MM-WAVE DIELECTRIC RESONATOR AFC DISCRIMINATOR I G Gosling ABSTRACT A novel frequency discriminator using a dielectric resonator is described, for use at frequencies circa 30GHz. The circuit achieves excellent temperature stability ( < 6ppm/deg C) at very low unit cost, and overcomes the need to use two closely tuned resonance modes. It is useful in particular for automatic frequency cont

A NOISE REDUCTICN TB:::HNIQUE FOR MULTIPLIER TYPE MICRavAVE SOORCES Heinz-Ji.irgen Siweris and Burkhard Schiek ABSTRACT The reduction of phase noise of multiplier type microwave sources by neans of an autonatic phase control loop is described. The loop canprises a frequency discriminator, a loop amplifier, and a phase IIDdulator. Theoretical performance limits are derived for single freque

OPTIMUM DESIGN OF CAVITY STABILIZED FET OSCILLATORS A. Jacob and K. Schunemann* ABSTRACT The optimum circuit topology of cavity stabilized out from comparing various circuit configurations. Q-factor, stable tuning range, FM-noise and power zing resistors are related by both a large-signal FET oscillators is found Output power, loaded dissipated in stabiliand a noise analysis. 

TUNABLE LOW NOISE GAAS FET OSCILLATORS AT 13 GHZ P.Brand + ABSTRACT Today GaAs-FETs are able to generate relative high output power at high frequencies and good efficiency. Therefore they displace GUNN-and IMPATTdiodes in many oscillator and amplifier applications. A big disadvantage of oscillating FETs is their high near carrier noise. But in many cases this problem can be solved by using high

26GHz Stabilized IMPATT with Frequency Modulator Resonator Isao Haga a Dielectric Mizumura, Eiji Nagata, Motoo ABSTRACT A 26GHz-band IMPATT direct oscillator frequency modulator stabilized with a dielectric resonator has been developed. The developed frequency modulator consists of MIC, presenting great potentials for reduction in device size and cost. The frequency modulator incorporating

INVEsrrIGATION LASER O:b' LIICRO,irAVE PROPEl1TIES OJ!' GaAlAs INJECTIOn I.Angelov,A.Spasov,L.Urshev+ ABSTRACT The results of the investigation of microwave properties of GaAlAs injection laser are presented. The system consisting of a medium power FET driving amplifier and an injection laser is developed with flat light output response to the micriwave power in a broad frequency range. 

NONCONTACT MEASUREMENTSOF PERMITTIVITY TARGET WITH BISTATIC Zhou Zheng-Ou,Ding ABSTRACT RADAR OF A SMOOTH CONV~X Yi-Yuan,Gong Yao-Huan and Huang Shun-Ji* This paper describes noncontact measurements of the permittivity of a smooth convex target. Two methods are presented. The first one is developed by modifying Erteza and Doran's method!l}. The second one is measuring the reflection coefficie



PERFORMANCE OF A CRYOGENIC 3 MM RECEIVER ON A 14 M RADIO TELESCOPE .... Antti Raisanen, James Lamb, Arto Lehto, Martti Tiuri, Juhani Peltonen ABSTRACT A cooled receiver having a DSB quency range 75-95 GHz has been The quasioptical beam switch is amplifier at 1.4 GHz. A phase ring-filter. This receiver has Metsahovi 13.7 m radio telescope. noise temperature of 80-140 K in the frebuilt fo