Development of Circuitry for Wristband Radio Transponders

A document proposes the development of several alternative types of electronic circuits for wristband transponders for the system described in "Person-Locator System Based on Wristband Radio Transponders" (NPO-19280) NASA Tech Briefs, Vol. 19, No. 12 (December 1995), page 40. To recapitulate: microscopic transponder circuits embedded in wristbands would be powered by modulated signals radiated by transceiver nodes and would respond by transmitting signals modulated with unique digital codes to identify the wearers. The document includes a brief discussion of the advantages of the current mode in the proposed application; these advantages include superior high-frequency performance and independent control of closed-loop gain and bandwidth.