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RECENT DEVELOPMENTS IN MICROWAVE SEMICONDUCTOR DEVICES FOR SATELLITE COMMUNICATIONS AND DIRECT BROADCASTING
RECENT DEVELOPMENTS IN MICROWAVE SEMICONDUCTOR DEVICES FOR SATELLITE COMMUNICATIONS AND DIRECT BROADCASTING HIROMITSU ABSTRACT Activities on microwave and millimeter-wave compound semiconductor devices in Japan are reported. Low noise performances for 2DEGFETs have been remarkably improved with sub-l/4µm gate and AlGaAs/lnGaAs structures. Applications for millimeter-wave low noise and power amplif
STATE OF THE ART OF BROADCASTING SATELLITE IN JAPAN
STATE OF THE ART OF BROADCASTING SATELLITE IN JAPAN Y. Furuhama*, M. Yamamoto**, and N. Toyama*** ABSTRACT The history of development of the Direct Broadcasting Satellite (DBS) system in Japan is quickly overviewed. Broadcasting Satellite-3 (BS-3) is used for DBS service at present. The main technologies, including transponders and antenna systems and service provided by this satellite, are in
INTEGRATED OPTICS FOR MICROWAVE APPLICATIONS
INTEGRATED OPTICS FORMICROWAVE APPLICATIONS Masayuki lzutsu* and TadasiSueta* ABSTRACf Integrated optic devices aiming for use at microwave applications are reviewed and the prospects for these new technologies are discussed.
FIELD THEORETICAL ANALYSIS OF MICROWAVE OVENS
FIELD THEORETICAL ANALYSIS OF MICROWAVE OVENS by M. Schulte1 and A.S. Omar2 ABSTRACT A field The inside feeding into The oven computer the account. computer on after code the has top been which has validated have been been heated by comparing ceramic photographed in the oven. the plate by simulated inserted energy in the theoretical aided oven waveguide method computer design near for the an
GENERALISED TRANSVERSE RESONANCE METHOD FOR NONUNIFORM LINES IN MICROWAVE INTEGRATED CIRCUITS (MIC)
FOR GENERALIS ED TRANSVERSE RESONANCE METHOD NONUNIFORM LINES IN MICROWAVE INTEGRATED CIRCUITS (MIC) S. MARCHETTI 1 and T. ROZZIl.2 ABSTRAcr A new "Generalised Transverse Resonance Diffraction Method" is presented for obtaining an analytical description of dispersion characteristics and complex impedance of non-uniform Printed Transmission Lines as a function of position. A single "taper mode"
RADIATION FROM DISCONTINUITIES IN DIELECTRIC RIB WAVEGUIDE
RADIATION FROM DISCONTINUITIES IN DIELECTRIC RIB WAVEGUIDE T. Rozzi *+, L. Zappelli * ,M. N. Husain + Abstract Dielectric rib waveguides are common transmission lines in integrated optics, with interesting possibilities for millimetrics. Guided modes of uniform lines have been extensively investigated. In actual circuits, discontinuities or bends produce radiation from the waveguide, that can n
MICROWAVE CIRCUITS DESCRIBED BY TWO-DIMENSIONAL VECTOR WAVE EQUATION AND THEIR ANALYSIS BY FD-TD METHOD
MICRO"AVE CIRCUITS EQUATION . DESCRIBED AND THEIR BY TIlO-DIMENSIONAL VECTOR ANALYSIS BY FD-TD METIlOD . "AVE Cezary MROCZKOWSKI. Wojciech K. GWAREK ABSTRACT The paper postulates distinction of a class of microwave circuits described by two-dimensional vector wave equation. It proposes to refer to them as vector two-dimensional or 2-DV circuits to distinguish them from the circuits descr
WAVE PROPAGATION IN CHIRAL DIELECTRIC WAVEGUIDES
WAVE PROPAGATION IN CHIRAL DIELECTRIC WAVEGUIDES Markku I. Oksanen, Paivi K. Koivisto 1 ABSTRACT In this paper chiral slab waveguides are explored and their chracteristical features are described. The theoretical analysis is based on plane wave expansions for the fields in different regions of the slab and their continuity requirements at the slab interfaces. The theory is illustrated by dispe
COMPUTATION OF PROPAGATION PARAMETERS OF MODES IN A CIRCULAR WAVEGUIDE LOADED WITH A RING-SHAPED DIELECTRIC
COMPUTATION OF PROPAGATION WAVEGUIDE PARAMETERS OF MODES IN A CIRCULAR DIELECTRIC LOADED WITH A RING-SHAPED G. Macchiarella ., G. B. Stracca ., G. G. Gentili ., M. Politi . Abstract The paper presents the results of the computation of the propagation parameters (eigenvalue and attenuation constant) of the modes in circular waveguide partially filled with a dielectric ring. A new classi
CONSTRUCTION OF DYADIC GREEN'S FUNCTIONS FOR THE EM FIELD IN PLANAR LAYERED MEDIA USING WAVE MATRICES FOR THE ELECTRIC HERTZ POTENTIAL
CONSTRUCfION OF DYADIC GREEN'S FUNCfIONS FOR THE EM FIELD IN PLANAR LAYERED MEDIA USING WAVE MATRICES FOR THE ELECTRIC HERTZ POTENTIAL Dennis P. Nyquist*, ABSTRACf Dyadic Green's functions for the EM field maintained by electric currents immersed in a planar layered environment are constructed through electric Hertz potentials using wave matrices to determine the spectral amplitudes in their Somme