Abstract
A novel technique for the design and implementation of an adaptive superdirective antenna array is presented. With this technique, the characteristics of the adaptive superdirective array can be held almost constant over a wide scan-angle range. These characteristics were made possible by means of both amplitude and phase variations, based on predetermined optimized array polynomials. The commonly used adaptive algorithms were compared and the LMS (least mean square) algorithm was selected for the simulation of the adaptive array system. The system performance was determined for different scan angles. The mean square error between the desired patterns and the simulated patterns after being multiplied by the adaptive weights is shown for a scan-angle of 92°. Although the adaptive system performance is acceptable, it was found that the error within the main beam can be further reduced by increasing the adaption constant to 0.62525 in this range only. By allowing the adaptive gain to switch values, the mean square error will be further reduced in the entire operating range.
| Original language | English |
|---|---|
| Pages (from-to) | 1700-1703 |
| Number of pages | 4 |
| Journal | IEEE Antennas and Propagation Society, AP-S International Symposium (Digest) |
| Volume | 4 |
| DOIs | |
| State | Published - 1990 |
ASJC Scopus subject areas
- Electrical and Electronic Engineering