Design and Analysis of a Wideband Skeletal Spherical Dipole Antenna

A skeletal spherical dipole antenna with similar radiation characteristics to Hertzian dipole is proposed in this paper. The antenna consists of a skeletal conical feed structure, a skeletal spherical dome loaded, and four metal arms connecting the two sides of the antenna. Even though with the size comparable to the operating wavelength at 1GHz, the antenna has the similar current distribution and radiation pattern to those of the Hertzian dipole. Besides, by employing the conical feed structure, the impedance bandwidth can reach to 52.15%. This antenna can be used in the research of the interaction between plasma and electromagnetic field.