring tolerances, etc., have a significant effect on the directivity, beamwidth, pointing angle, and sidelobe levels of the radiation pattern of phased-array antennas. The effect of amplitude and phase errors, and amplifier and phase shifter failures on the antenna performance was studied. The antenna considered is a linear array with amplitude distribution symmetric about the center of the antenna, but is otherwise arbitrary. The phase gradient across the array is assumed to be generated using digital phase shifters of arbitrary number of bits. The mathematical formulations and their numerical implementation are valid for a linear array of arbitrary aperture distribution and number of radiating elements at an arbitrary scan angle.
- Publication:
-
Electrical and Computer Engineering, Volumes 1 and 2 4 p (SEE N93-30215 11-31)
- Pub Date:
- 1990
- Bibcode:
- 1990ecev.confW....S
- Keywords:
-
- Antenna Arrays;
- Linear Arrays;
- Phased Arrays;
- Random Errors;
- Collimation;
- Directivity;
- Phase Shift;
- Communications and Radar