MILLIMETER IMPATT AMPLIFIER OPTIMIZATION FOR TELECOMMUNICATION SYSTEMS I. DOUMBIA, J.C. DE JAEGER, G. SAL.MER~: ABSTRACT High and moderate power Ka-Band (33-40 GHz) Impatt diode amplifiers for use especially in telecommunication systems have been investigated. We point out the means of obtaining' optimal conditions (for SDR or DDR diode parameters and operating conditions) for the princi

SPURIOUS MODE SUPPRESSION IN QUASIOPTICAL SIDEWALL COATINGS WAVEGUIDES BY LOSSY DIELECTRIC Udo Unrau + Dedicated ABSTRACT The use of lossy dielectric sidewall coatings for spurious Hmo mode suppression in quasioptical waveguides is studied. It is discussed how to select permittivity, loss tangent, thickness and coating length. A resonance absorption occurs if the electrical thickness of the coa

FILM MODE ATTENUATION DUE TO RANDOM SURFACE IRREGULARITIES J.H.Hinken~ Dedicated ABSTRACT A method for the approximate calculation of the attenuation constant dielectric film modes due to small two dimensional random boundary deviations from eveness is presented. The irregularities are replaced by effective sources. the radiated power of which accounts for the loss. suffered by an incident mode.

LOW LOSS IMPLANTED WAVEGUIDES IN FUSED SILICA D. MOUTONNET ABSTRACT With prism film coupler, we have studied the major contribution of nuclear index change and the influence of ion species, for low-loss wa- process in veguides. 

MODES IN OVERLAYED INDIFFUSED OPTICAL WAVEGUIDES M.N.Armenise - M.De Sario ABSTRACT The analysis with ferroelectric of the alization of overlayed materials hybrid optical integrated read-out indiffused optic optical waveguides fabricated in the switches, re - (e.g.LiNbO 3 or LiTa0 devices 3 ) to be employed like modulators, isolators,gyrators, and so on is presented. In particular,t

WAVEGUIDES PLATINGS A. A. Oliner FOR INTEGRATED OPTICS FORMED BY METAL and S. T. Peng ABSTRACT Theoretical analyses two waveguides for integrated employing structures similar and performance results are presented for optics which are formed by metal platings, to those in some modulators or switches. One structure is a slot waveguide, formed by a slot or gap of unplated film on a substrate

TWO DIMENSIONAL -GEOMETRY LASER ANALYSIS OF THE GaAs DOUBLE HETERO STRIPE- T. Rozzi+and T. Itoh* ABSTRACT The GaAlAs/GaAs stripe-geometry laser is analyzed using a new technique called the effective dielectric constant (EDC) method. Unlike previously reported techniques, use of the EDC method allows both vertical and sideward directions in the cross section of the laser to be taken into ac

P1W£~ ASSOCIATED WI'lH LONG PAI!H COMMllNICATluN LINKS IN TROPICAL AliEAS. V.T.V. Sbarma.* ABSTRACT Southern Railway have collected extensive data on microwave propagation over their 2000 KM net-work for over five years. The main problem of long path communication link is the occurrence of momentary deep fades of 10 to 40 dB for very short duration of 1 to 2 seconds. These dropout. account fo



AN ECONOMICAL CHANNELS Erik Myr seth MICROWAVE LINK SYSTEM FOR 2700 TELEPHONE ABSTRAC T This system, carrying 2700 telephone channels band, meets all relevant CCIR recommendations. per carrier in the 6 GHz Key features include easy maintenance during operation, all solid state except for the very high efficiency TWT, 300 channels insert. Computer aided design of SHF and IF filters and cir