ELECTROMAGNETIC FIELD DETECTOR FOR BIOLOGICAL PROTECTION

E.Surducan, V.Surducan

 National Institute for research and development of Isotopic and Molecular Technologies,  
75-103 Donath Street, POB 700, Cluj Napoca, email: vasile@l30.itim-cj.ro

	In the last 50th years the environmental electromagnetic pollution has been increased 1010 times and the process continues because of the many market wireless applications. The human health negative effect due to the electromagnetic irradiation (phone cells, local radio stations, microwave owens, wireless portable handset) is not negligible. 
	In this paper we present an electromagnetic field detector for biological protection purpose. This detector was designed to monitorise all the electromagnetic events in the range of frequencies of 0.1 – 3 GHz for a selected time period (1/2 to 8 h). 

4

12

Microcontroller system

PC

7

Modulator
LF     
 8

Amplifier
LF           
9

3-9V
DC          11

The application is designated to the microwave power treatment users with the aim of personal protection to the microwave exposure. What is specific to this design is the possibilities to measure the modulated and the continuous waves as well (fig.1) and to log the events-time histogram.

Fig.1 Schematic view of the microwave detector for biological protection

(1-PIN chopper; 2-diode detector; 3- adapting stubs; 4- IN large band amplifier; 5- short; 6- microstrip circuit; 7- impedance adapter; 8- low level frequency modulator; 9- amplifier; 10- microcontroller system; 11- power supply; 12- large band antenna)