Short helical antenna array fed from a waveguide
Abstract
An array consisting of short helical antennas is fed from a single rectangular waveguide. Stubs are introduced near the array elements in order to make a matching condition between the array elements and the waveguide. On the basis of a transmission line theory, a coupling phase and a coupling factor are determined. The mechanical rotation is applied to each array element so that in-phase condition at the aperture may be formed. Excellent agreement between the calculated and experimental results is demonstrated in the arrays of five, seven, and nine helical antennas.
- Publication:
-
IEEE Transactions on Antennas and Propagation
- Pub Date:
- August 1984
- DOI:
- 10.1109/TAP.1984.1143417
- Bibcode:
- 1984ITAP...32..836N
- Keywords:
-
- Antenna Arrays;
- Antenna Design;
- Antenna Feeds;
- Antenna Radiation Patterns;
- Helical Antennas;
- Waveguides;
- Electrical Impedance;
- Equivalent Circuits;
- Transmission Lines;
- Wave Reflection;
- Communications and Radar