A 868 MHz compact antenna with no impact of the material support
Résumé
An ISM band sectorial compact antenna working at 868 MHz is presented in this paper. The antenna is designed to have very low perturbations in terms of radiation pattern, bandwidth and input impedance when mounted on different environments at the rear (i.e. wood, plastic or metal support). Furthermore, the PIFA topology of the antenna allows an easy matching either to a 50 Ohm input impedance for IoT/LoRA applications or to a complex impedance value for RFID applications with the help of a simple matching circuit.