Title :
Analysis of axial-mode helix without a ground plane
Author :
Zainud-Deen, S.H.
Author_Institution :
Riyadh Coll. of Telecommun., Saudi Arabia
Abstract :
The version of helical antenna in which the ground plane is replaced by an adjacent loop and two parasitic loops (HAWGP) is investigated. The dimensions of the structure are optimized to give maximum front to back ratio in the field pattern. The numerical results are compared with that of the balanced helical (BH) antenna. Using the moment method, the current distribution along the antenna is determined. The radiation characteristics are calculated on the basis of the obtained current distribution. Also, the frequency response of the input impedance, axial ratio, and power gain are investigated
Keywords :
antenna radiation patterns; current distribution; frequency response; helical antennas; method of moments; adjacent loop; axial ratio; axial-mode helix; balanced helical antenna; current distribution; field pattern; frequency response; helical antenna; input impedance; maximum front to back ratio; moment method; numerical results; parasitic loops; power gain; radiation characteristics; Antenna radiation patterns; Coaxial components; Conductors; Connectors; Current distribution; Degradation; Fires; Helical antennas; Horn antennas; Wire;
Conference_Titel :
Radio Science Conference, 1998. NRSC '98. Proceedings of the Fifteenth National
Conference_Location :
Cairo
Print_ISBN :
0-7803-5121-5
DOI :
10.1109/NRSC.1998.711450
