On Small Antennas with Circular Polarization, Bandwidth Estimates and Design Considerations

Circular polarization is an essential feature for small antennas designed to connect with satellite navigation systems. Here, a Q-factor optimization problem constrained with a circular polarization radiation requirement is formulated and solved. The constrained problem is shown to be solvable as fa...

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Bibliographic Details
Published in2023 17th European Conference on Antennas and Propagation (EuCAP) pp. 1 - 5
Main Authors Jonsson, B. L. G., Ferrero, Fabien
Format Conference Proceeding
LanguageEnglish
Published European Association for Antennas and Propagation 26.03.2023
Subjects
antenna
Circular Polarization
Costs
Couplers
GNSS
Polarization
Q-factor
Q-factor bounds
Resistors
Resonant frequency
Satellite antennas
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Summary:Circular polarization is an essential feature for small antennas designed to connect with satellite navigation systems. Here, a Q-factor optimization problem constrained with a circular polarization radiation requirement is formulated and solved. The constrained problem is shown to be solvable as fast as calculating the Q-factor bound without the constraint. Two antenna models are designed to assess the bounds. One aims for bandwidth, and the other for circular polarisation. The well-known relation between the Q-factor and the available bandwidth is used to evaluate the designs. The circularly polarised antenna is close to the bound and has a wide field of view. The Q-factor bound provides insight into desirable antenna positions on the small device.
DOI:10.23919/EuCAP57121.2023.10133768