A QUASIOPTICAL W-BAND-LINE STRETCHER J. Simon * ABSTRACT A quasioptical line stretcher with W-Band waveguide ports has been developed and tested at 94 GHz. The new component for waveguide assemblies consists of two subsystems, which can be shifted relatively to each other in a tube. In each of these subsystems a dielectric lens is mounted in front of a corrugated horn. Horns and lenses have bee

A MILLIMETERWAVE HIGH-SPEED SPDT-PIN-SWITCH WITH PERFECTLY DECOUPLED PORTS Wolfgang Holpp, Stefan Rust * ABSTRACT For polarization switching, a high-speed single-pole, doublethrow PIN-switch has been developed featuring some remarkable characteristics. The switch is materialized as a window in the cross-section plane of a WR-1O waveguide. A center frequency of 94 GHz was chosen. The basic probl

MEASUREMENT OF LAYER STRUCTURES INTERFACE POSITION USING PHASE-FREQUENCY METHOD MICROWAVE B.V. Lunkin and D.V. Khablov * ABSTRACT The paper suggests an approach to the parameter analysis of objects presentable by an equivalent scheme in the form of a plane-parallel layer structure. The approach rests upon the use of the phase-frequency method aimed at processing amplitude frequency characteri

MODELING OF RADIOMETRIC SIGNALS FOR MEDICAL APPLICATIONS A. Mamouni*, Ph. Gelin**, Y. Leroy* 1. ABSTRACT The radiometric data, obtained in medical applications, have to be quantitatively interpreted. A necessary first step, with this aim in mind, is the definition of an accurate method of computation of the radiometric signals for three dimensionnal thermal structures. We define such a tool an

RF SHIELDING DUE TO BUILDING STRUCTURES LIKE BRICK WALLS, WIRE GRIDS AND METAL COATED WINDOWS. Vaessen W.T.E., Dyk J., Vorst v.d. A. * ABSTRACT RF shielding properties of low cost building- materials can be calculated from data available from the literature. To increase shielding effectiveness of buildings, wire grids imbedded in glass substrates and metal coated windows have to be placed in

OPERATION AND APPLICATION OF AN OPEN RESONATOR FOR FAST AUTOMATED MEASUREMENT THROUGHOUT THE FREQUENCY INTERVAL 8-12 GHz WIDEBAND L.J. Auchter10nie and A.L. Hume ABSTRACT A computer controlled large open resonator is operated over the band with 8-12 GHz. The design, control and performance of the resonator is described. Examples of measurements of extinction cross section are given for seve

MICROWAVE HEATING OF FUSED QUARTZ TO HIGH TEMPERATURES IN THE FABRICATION PROCESS OF OPTICAL FIBERS. Y.HASSLER and L.JOHANSEN * ABSTRACT Microwave heating in the fabrication process of high quality quartz fibers for telecommunication is described. In this process tubes and rods of ultrapure quartz with low dielectric loss factor are heated to temperatures above of a high Q tunable cavity. 2000

FAST WITH MOISTURE PROFILE MAPPING OF A DUAL-MODE RESONATOR ARRAY A WET PAPER WEB Matti Fischer*, Pertti Vainikainen*, Ebbe Nyfors* ,Mikko Kara** ABSTRACT A sensor array for measuring water mass per unit area of wet paper web has been constructed. The sensors are stripline resonators with two center conductors and two resonance modes, even and odd. By measuring the resonance frequency d

DISTRmUTED SLOW-W AVB CHEBYSHEV REFLECfOR. T. H. Wang and T. Itoh ABSTRACT A frequency-selective distributed reflector based on a new crosstie overlay slow-wave coplanar waveguide is created for possible high-Q circuit applications in monolithic microwave and millimeter-wave integrated circuits. The slow-wave reflector is desiped from a transmission-line prototype which has a prescribed stopband

MICROSTRIP ATTENUATORS AND TERMINATIONS REALIZED WITH PERIODIC ELECTROMAGNETIC STRUCTURES C. Suol i (*) ABSTRACT The analysis by means equal to constant attenuators suitable theory of electromagnetic periodic structures is applied in the of resistive microstrip attenuators. The attenuator is realized of a line whose characteristic impedance Zo is a real a prefixed normalization impedance, an