MICROWAVE RADIOMETRIC VOLUNTEERS THERMAL PATTERNS AND ANTENNA MATCH IN HEALTHY FEMALE . * K. L. Carr,* R. J. Blelawa * , J. F. Regan, A. M. El-Mahdl .+ , J. Shaeffer + . ABSTRACT Microwave thermographic profiles of the breast region of female volunteers were obtained using a 4.7 GHz radiometer. Apparent temperature elevations of about O.4oC were seen in the areQlar (nipple) region compared to t

MICROWAVE DEVICE FOR THAWING BLOOD PLASMA S. C. Kashyap* and G. Rock+ ABSTRACT This paper describes a microwave heating device for thawing frozen blood plasma. The device is shown to achieve uniform thawing of the plasma to the desired temperature in a short time without doing any damage to the blood plasma. 

GRATING LINE SCANNER FOR MILLIMETRE Hans Hellsten'~ WAVES ABSTRACT Line scanning by means of a Fresnel band which rapidly moves in front of the antenna aperture. The method is fairly high scanning frequency can be obtained, ideal, and the scanner itself is quite compact. is obtained reflection grating, in the form of a flexible across a system of rollers advantageous in that the scan pa

NEAR FIELD COMPUTATION ON ELECTROMAGNETIC SCATTERING BY MOMENT METHOD Chen Han-kui, Li Ming-yi, Sun Nai-hua* ABSTRACT The moment method is applied to calculate the near field around infinitely long scattered perfectly conducting and perfect dielectric cylinders of certain cross sections. An approximate formula for the forward field intensity for the case of square perfectly conducting c

A DUAL-FREQUENCY CHARACTERISTICS CIRCULAR DISC MICROSTRIP ANTENNA WITH TUNABLE J. S. Dahele and Kai Fong Lee * ABSTRACT A microstrip antenna consisting of two stacked-circular discs has dual-frequency characteristics which is not tunable. It is shown here that a dual-frequency antenna in which the resonances are tunable, can be obtained by introducing air gaps between the upper and lower

RADIATION PLANES PATTERNS OF RECTANGULAR MICROSTRIP ANTENNAS ON FINITE GROUND J.A. Aas and K. Jakobsen ABSTRACT A moment method and a GTD method have been developed to calculate the E- and H-plane radiation patterns of rectangular microstrip patch antennas on rectangular ground planes. Both methods are essentially 2-dimensional. Calculated patterns are compared with measurements. The agreem

AN ANALYSIS INCLUDING J.R. Mosig OF ARBITRARILY SURFACE WAVE Gardiol SHAPED MICROSTRIP ANTENNAS EFFECTS and F.E. * ABSTRACT The accurate determination of surface currents in microstrip planar antennas requires the solution of a two-dimensional singular integral equation of electric type (EFIE). The first problem encountered when solving this equation numerically, is the obtention of a fast

SPLINE BOUNDARY ELEMENT SOLUTION OF DIELECTRIC SCATTERING PROBLEMS S. Bilgen* and A. Wexlert ABSTRACT Summarizes the methodology of the high-order boundary element method, using cubic spline interpolants for the source distribution and arbitrary surface shape, in the context of two-dimensional time-harmonic scattering problems. The high accuracy and efficiency attained are indicated. Exte



VIVALDI ANTENNAS FOR SINGLE BEAM INTEGRATED RECEIVERS T. Thungren*, E.L. Kollberg*, K.S. Yngvesson** ABSTRACT Slot line antennas intended for rnm-wave single beam applications as well as for imaging systems are experimentally investigated. In particular the Vivaldi antenna is investigated, and it is found that a 3 dB beam width of typically 300 is obtained and a 10 dB beam width of abou