The overall procedure toward the implementation of a compact tunable athermal filter mounted on a piezoelectric actuator and based on a π-shift chirped fiber Bragg grating is presented. This package ensures an active tunablility over 2 nm with a cross thermal induced Bragg wavelength shift below 100 pm over a temperature range from −20°C to +80°C. The proposed filter makes use of the overall response of a π-shift chirped fiber Bragg grating and a bulk broadband microfilter that enables a sharp optical transmission spectrum response having a FWHM below 20 pm within a 2 nm region and 20 dB rejection band to be obtained.
This paper presents a wireless sensor network for smart electronic shirts. This allows the monitoring of individual
biomedical data, such the cardio-respiratory function. The solution chosen to transmit the body's measured signals for
further processing was the use of a wireless link, working at the 2.4 GHz ISM band. A radio-frequency transceiver chip was
designed in a UMC RF 0.18 μm CMOS process. The power supply of the transceiver is 1.8 V. Simulations show a power
consumption of 12.9 mW. Innovative topics concerning efficient power management was taken into account during the
design of the transceiver.