Approach to a suitable directional antenna for UHF radio positioning applications
Abstract
The phase center properties of log-periodic dipole (LPD) arrays are examined for suitability in UHF radio positioning systems and are compared with phase properties of commonly used Yagi arrays. LPD arrays offer a gain nearly comparable to that obtained from short Yagis, exhibit nearly 180-deg main lobe coverage with no front quadrant nulls, and show very small phase center movement over the entire front hemisphere.
- Publication:
-
Canadian Electrical Engineering Journal
- Pub Date:
- 1987
- Bibcode:
- 1987CEEJ...12..112T
- Keywords:
-
- Antenna Arrays;
- Directional Antennas;
- Log Periodic Antennas;
- Radio Frequencies;
- Ultrahigh Frequencies;
- Yagi Antennas;
- Electromagnetic Radiation;
- Error Analysis;
- Far Fields;
- Green'S Functions;
- Phase Velocity;
- Traveling Waves;
- Communications and Radar