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Coplanar Waveguide Feed to the Hemispherical DRA
Author(s) -
Shailendra Singh,
Manish Kumar,
Subhash Kumar,
Mamta Kumari
Publication year - 2011
Publication title -
material science research india
Language(s) - English
Resource type - Journals
eISSN - 2394-0565
pISSN - 0973-3469
DOI - 10.13005/msri/080117
Subject(s) - coplanar waveguide , capacitive sensing , antenna (radio) , optics , loop (graph theory) , physics , coupling (piping) , slot antenna , materials science , radiation , optoelectronics , electrical engineering , topology (electrical circuits) , acoustics , engineering , radiation pattern , microwave , mathematics , quantum mechanics , combinatorics , metallurgy
In this communication, several coplanar waveguide 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.

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