Miniaturized Omnidirectional Circularly Polarized Antenna for IoT Applications

Verdiana Mastrosimini (1, 2) , Luca Santamaria (1) , Marco Grande (2) , Fabien Ferrero (3, 3) , Robert Staraj (1) , Leonardo Lizzi (1)

1 LEAT - Laboratoire d'Electronique, Antennes et Télécommunications
2 Polytechnic University of Bari / Politecnico di Bari
3 CREMANT - Centre de REcherche Mutualisé sur les ANTennes

In this paper, a miniaturized omnidirectional circularly polarized (OCP) antenna for Internet-of-Things (IoT) applications is presented. The CP waveform is synthesized by combining two linearly polarized antenna elements which act as electric and magnetic dipole, respectively. The vertical and the horizontally polarized elements are integrated and fed by a single port. The OCP antenna achieves a CP bandwidth covering 80 MHz from 2.4 to 2.48 GHz. The results show that the antenna can provide at 2.44 GHz an axial ratio lower than 3 dB and gain variations of less than 1.1 dB over all azimuth angles. The OCP antenna is printed on two cost-effective FR-4 PCBs and it is very low profile. Thanks to its radiation and geometric properties, the proposed antenna solution fits well in specific IoT use cases where a monopole-type radiation pattern is required.

Mots clés: circularly polarized antennas; miniaturized antennas; omnidirectional pattern; Internet-of-Things (IoT); Geometry; Dipole antennas; Azimuth; Printed circuits; Europe; Bandwidth; Antenna feeds

Domaines: Electromagnétisme

Verdiana Mastrosimini, Luca Santamaria, Marco Grande, Fabien Ferrero, Robert Staraj, et al.. Miniaturized Omnidirectional Circularly Polarized Antenna for IoT Applications. 15th European Conference on Antennas and Propagation (EUCAP 2021), Mar 2021, Dusseldorf, Germany. pp.1-4, ⟨10.23919/EuCAP51087.2021.9411046⟩. ⟨hal-03209080⟩