A fully-printed 3D antenna with 92% quasi-isotropic and 85% CP coverage
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Date
2022-04-25
Authors
Su, Zhen
Klionovski, Kirill
Liao, Hanguang
Li, Weiwei
Shamim, Atif
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Published Version
Abstract
Internet of things (IoT) applications require orientation insensitive wireless devices to maintain stable and reliable communication. For those reasons, antennas providing a wide quasi-isotropic and circular polarization (CP) coverage are very attractive. However, achieving a wide quasi-isotropic and CP coverage simultaneously is challenging. In this work, we show that properly designed sloped dipoles on a 3D structure can maximize the CP coverage (theoretically up to 100%) even with equal-phased feed to the dipole elements. We derive the conditions and present the design graphs for the optimum slope angle for the dipole elements on a 3D hexagonal-shaped package to achieve a wide quasi-isotropic and CP coverage simultaneously. Based on the proposed theory, a practical antenna has been designed and fabricated using additive manufacturing. The measured results demonstrate a 7dB-isotropy of 92% and a CP coverage of 85%, which matches well with the predicted results from the theoretical analysis and full-wave simulations.
Description
Keywords
Circularly polarized antenna , Quasi-isotropic radiation pattern , Orientation insensitive antenna
Citation
Su, Z., Klionovski, K., Liao, H., Li, W. and Shamim, A. (2022) 'A fully-printed 3D antenna with 92% quasi-isotropic and 85% CP coverage', IEEE Transactions on Antennas and Propagation. doi: 10.1109/TAP.2022.3168688
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