We present a differential wireless passive sensor based on a miniature antenna associated with a MEMS capacitive pressure sensor.In this configuration, a change in the external pressure results in a shift of the antenna resonance frequency and, thus, a variation in the antenna Radar Cross Section walking Stick (RCS) detectable from a distance of a few meters.The MEMS and the antenna are modelled and simulated, and a co-design procedure is developed to optimize their performance.The MEMS are fabricated on a Uva Ursi 200-mm technological platform and characterized.
A specific setup was conceived to characterize the antenna sensor as a function of pressure in an anechoic chamber.