A NEW PRINCIPLE LINEAR PHASE FOR MEASURING ELECTRICAL LENGTH AND DEVIATION FROM Hugo Vifian* ABSTRACT This paper presents a unique way to measure the equivalent electrical length of a network as well as its deviation from linear phase. The measurement technique used is based upon a variable length transmission line simulator, built into the IF-structure of a 1.3 GHz Network Analyzer, but can

DEVELOPMENTOF A SENSITIVE AUTOMATIC REFLECTO-INTERFEROMETER FOR MEASUREMENTS IN THE Q AND E BANDS (35 by MM. A.M BOTTREAU and 70 GHz) APPLICATIONS. *, Cl MARZAT*and J MOREAU* ABSTRACT. - The determination of the complex 70 GHz (8 and 4 milimetre wavelengths) presents soon as it becomes necessary to study materials and having large loss tangents (tg ~ 1). Therefore, displacements of the permit

WIDEBAND MEASUREMENT OF MILLIMETER CIRCUITS FOR VARACTORS AND IMPATTS G. CACHIER"'", J. STEVANCE"', J.L. VATERKOWSKI"'1f , D.C. DEJAEGER'Ifr"" ABSTRACT We propose to measure the impedance of a millimeter - IMPATT circuit by using a modulated microwave signal source or a signal with two frequency components. The diode is biased below its breakdown voltage, and it is used both as a

DIELECTRIC MEASUREMENTS INSIDE MICROWAVE OVENS AND AUTOMATIC CONTROL OF MATERIALS HEATED R.G. ooSISIO*, R. DALLAIRE**,and P. PROMATHANSY* ABSTRACT. Preliminary results obtained non-contact ted inside on an apparatus and a method for of materials hea- measurements on the dielectric properties operating microwave ovens, are presented. Variations in the dielectric constant and the dielectric

COMPLEX PERM1TTIVITY RESONATOR. MEASUREMENTS OF LIQUIDS USING A MICROWAVE DIELECTRIC S. TOUTAIN, J. CITERNE,P. GELIN, J.P. PARNEIX, L. RACZY * ABSTRACT Some substances as "liquid crystals" are not available in large quantities. In this paper, we present a measurement method of complex permittivity of liquids in Land C bands. This method is based upon the study of resonance frequency of the

THEORY AND DESIGN OF MEDIUM GAIN DIELECTRIC ANTENNAS L.P. Ligthart, C.J. den Hollander ABSTRACT Double application of the Kirchhoff-Huygens-vector formula facilitates computation of the far field radiation pattern of dielectric antennas with rotational symmetry excited by cylindrical waveguides within practical com- puting times. . In this paper special attention will be given to the n

BEAM-WAVEGUIDE FEED FOR SATELLITE COMMUNICATION EARTH STATION WITH FREQUENCY REUSE J. ROGER, C. AUBRY, J. POITEVIN - * ABSTRACT This paper describes the analysis, design and experimental evaluation of a frequency accounts formulas a more as well as Beam-waveguide feed for satellite communication earth station with GHz band. A theorical model is presented which for the electromagnetic behavio

A NEW TRACKING COMMUNICATION MODES COUPLER USING A CORRUGATED FEED R>R SATELLITE EARTH-STATION ANTENNA S. DRABOWITCH * ABSTRACT A corrugated tracking modes coupler operating with any linear or circular polarization is described. This device propagates without disturbance the received and transmitted.HE11 communication modes, and selects as tracking modes, the TMO and HE21 modes by use of their

BEAM WAVEGUIDE FEED FOR FREQUENCY RE-USE IN CASSEGRAIN ANTENNAS. B. CLAYDON ABSTRACT The use of a beam waveguide feed for a Cassegrain earth station antenna has several mechanical advantages over a conventional feed. To ascertain the suitability of this type of feed for orthogonal polarization frequency re-use applications, a near-field diffraction analysis has been made of a configuration

ANALYSIS AND SYNTHESIS OF CORRUGATED CONICAL HORNS Paolo BIELLI (*) - Salvatore DE PADOV A (*) - Enrico PAGANA (*) ABSTRACT The characteristics of corrugated conical horns, radiating the bal-, anced hybrid mode HE11 have been summarized in a number of linear curves giving the beam width at different levels versus the horn flare angle (2) and versus the radius of the horn aperture, no