Feasibility study of batteryless temperature transponders using miniature microwave cavity resonators [biotelemetry]


Journal Article (Academic article)

A sensing element consisting of a miniature cavity resonator loaded with a ceramic material of high dielectric constant and large temperature coefficient of resonant frequency is connected by thin coaxial cable to a small dipole or sector antenna. Prototypes with sensors 3 mm in diameter have been fabricated and can resolve temperature differences of 0.1°C in air. Signals have been obtained from transponders implanted in anesthetized rats, but antenna orientation is a critical and limiting factor that will require further efforts before a system is capable of operating in freely roaming animals

Duke Authors

Cited Authors

  • Baumann, SB; Joines, WT; Berman, E

Published In

  • Ieee Trans. Biomed. Eng. (Usa)

Volume / Issue

  • BME-34 / 9

Start / End Page

  • 754 - 757