HIGHER-ORDER MODES ON SLOT LINES Karel Mejsnar ABSTRACT The dispersion equation of the slot line is modified to describe higher order modes. The rapid convergence without extraordinary solutions is obtained. The examples of the electric field distribution in the slot and the dispersion plot for several first higher order modes are included. The presence of simple poles in dispersion equation int

CALCULATION OF THE TRANSMISSION PROPERTIES OF INHOMOGENEOUS FIN LINES Adalbert Beyer and Ingo Wolff ABSTRACT The transmission in inhomogeneous fin lines is investigated theoretically and experimentally for varying slot width, taking into account finite metallization thickness and the effect of the longitudinal slit. The inhomogeneous unilateral fin lines are placed across the center of the

TEll REFLECTION APPLICATION OF OPEN-ENDED CIRCULAR WAVEGUIDES OF MATERIALS TO NONDESTRUCTIVE MEASUREMENT J.-C. BESSON, S. MAMANE, F.E. GARDIOL ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE Chemin de Bellerive 16, CH-1007 Lausanne. ABSTRACT: The measurement of dielectric properties of a material based on the reflection of an open-ended waveguide is a simple and nondestructive technique, which doe

A NEW BROADBAND HIGH DIRECTIVITY 3dB-HYBRID AND POWER DIVIDER Lennart Nystrom ABSTRACT This paper shows an analytic way of synthesizing the 2-way Wilkinson power divider without any CAD optimization. The bandwidth in the new design is increased by increasing the number of quarter-wave transformer in the even and odd mode equivalent circuits. Only one isolating resistance is used independent

THE TIME AND FREQUENCY DOMAIN ANALYSIS AND SYNTHESIS OF DISTRIBUTED AND LUMPED/DISTRIBUTED NETWORKS M. I. Sobhy and E. A. Hosny* Abstract: Using state-space techniques, a method has been developed for the computer-aided analysis and synthesis of networks containing both lumped and distributed elements. The method is very powerful as it can deal with any network topology and the same ba

AN APPROACH TO THE IDEAL FOR POWER COMBINING CIRCUIT BY REINHARD KNUCHEL AND KLAUS SCHONEMANN ABSTRACT The common circuits for power combining are discussed in comparison to the ideal structure. From this discussion, design criteria for multidevice oscillators arise. The ideal circuit can be approached by utilizing evanescent mode resonators. Two realizations are described: a medium Q and a low

A BROADBAND IMAGE GUIDE DIRECTIONAL COUPLER R. D. Bi rch* and R. J. ColI ier* Abstract: The paper discusses the design and construction of a novel broad band image guide coupler. A set of phase and amplitude measurements is given for the coupler in the frequency range 26-40 GHz. A theoretical model for this coupler is compared with the practical results. 

A NEW TECHNIQUE OF DEFORMATION MEASUREMENTS BASED ON MICROWAVE RESONANT CAVITIES. J.L. Besada, M. Elioes, Garc!a Cachero JI! ABSTRACT J. P1.anas, J. sanchez Miflana, J.A. , Difficulties with conventional extensometers have led to the development of a new experimental technique to study the behaviour of pre-stressed concrete at cryo-enic temperatures. A specially designed coaxial cavity is used

NOISE FIGUBB MEASUtJi!URNT THE UHF AND MICao.Aft OF 'fIWlSISTOBS Wladyslaw Adamski ABSTBACT 1JBJi'8Dd II1crowave transistors inserted into the lI1orowave trans81ss10n line are two-ports of very s8&ll gain and II1smatohed output. It causes the serious testing problems resulting from the own noise of the measurement systea. A new aethod and set-up for the traDs1stor noise figure aeasuremeat are p

ON THE EXACT S-PARAMETER MEASUREMENT OF ACTIVE DEVICES 3E 3E Ao BARANYI, J. LADVANSZKY ABSTHACT The accuracy of the S-parameter measurements have been analyzed in several publi.cations based on the assumption that the errors can be rep:uesented by a 4-pOFt connected betwee'n the ideal test set and the device to be-me'asured. Condi tions are gi ven under which the 4-po:ut represen tation is j