Title :
Analysis of normal mode helical antenna and scatterer
Author :
Awadalla, Kamal H. ; Zainud-Deen, S.H. ; Sharsher, H.A.
Author_Institution :
Fac. of Electron. Eng., Menoufia Univ., Egypt
Abstract :
The characteristics of the normal mode helix were investigated as an antenna and as a scatterer. The effect of different parameters on the input impedance, such as the pitch angle alpha , the circumference C, and the number of turns N, was considered. It was found that the input impedance changes little with an increasing number of turns after a starting number of about ten turns. The radiation pattern of the normal mode helix is determined in different planes. Also, the scattered field from the normal mode helix illuminated by a left-hand circular polarization is calculated, and the radar cross section is determined.<>
Keywords :
antenna radiation patterns; antenna theory; current distribution; electric impedance; electromagnetic wave scattering; radar cross-sections; current distribution; input impedance; left-hand circular polarization; normal mode helical antenna; normal mode helical scatterer; radar cross section; radiation pattern; scattered field; Broadband antennas; Current distribution; Feeds; Helical antennas; Impedance; Maxwell equations; Moment methods; Polarization; Radar scattering; Wire;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1992. AP-S. 1992 Digest. Held in Conjuction with: URSI Radio Science Meeting and Nuclear EMP Meeting., IEEE
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-0730-5
DOI :
10.1109/APS.1992.221517
