SUBMILLIMETER WAVE OSCILLATION FROM GaAs TUNNETT DIODE J. Nishizawa*, K. Motoya** and Y. Okuno** ABSTRACT The Tunnel injection lransit lime negative resistance (Tunnett) diode has been thought to be useful active device in the frequency range from 100 to 1000 GHz and will be positioned as a semiconductor device between the GaAs static induction transistor (SIT) and Raman- and Brillouin-laser

GRATING-TUNER MILLIMETERWAVE IN DIELECTRIC CIRCUITS IMAGE LINE FOR INTEGRATED Klaus Solbach* ABSTRACT It is shown that concentrated line discontinuities for matching purposes, like e.g. a sliding screw, in open dielectric image line can cause heavy radiation losses. A distributed reflection structure which can be used as a "sliding screw"-tuner with neglectable radiation losses in dielectric

STUDY OF IMAGE GUIDE BANDWIDTH R. D. Birch* and R. J. Collier* Abstract The paper discusses the various parameters which determine the bandwidth of image guide and includes a series of theoretical graphs. As a result, the optimum design parameters for wide-band image guide will be given. The paper also includes some measurements of the bandwidth of some image guide components. 

ANALYSIS OF FIN-LINE DISCONTINUITIES by Hadia El Hennawy and Klaus SchUnemann ABSTRACT Various lysed. capacitive diode. meters. forming discontinuities in the slot width of fin-lines are accurately These include a step in the slot width, an inductive notch, a strip, and a longitudinal stripe for mounting a semiconductor Equivalent circuits are derived and related to the geometrical The resul

PRINTED-PROBE HYBRID COUPLER FOR THE 3-MM BAND Paul J. Meier* ABSTRACT A printed-circuit, 7-element, 3-dB hybrid coupler has been developed for application to low -cost systems operating in the 3-mm atmo" spheric window. Based on a computer-aided analysis, a prototype coupler has been constructed and tested. Across a 3. 7-GHz band centered at 94 GHz, the measured isolation is 22 dB or better,

SPECTRAL SHIELDED Tatsuo DOMAIN IMMITTANCE WITH APPROACK TUNING FOR DISPERSION CHARACTERISTICS OF MICROSTRIPS Iton SEPTUMS' + * ABSTRACT A method for deriving dispersion relations in a new versatile MIC transmission line, a microstrip line with tuning septums, is developed based on the spectral domain immittance matrix. Formulation is accomplished almost by inspection. Some examples of

MOI1ENT METHOD OF DESIGNING MATCHED 11ICROSTRIP BENDS Peter Anders and Fritz Arndt ABSTRACT The equivalent capacitances and inductances of matched microstrip bends with arbitrary angle are calculated by the method of moments. Three forms of matching are considered: a one-sided curved transition, a double-sided curved transition and a mitered bend, where the optimum miter percentage is compu

WAVEGUIDE TO MICROSTRIP MULTI-APERTURE DIRECTIONAL COUPLER S.N. Prasad and S. Mahapatra* ABSTRACT A navel rectangular waveguide to microstripline multi-aperture directional coupler has been developed for operation in X-band. The results of investigations on coupling through large apertures used as elements of a multi-aperture coupler and the design of a waveguide to microstripline directiona

LOADED Q-FACTORS OF PARTIAL-HEIGHT CIRCULATORS. AND FULL-HEIGHT TRIANGULAR RESONATORS FOR USE IN WAVEGUIDE G. Riblet, J. Helszajn and B. O'Donnell ABSTRACT Except for some data on single and coupled, quarter-wave long, disk resonators operating in the waveguide turnstile mode, very little information is available on the loaded Q-factor of directly coupled resonators for use in the design o

EXACT DETERMINATION FOR THE RESONANT FREQUENCIES AND FIELDS OF DIELECTRIC RESONATORS. . P. GUILLON, Y. GARAULT J. et D. ROUSSET, ABSTRACT: A new approach is proposed to determinate resonant frequencies and field plots of dipolar electric and magnetic modes of cylindrical dielectric resonators. It consists to solve Helmotz equation expressed in cylindrical coordinates by means of finite di