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Uniplanar circularly polarized slot‐ring antenna architectures
Author(s) -
Fries Matthias K.,
Vahldieck Rüdiger
Publication year - 2002
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/2001rs002569
Subject(s) - bandwidth (computing) , microstrip antenna , axial ratio , coaxial , patch antenna , optics , electrical length , microstrip , electrical impedance , circular polarization , coplanar waveguide , materials science , optoelectronics , physics , coaxial antenna , antenna (radio) , electrical engineering , computer science , telecommunications , engineering , microwave
This paper presents a novel printed uniplanar antenna architecture for circular polarization. The structure consists of a single‐fed slot‐ring antenna with asymmetrically placed perturbations. The influence of different kinds of perturbations and substrates on the size of the antenna, its impedance bandwidth, and its axial ratio bandwidth is investigated. Various feed circuits based on coplanar waveguides (CPWs), coaxial line, and microstrip are investigated as well. Low‐cost applications such as tagging antennas at 2.45 GHz are tested in combination with a coaxial line and CPW feed circuit. It was found that antennas achieving an impedance bandwidth over 60% and an axial ratio bandwidth up to 15% can be realized without the need of airbridges and rf‐substrates.