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

fYear

1992

fDate

18-25 June 1992

Firstpage

1731

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/APS.1992.221517

Filename

221517