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

ELECTROMAGNETIC NON-PERTURBING MICROPROBES A. DEFICIS, A. PRIOU (+) ABSTRACT: Since recherches temperature 1971, the Microwave Department of the 'Centre d'etudes et de de Toulouse' is effecting research on the problem of measuring and power density in electromagnetic fields. of obtaining a dielectric waves was studied. microprobe not interfering with The possibility electromagnetic 

A~THOD MILLIMETER M. Spalla TO MEASURE THE CHARACTERISTICS WAVES Tamburello, L. Zanforlin + OF BIOLOGICAL. MATERIALS AT o,C. ABSTRACT - A new method of biological sample characterization at millimeter waves has been studied to verify and extend Webb's experimental results. This method, based on interferometric measurements, is suitable to obtain an absorption spectrum of a living bacteria

MEASUREMENTS OF 0.915, 2.45 and 9.0 GHz ABSORPTION IN THE HUMAN EYE L-E.Paulsson ABSTRACT The absorption of microwave power on the axis of the eye was measured at 0.915, 2.45 and 9.0 GHz on a model of a human head. The absorbed power shows an essentially exponential decrease with the distance from the cornea at 9.0 GHz. At 2.45 and 0.915 a maximum in the absorbed power pattern occurs within the

NOISE SUPPRESSION IN MICROWAVE IMAGERY BY EXPLOITATION OF THE MTF APPROACH TO HUMANVISION A.P. Anderson,* P.R. Armstrong,* J.C. Bennett,* + and J.E.W. Mayhew ABSTRACT Optimised presentation of images from a microwave holographic system is essential, particularly the suppression of the effects of noise on the human visual system. Recent research into the human visual system has led to Fourie

A 'MICROWAVE EYE' CAN BE ALMOST HUMAN A.P. Anderson and S.J. Mawani ABSTRACT Microwave imagery is commonly accepted to have inherently lower resolution than optical systems produce, and small scale microwave imaging systems should be particularly poor in this respect. Since Man is an optical imaging system, and also the ultimate recognition system, it is interesting to compare his performance

SPHERICAL NEAR-FIELD FAR-FIELD TECHNIQUES* Frank Jensen** and Flemming Holm Larsen*** ABSTRACT Spherical wave expansions are well suited to transform measured near-field data of an antenna to far-field data. In this paper a comparison between techniques for obtaining spherical wave expansions from near-field measurements is presented. The techniques are compared with respect to requirements