ON THE FEASIBILITY INTERFEROMETER OF MEASURING TRANSISTOR NOISE PARAMETERS WITH AN S WITHINGTON* ABSTRACT A new method is proposed for automatically measuring the noise parameters of microwave transistors. The basic apparatus is a heterodyne interferometer and this is used to measure the self and cross spectral powers associated with the noise waves which travel away from the input and

ON THE EXPER IMENTAL STUDY OF RADAR BACKSCATTERING FROM LAND A. K. Savchenko*, S. J. Haimov*, G. P. Kulemin** ABSTRACT Microwave scattering from land is studied by using coherent X-band radar digital processing system. The main statistical characteristics of the backscatter at low grazing angles from different land surfaces are given. Experimental data such as Doppler spectra and probabilty

OPTIMIZED TECHNIQUES TO REDUCE SPECKLE IN SAR IMAGES Alessandra Forte A Abstract The Synthetic Aperture Radar (SAR) is one of the most modern spaceborne sensors used to have "images" of the Earth surface; although its characteristic to be an all-weather, day-night instrument makes it particularly attractive for geoscience investigations, the speckle which affects all SAR images reduces the

EFFECTIVE PERMITTIVITY IN MICROWAVE REMOTE SENSING PROBLEMS: MEDIA AS MIXTURES WITH SCATTERERS OF GAUSSIAN PACKETS Ari Sihvola, Ismo V. Lindelll Abstract. In this paper, the focus is on the dielectric properties of inhomogeneous media. The polarizability and dipole moment of different types of small inhomogeneous scatterers are solved. After knowing the dipole moment, the effective permittivity

Microwave Emission Model for Row-Structured Hyo J. Eom Vegetation ABSTRACT A simple emission model applicable for low scattering (scattering « absorption) anisotropic layer is developed and applied to the interpretation of measurements of microwave emission from row crops. The vegetation layer of row crops is modeled as a random slab embedded with small spheroids with major axis aligned paralle

A NEW RADAR SYSTEM FOR REMOTE SENSING Martti Hallikainen, Juha Hyyppa, Martti Toikka, Juhani Haapanen, Pekka Ahola, Jouni Pulliainen, ABSTRACT Teemu Tares, and Kari Leppanen A helicopter-borne dual-frequency FM-CW scatterometer for remote sensing is described. The scatterometer can measure the radar backscatter from a target with a range resolution of one meter. This is accomplished by performin

MILLIMETRE WAVE FILTER SYNTHESIS USING IMAGE GUIDE SHORT CIRCUIT RESONATORS Pennockt and T. Rozzit J.S. Kot*, S.R. ABSTRACT A simple analysis of a band stop filter consisting of a short circuited dielectric image guide resonator edge-coupled to a dielectric image line is presented. The analysis is compared to experiment in the 26.5 to 40 GHz band, and good agreement between theory and m

ON THE fEASIBILITY DIELECTRIC X.H. OF _MILLIMETER WAVE DIRECTIONAL FILTERS USING RESONATORS JIAO and P. GUILLON ABSTRACT This paper is concerned with the feasibility filters using high permittivity ( r=36) cylindrical filter responses at about 35 GHz are presented. of millimeter wave directional dielectric resonators. Measured 

SLOT LINE COMPONENTS FOR MILLIMETER WAVE AND SUB-MILLIMETER W AVB INTEGRATED CIRCUITS Anders Skalare, Erik Kollberg, Joakim Johansson ABSTRACT * Measurements of radiation losses from a few slot line components on high-epsilon (around 11) materials are presented, including short circuits, open circuits, and lambdaquarter filters. Also covered are losses via surface modes, and tapered slot antenn

CAD of Waveguide Band-Pass Filters for Applications Millimeterwave Radar Frontends in W. Mahler, R. Rathgeber, F. Landstorfer * ; W. Holpp ** Abstract Window-coupled rectangular waveguide band-pass filters are designed by a new method based on the mode matching technique. The method takes into account the interactions of adjacent windows by considering higher order modes during the synthesis pr