This work presents the application of a 5.8 GHz Self-Injection Locked Oscillator (SILO) for vital signs detection, in particular human breath sensing, without the need of anchor nodes nor remote linked receivers. Specifically, the prototype used for this scope exploits the two cross-polarized fields of an aperture-coupled fed patch antenna that represent the typical input and output ports of a SILO structure. The overall working principle of the system consists in the reception of the frequency-modulated signal coming from the user’s chest moving under the effect of breathing. Moreover, this device is fully wearable: i.e., it can be worn by the user under test in the chest position inside a plastic case assuring a suitable distance from the body. Finally, in addition to the respiratory rate, a tentative estimate of the lung capacity is also feasible, with the distinction between normal and deep breath
Paolini G., Feliciani M., Masotti D., Costanzo A. (2019). Experimental Study of a Self-Oscillating Antenna at 5.8 GHz for Breath Monitoring. New York (NJ) : Institute of Electrical and Electronics Engineers Inc. [10.1109/APWC.2019.8870412].
Experimental Study of a Self-Oscillating Antenna at 5.8 GHz for Breath Monitoring
Paolini G.;Feliciani M.;Masotti D.;Costanzo A.
2019
Abstract
This work presents the application of a 5.8 GHz Self-Injection Locked Oscillator (SILO) for vital signs detection, in particular human breath sensing, without the need of anchor nodes nor remote linked receivers. Specifically, the prototype used for this scope exploits the two cross-polarized fields of an aperture-coupled fed patch antenna that represent the typical input and output ports of a SILO structure. The overall working principle of the system consists in the reception of the frequency-modulated signal coming from the user’s chest moving under the effect of breathing. Moreover, this device is fully wearable: i.e., it can be worn by the user under test in the chest position inside a plastic case assuring a suitable distance from the body. Finally, in addition to the respiratory rate, a tentative estimate of the lung capacity is also feasible, with the distinction between normal and deep breathI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
