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

OPTIMUM P.J.B. DESIGN OF CORRUGATED A.D. FEEDS FOR LOW CROSS-POLAR Parini RADIATION Clarricoats, Olver and C.G. ABSTRACT The paper describes the prediction and measurement of the cross-polar radiation from corrugated feeds. The influence of the flange, periodicity of the corrugations and corrugation depth is identified and design recommendations are made. Satisfactory agreement between ex

MATCHE~FEEDS FOR OFFSET PARABOLIC REFLECTOR ANTENNAS A W Rudge and N A Adatia ABSTRACT In many practical applications the performance of offset parabolic reflector antennas are limited by the reflectors' depolarising and beamsquinting properties. The paper describes progress in the development of a new class of primary-feed antennas which overcome these major limitations. Computed data base

A MILLIMETER-WAVE THERMOGRAPH FOR HUMAN BREAST AND SPINE SCANS Jochen Edrich* ABSTRACT Millimeter-wave of the human thermographs for body are described. remote, noninvasive Their penetration temperature depth ranges sensing from 0.1 mm to 1 cm thus overcoming the depth I imitations of conventional infrared thermographs by several orders of magnitude. Potentially useful applications

MICROWAVE HEATING OF MALIGNANT. MOUSE TUMORS ENCAPSULATED IN A DIELECTRIC MEDIUM J. E. Robinson*, D. McCulloch*, A. C. Cheung*, E. A. Edelsack* ABSTRACT A new technique for microwave (2450 MHz) heating of C3H mammary tumors is described. 1 cm tumors were encapsulated in 5 cm spheroids of a material dielectrically similar to biological tissues. When similarly heated, encapsulated tumor exhib