Title :
A Passive Method for Monitoring Non-Ionizing Radiation
Author :
Fanslow, G.E. ; Stephenson, D.T.
Abstract :
The temperature-dependent light scattering properties of cholesteric liquid crystals are used as both the sensing and indicating mechanism in a calorimetric radiation monitor. The liquid crystals are arranged on two dielectric disks; one is a plain dielectric and the other is metal coated. While both disks will respond to general changes in ambient conditions, the metallized disk will also have a temperature change due to absorbed radiation. Thus, the difference between the temperatures of the two disks, as indicated by the liquid crystals, is a measure of radiation. Experimental models are described and the results of tests at 2.45 GHz for power densities of from 1 to 15 mW/cm/sup 2/ are presented.
Keywords :
Dielectric liquids; Electromagnetic scattering; Light scattering; Liquid crystals; Metallization; Plastics; Radar scattering; Radiation monitoring; Temperature distribution; Temperature sensors;
Conference_Titel :
Microwave Symposium Digest, 1977 IEEE MTT-S International
Conference_Location :
San Diego, CA, USA
DOI :
10.1109/MWSYM.1977.1124397