REMOTE SENSING OF TERRAIN WITH A MICROWAVE SCATTEROMETER AVINGAN H ADJUSTABLE COMPLEX POLARISATION RESPONSE S.H.W. Simpson and B. Chambers ABSTRACT. A remote sensing technique, based upon the measurement of three complex reflection coefficients, is discussed and shown to facilitate the characterisation of a scattering surface as a function of the incident polarisation. An experimental microwave s

AN FMCW RADAR FOR ACCURATE LEVEL MEASUREMENTS Olle Edvardsson ABSTRACT The system is intended for tank level measurements and is based on a single linear sweep. By the use of a coaxial cable as a reference and a special calculating process a good accuracy and noise immunity is obtained. The accuracy is typical 0,05 % or 5 mm over a 0-60 m range. One problem with the application is the discrimin

MICROWA.VE DUGING (.~.. ili) Chlang Chlng ShaD* A.bstract Thls paper dlscrlbes the result of investigation on the of microwave imaging, whlch has been made by author since 1974. In thls paper a method of microwave imaging and principle designing models of microwave imaging tubes are suggested, whlch are based on the preceding principle of microwave imaging. In this paper possibility to improve s

MICROWAVE INSTRUMENT FOR ACCURATE MOISTURE MEASUREMENT OF TIMBER M. Tiuri, S. Heikkila ABSTRACT In this report a new instrument developed for moisture measurement of timber is described. In order to determine the dependence of the dielectric properties of moisture many measurements of the properties of timber were performed at 10 GHz. The results showed that the attenuation through timber

ANALYSIS OF SIX-PORTMEASUREMENTRESOLUTIONBY CONFORMALMAPPING Ross A. Speciale* ABSTRACT Microwave measurement systems based on the six-port principle fully reconstruct complex wave-vector ratios from sets of redundant magnitude-only readings. This leads to determining the representative points in the complex plane of the vector-ratios as intersections of three or more circles. A simple conformal

COMPUTER-AIDED SIMULTANEOUS DETERMINATION OF NOISE AND GAIN PARAMETERS OF MICROWAVETRANSISTORS Mario Sannino ABSTRACT A new method for the determination of noise and gain parameters of micro~ wave linear two-ports (transistors) is presented. The method allows the simultaneous determination of the two parameter sets through a proper computer-aided procedure which processes the experimental data ob

ON THE THEORY OF PRINTED WIRE ANTENNAS Inam E. Rana and N.G. Alexopoulos Abstract In this paper, the theory of wire antennas printed on grounded dielectric substrates is presented. Pocklington's integral equation is solved by Moment Methods to obtain the current distribution of printed wire dipoles, including printed dipoles in array configurations. Essential to the analysis is the correct

NEAR-FIELD *E.B. Ojeba ANALYSIS BY THE VECTOR WAVE EXPANSION TECHNIQUE AND THE FFT. ABSTRACT The dyadic Green's function expanded in the vector waves (cylindrical or spherical) is used to determine, from source function, the coefficient of expansion of the source fields. The reconstructed field over the surface of any cylinder or sphere surrounding the source is reduced into a two dimensional Fo

STATISTICAL PREDICTIONS DURING RAIN FOR DUAL-POLARIZATION SYSTEMS J.D. Kanellopoulos* and R.H. Clarke+ ABSTRACT A theoretical formula is derived for the joint statistics of cross-polarization discrimination (XPD) and rain attenuation for a microwave link, assuming log-normal and normal forms for the rain attenuation and XPD distribution respectively. This formula is used to predict the di