RF POWER SOLID STATE AMPLIFIERS FOR MICROWAVE RADIO (~) A. FAOTTO ABSTRACT In this developed bed. The systems ements paper main are solid state microwave of these with power "division amplifiers, link which have been by GTE Telecomunicazioni advantages considered, power. by using microwave for radio equipments, are descri= amplifier efficiency improv= and multiplication" the high refe

LINEARIZATION OF L-BAND POWER TRANSISTOR AMPLIFIERS TO BE SIGNAL USED WITH A MULTICARRIER * By S.A. PADOVANI, P.L. FAJA * ABSTRACT Two linearization methods: -Feed-back loop -Forward bias of base emitter junction are used in the design of L-Band linear amplifiers for multi carrier operation in view of achieving C/I figures in the ran ge of 24 dB to 26 dB without significant sacrifice of the e

A 14GHz 2kW KLYSTRON FOR EARTH STATIONS OF BROADCASTING SATELLITE SYSTEMS Shigemoto MURATA*, Kaizo YAMAMOTO*, Takayoshi SHINOZAKlt, and Hisaaki SATOt ABSTRACT A klystron has been developed as a transmitting tube for earth stations of transportable or mobile type. The klystron, rather than the TWT, was chosen to make the transmitter compact. It has five cavities and mechanical pre-set tune

THE EFFECT OF RAIN ON ECHOES IN THE VICINITY OF mm-PULSE Werner RADARS Wiesbeck ABSTRACT In recent years the development of mm-wave pulse radars was pushed forward very rapidly. It can be shown that precipitation echoes, the main interference source, cannot be computed from the well-known formula for weather radars in which a conical energy distribution is assumed. It is necessary to appr

A METHOD TO REDUCE SYSTEMS (MLS) THE NEED FOR LARGE ANTENNAS IN MICROWAVE LANDING B. Forssell * ABSTRACT The replacement of the present Instrument Landing System (ILS) by the new Microwave Landing System (MLS) which is supposed to begin about 1980 is caused by increasing requirements for capacity, accuracy and coverage which ILS cannot meet. The increased accuracy is largely achieved by th

SURFACE ROUGHNESS MEASUREMENTS FM-CW RADAR ALTIMETERS BY USING LOW-RESOLUTION Sune R.J .Axelsson ABSTRACT When a radar altimeter is used over added to the output signal. The mean range spread of the reflectors located ship between noise and range spread roughnesses by low-resolution radar favorably with theoretical predictions. a rough ground surface, a noise component is deviation of the noise



OPTICS OF GUIDED WAVES Reinhard Ulrich ABSTRACT In multimode waveguides, many classical optical effects continue to exist in modified form, and new optical effects are observed. The talk gives a review of some of these effects. The thin-film optical waveguide, a 2 dimensional (2D) propagation medium, may be considered as a versatile artificial dielectric. Trough local design of the guide, a v

NEW LOW GAIN S-BAND SATELLITE ANTENNA WITH SUPPRESSED BACK RADIATION N.C. Albertsen, + P. Ball~ng . + and F. Laursen ++ ABSTRACT: Theoretical and experimental results are presented for a waveguide antenna with a cardoid-shaped pattern. The antenna, which operates in the S band, is proposed for telemetry and telecommand on future scientific satellites. The radiation takes place thro

ACTIVE RECEIVING THICK FOLDED DIPOLES ARRAY WITH GOOD SENSITIVITY BETWEEN 0.4 GHz AND 1 GHz. ~~ J.P. DANIEL, G. DUBOST. ABSTRACT. This paper describes the design and testing of a broadband active thickfolded-dipole, used for reception, between 0.4 and 1 GHz. This active antenna wnich exibits a good sensitivity can be used as an element of a directive array without a loss of bandwidth