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A STRAIGHTFORWARD MEASUREMENT METHOD TO DETERMINE THE UPPER FREQUENCY LIMITS OF R.F. CONNECTORS, CONDITIONED BY HIGHER MODE RESONANCES
THRU-MATCH-REFLECT: ONE RESULT OF A RIGOROUS THEORY FOR DE-EMBEDDING AND NETWORK ANALYZER CALIBRATION
THRu-MATCH-REFLECT: FOR DE-EMBEDDING AND ONE RESULT OF A RIGOROUS THEORY NETWORK ANALYZER CALffiRATION H-J. Eul and B. Schiek. Abstract A theory for network analyzer calibration and de-embeding is presented in which the calibration constants are evaluated via linear equations. The error-removal is accomplished by convenient matrix multiplication. It is shown that calibration procedures
MICROWAVE RESONATOR TECHNIQUE FOR MOISTURE CONTENT DETERMINATION IN SINGLE SOYBEAN SEEDS
MICROWAVE RESONATOR TECHNIQUE FOR MOISTURE CONTENT DETERMINATION IN SINGLE SOYBEAN SEEDS A.W. Kraszewskl.* , T.S. You * and s.o. Nelson * ABSTRACT A rectangular waveguide cavity operating in the H107 mode at 6.0 GHz was used to measure the resonant frequency Shift and the change in Q-factor caused by seeds of various dimensions and different hydration levels, located in the center of the cavi
A NUMERlCAL APPROACH TO MICROWAVE lMAGING
A NUMERlCAL APPROACH TO MICROWAVE lMI\G lNG S. Caorsi * , G. L. Gragnani *, M. Pastorino * t. ABSTRACT A numerical approach is proposed that aims to detect, by means of interrogating microwaves, the locations, shapes, and dielectric properties of unknown bodies inside an investigation volume. The integral vector equation of electromagnetic scattering is numerically inverted by the moment met
MAXIMUM ENTROPY IMAGE RECONSTRUCTION FROM MICROWAVE SCATTERED FIELD DISTRIBUTION
MAXIMUM ENTROPY IMAGE MICROWAVE SCATTERED Michel BARIBAUD, Mai RECONSTRUCTION FROM FIELD DISTRIBUTION Khuong NGUYEN ABSTRACT All image reconstruction methods using microwave exploration run up against inverse problems such as inverse source or inverse scattering. These are ill-posed problems because of the nonuniqueness in the solution. In this paper we present a review of the image reconstructi
AERONAUTICAL MARITIME EXPERIMENTAL TRANSPONDER ON ENGINEERING TEST SATELLITE-V
AERONAUTICAL MARITIME EXPERIMENTAL ON ENGINEERING TEST SATELLITE-V TRANSPONDER K.KONOO+,K.KOSAKA+,K.HOSHINOO++,S.YAMADA+++,N.FUTAGAWA++++,K.EISHIMA+++++ ABSTRACT Japanese Engineering Test Satellite-V (ETS-V) realized an experimental mobile satellite communication system with mobile stations such as ships, aircraft and land mobiles. The transponder which uses L-band for the mobile link on ETS-V
INTEGRATED-OPTICS APPLICATIONS IN ADVANCED COMMUNICATION SATELLITES
INTEGRATED-OPTICS APPLICATIONS IN ADVANCED COMMUNICATION SATELLITES (O), Fulvio Ananasso Ian Bennion (OO) ABSTRACT The paper discusses recent advances in Integrated Optics signal processing extremely attractive to reduce hardware complexity problems on-board next generations of communication satellites. Critical repeater components of a modern communication satellite are first identified; nex
Tunable Manifold Multiplexers - A New Possibility For Satellite Redundancy Philosophy
Tunable A New Possibility Uwe Rosenberg, Manifold Multiplexers For Satellite Redundancy - Philosophy Dietmar Rosowsky, Wolfgang ROmmer, Dieter Wolk . Abstract A theoretical study concerning a 5-channel TUnable manifold MUltipleXer (TUMUX) design has been performed using an appropriate modelling method. The findings yielded a possible TUMUX configuration. A well-suited filter type has been rea
FREQUENCY AGILE, ONE STAGE UPCONVERTER FOR SINGLE-CHANNEL SCPC SATELLITE EARTH STATIONS
FREQUENCY AGILE, ONE STAGE UPCONVERTER SATELLITE EARTH STATIONS M.J. Wlodyka and J.L. Fikart FOR SINGLE-CHANNEL SCPC * ABSTRACT Various parameters of a phase-locked upconverter for a digital SCPC satellite terminal application have been investigated. Voice tests, BER tests and spectral measurements, using constant envelope QPSK modulation have been carried out. It is shown that constant envelo
ESTIMATION OF THE COHERENCE BANDWIDTH FOR A MILLIMETRE WAVE MOBILE RADIO LINK
ESTIMA nON OF THE COHERENCE MOBILE RADIO LINK G L Siqueira * H J Thomas ABSTRACT R S Cole BANDWIDTH FOR A MILLIMETRE WAVE A bandwidth study of multipath propagation at 55 GHz in a heavily built up urban environment is presented. Estimates of coherence bandwidth between two phase coherent signals transmitted at various frequency separations are given. Results show that a reasonable estimate for