TWO-THERMOMETER TECHNIQUE FOR CALORIMETER-TYPE WAVEGUIDE POWER METERS A.E. Fantom * and I. Yokoshima t ABSTRACT This paper presents in calorimeter-type principle a method of reducing the r.f.-d.c. waveguide power meters by the use substitution of two error thermometers. on this A calorimeter for the frequency range is described. 60 - 90 GHz based 

ON AUTOMATIC ~mASUREMENT Krzysztof ABSTRACT Grabowski, OF MICROWAVE NOISE FIGURE ~~adys~aw Adamski, Jerzy D~browski In conventional microwave automatic measurements of the amplifier noise figure the measurement results are distorted by an error which is due to the noise of the receiver itself which is connected in cascade with the amplifier under test. This error depends on the receiver noise

NON-DESTRUCTIVE MEASUREMENT OF COMPLEX PERMITTIVITY FOR DIELECTRIC SLABS Marc C. Decreton and V. Andriamiharisoa ABSTRACT A method has been developed for a precise non-destructive measurement of the dielectric constant and losses of slab-like samples, such as micros trip substrates for instance. The test setup basically consists of an open-ended rectangular waveguide whose flange is place

NEIl MICROW'AVE SYSTE.'M TO DETEHMINE OF SMALL DIELECTRIC THE CO:t-1PLEX PER}1ITTIVITY SAMPLES AND SEJ.fICONDUCTING J. l-1usil x, F. ~;icCkx, A. BUrger +, J. Kar lovsky + Abstraot: This dielectric ler than permittivity measure electric are rowaves, system of the tained by paper describes the of very for materials. way than the slab new small microwave transverse This the the samples material of

TIME DOMAIN IMMITTANCE MEASUREMENTS U. PILLER ABSTRACT: The fundamentals of the time domain reflectometry (TOR) are reinvestigated and the measuring method is extended to time domain transmission (TOT). It is shown. that for immittance measurements high resolution can be achieved by either decreasing the risetime or increasing the amplitude of the ramp test pulse. The effect of fixed reactance

A 700 W 12 GHz TWT FOR TV SATELLITE APPLICATIONS Horst Seunik,* Fritz Hanf,* Sven Wallander + Abstract As part of a 700 W CW transponder for a direct TV broadcasting satellite operating in the 11.7 to 12.5 GHz band, a traveling-wave tube (TWT) and directly radiating multistage collector are being developed. The state-of-the-art TWT is periodic permanent magnet (PPM) focused and incorp

RESULTS OF THE DEVELOPMENT BROADCASTING SATELLITES OF A 700 W 12 GHZ TWT FOR DIRECT TV D. Deml +, K.H. Bluhm +, H. Radlinger + ABSTRACT The paper describes the first phase of the development of a satellite TWT with an output power of P2 = 700 W. Design considerations for more than 7 years life are presented. The concept of the tube with coupled cavity, self-radiating 5 stage collector and

LOWER Koji VOLTAGE Mizuno, OPERATION Norio Kuji, OF THE LEDATRON and Shoichi Ono ABSTRACT We have successfully observed the millimetre wave oscillation field distribution of the Fabryin the Ledatron due to the TEM0 2 Perot mode, which had been predicted by our theory of operation. Through operation of this mode, we can reduce an electron accelerating voltage about 10 percent to obtain the same