Coplanar Waveguide Feed to the Hemispherical DRA

• DOI: 10.13005/msri/080117
• Publication Date: 2018-05-18T01:30:44Z
• Authors: S. N. Singh; Manish Kumar; Subhash Kumar; Mamta Kumari
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

In this communication, several coplanar wave guide topologies to the hemispherical DR.A are presented. It is seen that the inductive and the circular-loop CPW feed configurations offer the flexibility to excite the fundamental TE111 resonant mode of the hemispherical DRA close to the source free resonant frequency, due to the presence of metallization in the coupling region. Dual-band behavior is observed with the capacitive feed due to the DRA and slot resonant modes, which are displaced with respect to the unperturbed modes due to the uninterrupted slot. The radiation characteristics of the antenna arc also explained.