ANALYSIS OF HYBRID WAVEGUIDE STRUCTURES MICROSTRIPS AND DIELECTRIC WAVEGUIDES CONSISTING OF Reinhold Pregla, Manfred Koch, and Wilfrid Pascherl ABSTRACT The method of lines is extended to inhomogeneous dielectric layers by means of an additonal transformation and special consideration of the discretized dielectric constant. The computed dispersion diagrams for dielectric waveguides agree v

A MODE-MATCHING METHOD FOR ANALYSIS OF MICROSTRIP RADIAL STUBS Gao Bao-xin, Chen Zhao-qing* ABSTRACT A mode-matching method using the microstrip planar waveguide model analysis of microstrip radial stubs is presented. Higher order modes excited in both radial stub and feeding line are taken into account, Theoretical data correspond with experiment results closely. The error of the zero tran

ANALYSIS OF ELECTRO-OPTIC MODULATORS BY THE METHOD OF LINES A.G. ABSTRACT Keen*, M.J. Wale+, M.I. Sobhy* and A.J. Holden+ The method of lines has been applied to the calculation of electric field distributions within integrated optical modulators employing coplanar electrode structures. The method is efficient and permits the accurate modelling of multi-layer structures with varying aniso

ANALYSIS OF ARBITRARILY-SHAPED COAXIAL DISCONTINUITIES. w. K. Gwarek * ABSTRACT A method of analysing a coaxial discontinuity arbitrarily shaped in two dimensions but maintaining its axial symmetry is discussed. The considered discontinuity is transformed to an equivalent planar form and then analysed by a form of finite difference time domain method. Examples of applications are shown confi

SYNTHETIC APERTURE RADIOMETRY FOR THE IMAGING OF HOT SPOTS IN TISSUE G. Schaller * ABSTRACT This paper presents preliminary results for the imaging of hot spots in tissue utilizing microwave radiometers. Correlation techniques are applied for the measurement procedure as well as for the reconstruction algorithm. Some basic imaging examples both from experimental and simulated data are given.

SUBCUTANEOUS TEMPERATURE MEASUREMENT BY MICROWAVE THERMOGRAPHY. DAVID V. LAND and VALERIE J. BROWN * Abstract Electromagnetic and thermal models have been developed to assist the interpretation of microwave thermographic data. The electromagnetic modelling is strongly dependent on the tissue dielectric properties and the thermal modelling is strongly dependent on the tissue thermal conduct

TEMPERATUREAND PERMITTIVITY MEASUREMENTS USING A CYLINDRICALMICROWAVE IMAGING SYSTEM A. Broquetas, M. Ferrando, J.M. Rius, A. Cardama, A. Elias, J. Ibanez. ABSTRACT L. Jofre, E. de los Reyes, The capabilities of a cylindrical imaging system used in remote thermal sensing and dielectric constant measurements are investigated. The paper presents simulations of absolute and differential reconstru

MICROWAVE HUMIDITY SENSOR FOR DIFFICULT ENVIRONMENTAL CONDITIONS Anssi Toropainen, ABSTRACT Pertti Vainikainen, Ebbe Nyfors The paper describes an electromagnetic humidity sensor based on a resonance perturbation technique. The sensor is capable of measuring humidity with a wide dynamic range in industrial environment and is insensitive for dust and dirt. The all-metal construction makes th



RADAR REFLECTIVITY OF MOTOR VEHICLES AT 35 GHZ A. Kessler*, R. Westphal+ ABSTRACT The radar reflectivity of moving motor vehicles is discussed as a function of polarization, aspect angle, slant range and other parameters. The experimental setup comprises a dual channel 35-GHz-CW-doppler radar with selectable transmitt polarisation, direction of motion sensing capability and a signal recordi