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Design of a super directive four-element compact antenna array using spherical wave expansion

Abstract : In this paper, a super directive four-element compact parasitic antenna array has been designed and optimized using an ad hoc procedure based on the Harrington maximum directivity definition and spherical wave expansion. The complete design procedure (i.e. calculation of the optimum excitation coefficients and equivalent impedance loads associated to each parasitic element) is presented and validated through full-wave electromagnetic simulations. The proposed array has been designed at 868 MHz; its electrical size is 0.45$\lambda_0$ × 0.36$\lambda_0$ (diameter of minimum sphere circumscribing the antenna equal to 0.57$\lambda_0$). A prototype has been built and tested to demonstrate the effectiveness of this design. A maximum directivity of 11.7 dBi has been measured at 871 MHz in satisfactory agreement with theoretical results and electromagnetic simulations.
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Contributor : Antonio Clemente Connect in order to contact the contributor
Submitted on : Monday, April 11, 2022 - 2:09:39 PM
Last modification on : Wednesday, April 13, 2022 - 3:25:57 AM
Long-term archiving on: : Tuesday, July 12, 2022 - 6:34:51 PM


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  • HAL Id : cea-03637151, version 1



Antonio Clemente, Mélusine Pigeon, Lionel Rudant, Christophe Delaveaud. Design of a super directive four-element compact antenna array using spherical wave expansion. IEEE Transactions on Antennas and Propagation, Institute of Electrical and Electronics Engineers, In press, 63 (11), pp.4715-4722. ⟨cea-03637151⟩



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