4 GHz LOW NOISE PARAMETRIC ~ AMPLIFIER L. F. Franti ABSTRACT A rugged and reliable 4 GHz uncooled parametric amplifier is presented. The solution is particularly suited to domestic systems and for installations where cost of maintenance is a problem. It complies with the specifications for ground stations operating with Intelsat Satellites. Some features are: 1) a low pump frequency of 44 GHz f

PRESENT AND FUTURE PARAMPS CAPABILITY OF MILLIMETER WAVE PUMPED James J. Whelehan Abstract Parametric amplifiers have been extensively used in many applications (communications, radar, ECM, etc.), through Ku-band (~20 GHz), in which packaged varactors with relatively high cutoff frequencies and moderate self-resonant frequencies have been used. The extension of par amps into the higher freque

A POWER BIPOLAR TRANSISTOR OPTIMIZED FOR LINEAR PERFORMANCE UP TO 5 GHz R. W. Wong, J. T. C. Chen, C. P. Snapp, R. Solomon, R. R. Stewart ABSTRACT. A linear power transistor with 1.6 µm emitter width, 34 emitter sites, and individual emitter ballast resistors has been developed using a new transistor process which has excellent reproducibility. Such a transistor has been packaged with a sing

THE APPLICATION OF NEGATIVE FEEDBACK TO MICROWAVEBIPOLAR TRANSISTOR AMPLIFIERS J.L.B. Walker, E. Hughes and K. Wilson ABSTRACT It is shown that RLC feedback between the base and collector of a microwave bipolar transistor enables one to design a single-stage unbalanced amplifier with a two-octave bandwidth (0.5 - 2.0 GHz). Over this bandwidth the measured terminal v.s.w.r.'s are within 2:1,

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