Further evaluation of the constrained least squares electromagnetic compensation method
Abstract
Technologies exist for construction of antennas with adaptive surfaces that can compensate for many of the larger distortions caused by thermal and gravitational forces. However, as the frequency and size of reflectors increase, the subtle surface errors become significant and degrade the overall electromagnetic performance. Electromagnetic (EM) compensation through an adaptive feed array offers means for mitigation of surface distortion effects. Implementation of EM compensation is investigated with the measured surface errors of the NASA 15 meter hoop/column reflector antenna. Computer simulations are presented for: (1) a hybrid EM compensation technique, and (2) evaluating the performance of a given EM compensation method when implemented with discretized weights.
- Publication:
-
In Old Dominion Univ
- Pub Date:
- September 1991
- Bibcode:
- 1991asee.nasa..206S
- Keywords:
-
- Antenna Arrays;
- Antenna Feeds;
- Computerized Simulation;
- Hoop Column Antennas;
- Least Squares Method;
- Reflector Antennas;
- Surface Distortion;
- Algorithms;
- Antenna Design;
- Antenna Radiation Patterns;
- Error Analysis;
- Gravitational Effects;
- Reflectors;
- Temperature Effects;
- Communications and Radar