ABSTRACT
This chapter discusses certain chemical microsensors, electronic noses, and various radio ICs and their power sources and antennas used to wirelessly communicate data from remote chemical microsensors. All solid-state chemical microsensors can be put into two major categories: The first category consists of devices that sense chemical analytes whose presence modulates the transport of electric charges in the device. The second category devices are based on a number of diverse technologies, including surface acoustic wave oscillators, potentiometric gas sensors, and pyroelectric enthalpimetric sensors. An Electronic nose is an electronic chemosensor system designed to detect and quantify analyte vapors, generally in air, often at extremely low concentrations. Wireless patient monitoring is a rapidly growing wireless data transmission (WDX) technology applied to the monitoring of the vital signs of patients in all hospital departments, as well as ambulatory patients undergoing physical therapy and exercise. WDX is required for carried and implanted micro-electro-mechanical sensors on moving animals and humans, vehicle and cargo.
