Jean-Michel Redoute

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With the increasing use of wireless capsule endoscopy (WCE) devices in healthcare, it is of utmost importance to analyze the electromagnetic power absorption and thermal effects caused by in-body propagation of wireless signals from these devices. This paper studies the path loss, specific absorption rate (SAR), specific absorption (SA), and temperature(More)
Biomedical implanted systems require wireless technology to transfer data and power to the implanted devices. This paper compares the performance and suitability of the ASK, FSK, PSK, OOK and PWM-ASK modulation schemes in implantable devices. Simulations illustrate that the best scenario for power and data transmission is obtained using PWM coded ASK(More)
Ultra-wide band (UWB) is gaining popularity as a physical layer technique for low power and high data rate wireless applications. Currently most wireless body area network (WBAN) platforms are based on narrowband wireless technology such as ZigBee and Bluetooth. This paper presents hardware implementation of impulse radio ultra-wide band (IR-UWB) based(More)
Two high-resolution passive delay line phase shifters in silicon-on-sapphire are compared. Both make use of digitally tuned capacitor loaded &#x03C0; sections to obtain 360 <sup>&#x00B0;</sup> phase control. The first has a nominal resolution of 9-bit and uses ten sections, yielding an insertion loss (IL) of 12.6 dB at 1.4 GHz. The second employs a center(More)
This paper presents an interface circuit for capacitive and inductive MEMS biosensors using an oscillator and a charge pump based frequency-to-voltage converter. Frequency modulation using a differential crossed coupled oscillator is adopted to sense capacitive and inductive changes. The frequency-to-voltage converter is designed with a negative feedback(More)