EFFECTS OF TUNNELING ON HIGH EFFICIENCY IMPATT AVALANCHE DIODES by M. CHIVE, E. CONSTANT, J. PRIBETICH, M. LEFEBVRE ABSTRACT: We study theoretically and experimentally the effect of a tunnel injection on high efficiency IMPATT avalanche diodes characterized by high low or low high low doping profile. Taking into account effects of tunneling some characteristics usually observed of such high

MILLIMETER WAVE OSCILLATIONS FROM TUNNETT DIODES Jun-ichi Nishizawa, Tadahiro Ohmi and Toshi-aki Sakai* Space and time dispersions of carrier distribution included in an avalanche build up process are discussed in Si and GaAs, especially concentrating on exchange frequency from an avalanche to a tunneling in a carrier inj ection mechanism in transit time diodes. GaAs multilayer structure has b

AN IMPROVED TRAPATT PULSE GENERATOR WITH APPLICATIONS S.C. Cripps * and J.E. Carroll * ABSTRACT The development and application of a gigahertz repetition rate pulse generator using the anti-parallel Trapatt circuit is described. The pulse generator produces 100 psec risetime pulses at 1 GHz repetition rates with over 200 volts amplitude into a 50 ohm load or open circuit and up to 4 amps in

A 12 VOLT X-BAND AVALANCHE DIODE *B. CULSHAW and*R.A. GIBLIN Avalanche diodes are becoming established as rf power sources in the microwave spectrum from X-band upwards. The conventional device does suffer from some practical disadvantagess of which the most notable are the dissipation of, typically, 10 Watts of dc power as heat from a very small device and the requirement for high bias voltag



INFRARED INTENSITY MODES MODULATION OF YIG USING LONG WAVELENGTH FREQUENCIES MAGNETOSTATIC B.Yazgan* AT MICROWAVE ABSTRACT Surface and volume magnetostatic mode resonances of an axially magnetized YIG rod is used for the diffraction and intensity modulation of 1,15M He-Ne laser beam.YIG crystal is excited with a dielectric microwave resonator at S band.Amplitude modulation of the microwave



PROPAGATION PROPERTIES OF OPTICAL MODES IN DIELECTRIC THIN FILM FIBER WITH CONVEX SURFACE Yasumitsu Miyazaki BY CONFORMALMAPPING TECHNIQUE ABSTRACT Single material fibers made of low loss material may be superior to cladded or mixed material fibers with respect to optical propagation properties concerned with absorption losses. Thin film fibers with convex surface have self focussing propert