Extremely low-profile helix radiating a circularly polarized wave
Abstract
It is shown that the combination of low pitch and a small number of turns realizes a low-profile helix as a radiating element of circular polarization. A two-turn helix of 4-deg pitch angle shows a bandwidth of 12 percent for a 3 dB axial-ratio criterion. The numerical results presented have lead to new aspects of a low-pitch helix as an effective radiating element. The combination of low pitch and a small number of turns results in a low-profile helix as a radiating element of circular polarization.
- Publication:
-
IEEE Transactions on Antennas and Propagation
- Pub Date:
- June 1991
- DOI:
- 10.1109/8.86872
- Bibcode:
- 1991ITAP...39..754N
- Keywords:
-
- Antenna Radiation Patterns;
- Circular Polarization;
- Helical Antennas;
- Polarization (Waves);
- Current Distribution;
- Electrical Impedance;
- Frequency Response;
- Communications and Radar