SCINTILLATIONS DUE TO RAIN ON SATELLITE-TO-EARTH RADIO LINKS C. CAPSONI - M. MAURI - A. PARABONI (°) ABSTRACT In this paper the signal fluctuations arising at the receiving antenna on a satellite-to-earth radio-link during intense precipitations are studied. The four Stokes parameters, which fully describe the power and the polarization status of the wave, are evaluated in the 11 to 30 GHz





WAVEGUIDE TESTS BY MEANS OF ERROR RATE MEASUREMENTS AT DIFFERENT CLOCK RATES OF 640, 320 AND 160 Mbits/s Werner Lorek *) ABSTRACT For determining the transmission properties of waveguide links, an experimental repeater for one channel with variable bandwidth was designed for error rate measurements at clock rates of 160, 320 and 640 Mbits/s. The length of the experimental waveguide link used a

A LOW -LOSS MICROSTRIP X-BAND DIODE PHASE SHIFTER By Charles ABSTRACT W. Craig and Harvey K. Hom* An X-band four-bit phase shifter capable of handling 440 watts peak average transmission loss less than 1. 7 dB has been constructed on phire substrate, with 8 PIN diodes as the only discrete componenets. tion loss is the lowest which has been acknowledged at this time for diode device. The unit

PERFORr~NCE CONSIDERATIONS FOR DUAL MODE RECIPROCAL PHASERS C. R. Boyd, Jr.* and L. R. Whicker** ABSTRACT This paper reviews parameters for dual mode reciprocal phasers, which operate most effectively in the 5-25 GHz range. Items which receive attention include bandwidth, insertion loss, power handling, size and weight. Computed design relations are presented with some supporting experimental d

PERIODICALLY LOADED FERRITE PHASE SHIFTERS A.J.F. Orlando and B. Chambers ABSTRACT. This paper describes a general treatment of periodically-loaded ferrite phase-shifters by considering the loading essentially continuous if there are many obstacles per wavelength. Its advantage over an attempt made to treat the structure as a cascade of transmission line sections loaded by shunt susceptanc

PROPAG~TION K.F. Ivanov IN HELICAL and K.G. LINE Kostov+) WITH LATCHING FERRITE ViliDIUI1 ABSTIU~CT The propagation of circularly symmetrical mode in a thin- wire cylindrical helix, inhomogeneously loaded with latching ferrite medium magnetised azimuthally to remanence is studied theoretically. Curves based on numerical solution of the characteristic parameters equations for a variety

A 30 GHz LOW NOISE DOWN CONVERTER Michael Krefft +. A!3STRACT A report will be given of the development of a single ended low noise down converter to convert a signal of 1 GHz bandwidth in the range of 27.55 - 28.55 GHz to an intermediate frequency of 1 - 2 GHz. The mixer, realized in waveguide form, consists of a directional filter to combine LO and signal power and a diode mount. The latt

A 26.5-To-40-GHz '---J * PLANAR BALANCED MIXER Ulrich H. Gysel ABSTRACT--The is described. with line a cutoff design and performance of a MIC 26.5-40 GHz mixer The mixer utilizes GaAs beam lead Schottky barrier frequency of 750 GHz in a balanced loss for arrangement the full exhibits with waveguide. for Conversion dBrn LO diodes slot- and coplanar waveguide excellent LO band is 7.6 the R