ATMOSPHERIC ATTENUATION STATISTICS OF 11 YEARS MEASURED BY A 12 GHZ RADIOMETER IN FINLAND S I Karhul, P Jokela1 and E T Salonen1 ABSTRACT Helsinki University of Technology and the Finnish P&T performed 12 GHz radiometer measurements on a satellite link at Kirkkonummi (in Finland) during eleven years 1979-1989. The experimental equipment, measurement theory and different calibrations, for instance

THE MEASUREMENT SECTIONS AND THEORETICAL MODELLING OF MICROWAVE OF DIFFERING TYPES OF SIMULATED HAIL AND SNOW and P.N. Fletcher SCATTERING CROSS PARTICLES L.J. Auchterlonie ABSTRACT The use of a recently established open resonator technique for measuring scattering properties of single particles is described. Application of a system of three resonators operating at frequencies around lOGHz, 35

INDOOR MULTIPAm RADIO PROPAGATION MEASUREMENTS AND CHARACTERISATION AT 60 GHz M. BENSEBTI . J. P. McGEEHAN & M. A. BEACH . ABSTRACT Indoor broadband radio propagation measurements at 60 GHz obtained from a spread spectrum channel sounder are described. The resulting statistical model, useful for planning future Wireless Communications Networks, is also presented, with an analysis of the differ

LAND COVER CONSIDERATION IN MOBILE RADIO FIELD STRENGTH PREDICTION R Rathgeber, . F M Landstorfer . ABSTRACT This article treats several aspects of field strength prediction, especially concerning the land cover influence on mobile radio links. A measure for the shadowing influence of buildings and trees in an area with mixed land cover, based on the first fresnel zone ellipsoid, is given

THREE-DIMENSIONAL TERRAIN EFFECTS ON HIGH FREQUENCY ELECTROMAGNETIC WAVE PROPAGATION N. Y. Zhu\ ABSTRACT The uniform geometrical theory of diffraction (UTD) is applied to consider threedimensional terrain effects on high frequency wave propagation. Planar convex polygons are used to approximate a given terrain and the electrical characteristics of each polygon are given through the relative dielec



BROADBAND ACTIVE MICROSTRIP ANTENNAS H. An B. Nauwelaers A. Van de Capelle. Abstract The concept of combining active devices with radiating elements for broadband active antenna design was proposed. An active microstrip transmit antenna was realized by using two sided structure and single-ended one-stage amplifier configuration. A 24 percent bandwidth, which is about 6 time that of the passive pa

CALCULATION OF THE RADIATION PATTERN OF FINITE SIZE PLANAR WAVEFRONT RESONANCE ANTENNAS H. Ostner) J. Detlefsen * ABSTRACT A method considering the finite size of the radiation aperture for general types of planar antennas) like microstrip patches or high gain printed antennas) is presented. This method takes into account the modification of the radiation pattern of a v-directed line source fed

EFFECTS OF PROBE FEED AND SOLDERING MICROSTRIP ANTENNAS J.M.Laheurte t, J.R.Mosig 0 POINT ON THICK ABSTRACf This paper deals with coaxial influence on electrically thick microstrip antennas. The analysis is based on a rigorous mathematical approach, using dyadic Green's functions for stratified media. The upper conductor and the coaxial probe are broken down into rectangles and segments, over w

OPTIMAL EDGE EXPANSION FUNCTIONS (EEF) USED IN A SUBSECTIONAL EXPANSION SCHEME TO ANALYZE MICROSTRIP ANTENNAS WITH mE METHOD OF MOMENTS G. VANDENBOSCH and A. VAN DE CAPELLE ABSTRACT The technique of solving integral equations, describing a microstrip antenna structure, with the method of moments is well known and widely used. In this paper an efficient procedure is given to determine subsection