Open AccessLoop antenna over a conducting cone with a spherical cap
Author(s) -
Halder Prasanta,
Ghosh Bratin,
Haque S.K. Moinul,
Sarabandi Kamal
Publication year - 2019
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2019.0273
Subject(s) - loop (graph theory) , loop antenna , antenna (radio) , physics , radius , attenuation , acoustics , optics , impedance matching , electrical impedance , radiation pattern , engineering , mathematics , computer science , telecommunications , antenna factor , computer security , combinatorics , quantum mechanics
A composite antenna structure consisting of a conducting cone loaded with a spherical cap is designed and analysed, considering all eigenmodes in the antenna structure. The configuration is used to enhance the impedance match to a loop antenna located above the cone tip. Matching characteristics to the loop are examined over a wide range of loop radius and loop location. It is found that the matching to the loop can be significantly enhanced over a wide range of parameter values, yielding a greater flexibility in design than the loop‐around‐the‐cone structure presented earlier with the conducting cone body inside the loop. The structure also enables placement of the loop at a greater height than the loop‐around‐the‐cone configuration, potentially improving the efficiency of signal transmission/reception or reducing scattering from the vehicular body. The mutual coupling effect of a parasitic loop placed adjacent to the primary loop is also analysed. The radiation characteristics are also evaluated.