THE IIF NOISE PERFORMANCE OF GaAs PLANAR DOPED BARRIER MIXER DIODES I.Dale, S.Neylon, A.Condie, M.Hobden, M.J.Kearney.* ABSTRACT The paper details the 1/f noise characterisation of a range of planar doped barrier diodes. Detailed results are presented comparing the performance with conventional si and GaAs Schottky diodes. The paper also describes the methods employed to make the 1/f noise assess

70 GHZ GaAs TUNNETT DIODE J Freyer, M Pabl, W Harth, M Claassen L Gaul and H Grothe ABSTRACT The fabrication are by of the and described. GaAs diodes low investigation The fit very initial well noise values in the up as show to low the be minimum as a noise of GaAs-Tunnell for measured the the used of signal V-band cw detectable -132 dBm. of measure and output Tunnell the The diod

70 GHz PLANAR INTEGRATED OSCILLATOR ON SEMIINSULATING GaAs W Bogner, J Freyer ABSTRACT Planar oscillators with /4 rectangular microstrip-line resonators have been developed for operation with cw Impatt diodes at V-band frequencies. The impedance matching of the capacitive output coupling gap has been investigated for gap widths from 10 to 50 µm. Using GaAs Impatt diodes a maximum output

AND THEORETICAL ANALYSIS OF PHOTOCURRENTS IN GaAs MESFETs OPERATED IN NORMALLY OFF MODE Asher Madjar+, Peter R. Herczfeld+ ,Arthur Paollela* University, N.J. EXPERIMENTAL +Center for Microwave-Lightwave Engineering, Drexel Philadelphia, PA 19104 lie US ARMY LABCOM, El. Tech. and Dev. Lab., Ft Monmouth, Abstract Optical control of microwave devices, particularly MMIC, is a rapidly growing resear

OPTICALLY CONTROLLED R Saedi +, AS Daryoush+, ABSTRACT 240Hz OSCilLATOR T Berceli* In the detection of modulated light in fiberoptic links, PIN photodiodes play an important role. These devices are essentially junction devices. Under proper biasing conditions, the junction capacitance of these devices can be changed by light illumination. This paper reports the results of tuning and frequency mo

OPTICAL CONTROL OF MICROWAVE AND PHASE LOCKED OSCILLATORS PHASE DETECTORS T. Berceli*., I. Frigyes*, P. R. Herczfeldo, B. Molnar*, I. Pacher* ABSTRACT The optical control of microwave phase detectors and phase locked oscillators offers new ways to improve the performance of the optical transmission of microwave signals. This technique presents several advantages by reducing the relatively high

WAVEGUIDE LIGHT MAGNETOSTATIC WAVES INTERACTION FILM IN INHOMOGENEOUS MAGNETIC FIELDS IN A FERRITE Yu.K.Fetisov, A.A.Klimov, ABSTRACT V.L.Preobrazhensky Light scattering on magnetostatic garnet(YIG) films in inhomogeneous ed experimentally. Both collinear neous magnetic fields were and waves (MSW) in yttrium-iron magnetic fields was studiand orthogonal configuratiThe advantages of inho- ons

NEW MODELING APPROACH FOR HIGH FREQUENCY DEVICES: APPLICATION TO ULTRAFAST OPTICALLY CONTROLLED SWITCHES K.M. Connolly*, S.M. EI-Ghazaly*, R.O. Grondin*, and R.P. Joshi** ABSTRACT In many ultrafast semiconductor devices, the effects of generated electromagnetic waves cannot be neglected. These devices can be accurately simulated by combining a direct finite difference time domain solution of M

SPECTRAL DOMAIN ANALYSIS OF MICROSTRIP GAP AND GAP-COUPLED DISCONTINUITIES RESONATORS James McLean, Hao Ling, and Tatsuo Itoh1 ABSTRACT A full wave analysis of microstrip gap discontinuities in an open environment is presented. The analysis is general and includes gaps between lines of differing width. The analysis is extended to coupled resonators in order to study the coupling between

Characterisation of Discontinuities Rectan~ular and Trapezoidal in Microstrip Cross-Section with By C. J. Rai Iton and J. P. McGeehan ABSTRACT t The vast majority of published analyses of microstrip discontinuities make the often unrealistic approximation of infinitesimally thin strips. In this contribution results obtained using the Finite Difference Time Domain method are presented for the