Dipole arrays with sector-shaped patterns for applications in mobile radio communications
Abstract
Base station antennas in sector-shaped small-cell service areas for the land mobile network (450 MHz) service are described. The antenna concept proposes a sector having an angular aperture of 60 deg served by an antenna array consisting of single antennas placed in front of a plane reflector plate. The synthesis of their patterns yields the desired sector-shaped pattern, the amplitude of which decreases steeply to values below -25 dB in the overlapping area between 30 and 40 deg of the horizontal angle. The only variables for obtaining the sector-shaped pattern are the number of single dipoles, their spacings, the beam direction, and the radiation pattern. The mathematical model of the single antenna corresponds to an array of single dipoles arranged as a broadside antenna in front of a reflector of infinite dimension. The pattern synthesis shows that the resulting distances between the dipoles are too small for the technical realization. The problem can only be solved by combining several dipoles to obtain a single antenna.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- December 1983
- Bibcode:
- 1983STIN...8429076H
- Keywords:
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- Antenna Design;
- Antenna Radiation Patterns;
- Dipole Antennas;
- Antenna Arrays;
- C Band;
- Mathematical Models;
- Network Synthesis;
- Product Development;
- Yagi Antennas;
- Communications and Radar