| Abstract: | A novel ellipsoidal helical antenna is proposed and studied in this letter. As a special instance, the hemispherical helical antennas are analyzed firstly, which indicates that the characteristics of a two-arm unit are better than that of a single-arm unit. Based on this, the ellipsoidal helical antenna, formed by changing the axial direction’s dimension of the two-arm hemispherical helical antenna, is analyzed by the moment method with curved basic and testing function. The effects to VSWR (Voltage Standing Wave Ratio), gain, polarization and patterns by the axial direction’s dimensions are investigated. The study results provide dependable gist to the choice of antenna format according to the practical requirements. Communication author: Xia Dongyu, born in 1978, male, Ph.D. student. The Missile Institute, Air Force Engineering University, Sanyuan 713800, China. |
