Abstract
In this letter, a novel and compact 180° circular sector microstrip antenna has been proposed. The patch surface has been designed with a proper design insight to perturb and control the orthogonal surface current paths and orthogonal field components at the truncated edges for suppression of cross-polar (XP) radiations over the whole elevation without hampering its radiation pattern and bandwidth. The proposed antenna gives consistently better performance with different (large, medium, and small) ground plane sizes in spite of massive miniaturization (of 82%) with reference to conventional circular microstrip antenna at the same frequency. The proposed antenna can also be circumscribed completely within a sphere of radius (λ/2π), i.e., wheeler limit and hence can stand well as a small antenna.
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