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Article Dans Une Revue International Journal of Microwave and Wireless Technologies Année : 2023

Cylindrical conformation and miniaturization of cavity-backed magnetoelectric antenna with an outer Γ-shaped probe

Résumé

In this article, the cylindrical conformation of a linearly polarized cavity-backed magnetoelectric (ME) antenna is studied. Starting from a planar ME antenna presenting a wide bandwidth due to a specific design of its feeding probe, the impact of conformation is shown; the coupling between the ME dipole and the cavity walls is demonstrated to be the key element to keep a wideband behavior. Conformal antennas offering the same impedance bandwidth as the planar antenna are presented operating at Global Navigation Satellite System frequencies (1.164–1.61 GHz). As a result of the conformation, the antenna size has to be reduced to maintain the coupling and a wideband behavior. A prototype conformed to a 44-mm radius cylinder was built using low-cost additive manufacturing. External dimensions of 62 × 62 × 35 mm3 (0.285 × 0.285 × 0.16λ03, where λ0 is the wavelength at 1.38 GHz) were obtained, showing a ground plane area reduction of 46% compared to the planar antenna with the same materials. The conformal antenna also exhibits very steady radiation properties with a gain of around 4.5 dBi and a very similar and stable 3 dB beamwidth around 113° in E- and H-planes. A relatively good agreement is found between measurements and simulation.
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Dates et versions

hal-04357284 , version 1 (21-12-2023)

Identifiants

Citer

Alexandre Causse, Loic Bernard, Sylvain Collardey, Ala Sharaiha. Cylindrical conformation and miniaturization of cavity-backed magnetoelectric antenna with an outer Γ-shaped probe. International Journal of Microwave and Wireless Technologies, 2023, International Journal of Microwave and Wireless Technologies, pp.1-9. ⟨10.1017/s1759078723001265⟩. ⟨hal-04357284⟩
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