Eco-friendly based substrates for telemetry antennas in UHF- and S-bands
Résumé
A circularly polarized (CP) patch antenna and a CP 2x2 antenna array on thick (0.075 lambda(450MHz) and 0.11 lambda(2300MHz) respectively) polypropylene substrates are introduced; the numerical design and the manufacturing concept are presented. Two prototypes are characterized and validated for different applications. The first prototype is used for communication and telemetry around 450 MHz between the autopilot of a UAV and the ground station. The second antenna is used both for flight tracking and telemetry at around 2300 MHz.