A WAVEGUIDE MULTIPLEXER WITH DUAL-MODE FILTERS FOR SATELLITE USE G. Pfitzenmaier x) ABSTRACT The paper treats the synthesis, optimization and practical realization of a 4 GHz waveguide multiplexer composed of a WR22Q straight waveguide manifold with one end shorted and dual TE111-mode Chebyshev bandpass filters arranged at intervals along the broad wall sides. The optimization process inc

. USE OF DIELECl'RIC MIcroPIDBES FOR ELECl'IDMAGNEl'ICFIELDS MEASUREMENT A. DEFICIS + ABSTRACI' Since 1971, our Research department is studying dielectric probes for measuring the penetration of electromagnetic waves in not-clearly defined media. These probes call for the following techoology : - dielectric light conductors a dielectric thermo-sensitive system - an electromagnetic waves abso

"A POCKET SIZED MONITOR OF DANGEROUS MICROWAVE POWER LEVELS" R.Agarwalt S.Hannaht* H. Hartnagelt J.T. Kennair*. ABSTRACT A miniature battery-operated microwave power monitor is described which operates across the threshold range of biologically dangerous power levels with approximately frequencyindependent characteristics up to about lOOGHz. CMOS circuitry causes an alarm signal to occu

MEASUREMENT OF TEMPERATURE AND MICROWAVE POWER USING LIQUID FIBER PROBES CRYSTAL/OPTIC T. C. Rozzell*, C. C. Johnson+ and O. P. Gandhi+ Abstract. Two electro-optical probes have been developed which make possible the measurement of microwave power density inside biological specimens or phantoms and the continuous monitoring of temperature of the specimen during exposure to microwaves. Several

A SYSTEM FOR QUANTITATIVE CHRONIC EXPOSURE OF A POPULATION OF RODENTS TO UHF FIELDS Arthur W. Guy, Chung-Kwang Chou, and Richard H. Lovely* ABSTRACT A system has been developed for economically exposing a large portion of rodents on a long-term basis without disturbing their normal laboratory living patterns. The use of separate cells consisting of cylindrical waveguide excited with circula



MICROWAVE ABSORPTION OF LIVING HUMAN SKIN BETWEEN 8 AND 96 GHZ Jochen Edrich* ABSTRACT For the study of mm wave thermography and hazards the absorption characteristics of living human skin are determined between 8 and 95 GHz by placing the skin against a thin dielectric film suspended across a rectangular horn and measuring its return loss. The resulting absorption curve increases from 75%

MICROWAVE BIOEFFECTS. CURRENT STATUS AND CONCEPTS Przemyslaw CZERSKf/ and Stanislaw SZMIGIELSKra/ ~ ABSTRACT. The information on microwave bioeffects /MWBE/ is derived from animal experimentation, model studies and epidemiological research on the health status of persons exposed occupationally to MW'. The analysis of MWBE requires the consideration of a chain of events: biophysical mechani



DOPPLER SPEED SENSORS FOR AUTOMOTIVE APPLICATIONS R Ross and M J Howes ABSTRACT . The problem of wheel and vehicle speed measurements in automotive antiskid systems is discussed and a microwave doppler radar solution proposed. A straightforward design approach for self-mixing Gunn device radar detectors using a new current waveform approximation is presented allowing simple observation of the ef