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In this paper, a 60 MHz voltage controlled oscillator based on a custom-built silicon carbide (SiC) junction field effect transistor (JFET) is proposed. This SiC VCO is capable of high temperature operation up to 450 °C. A prototype is fabricated through low temperature co-fire (LTCC) process and successfully tested from room temperature to 450 °C, at which stable circuit operation is maintained....
This paper presents an in progress development of a complete RFID measurement system for space in-vehicle sensor data transmission. The RFID measurement system utilizes the EPCglobal Gen2 protocol for the communications and allows connecting common launcher's sensors (thermocouple, resistance temperature detectors, strain gauge, and pressure sensor). An ultra low power microcontroller manages the...
This work is devoted to the feasibility study of a wireless sensing system, mainly based on passive surface acoustic wave (SAW) sensors, for remote measurement of temperature aboard space platforms. The use of passive sensors is particularly attractive since they need no battery and are robust in extreme environments, as they contain no active electronic circuits. The main objective of this study...
In this paper, we apply results from multi-user information theory to study the limits of information capacity and collision resolution for SAW RFID tags. In particular, we derive bounds on the achievable data rate per tag as a function of fundamental parameters such as tag time-bandwidth product, tag signal-to-noise ratio (SNR), and number of tags in the environment. We also discuss the implications...
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