GaAs MONOLITHIC DIRECT LINEAR (1 - 2.8) GHz Q.P.S.K. MODULATOR Rallesh PYNDIAH, pa tri ck JEAN*, Re.y LEBLANC**, Jean-Chri stophe MEUNI ER Abstract Monolithic 1-2.8 GHz linear "Quaternary phase Shift Keying" modulators have been designed and fabricated with the standard D07A process of the PHILIPS MICROWAVE GaAs MMIC Foundry. Output power of the modulator is a dBm with third order in

AUTOMATIC LARGE-SIGNAL MEASUREMENT SYSTEM FOR NONLINEAR DEVICE MODELING AND MODEL VERIFICATION G. Kompa Abstract A new generalized large-signal measurement approach using an automatic reflection and transmission measurement system operating in stepped CW mode is presented. Combining network analyzer and sampling oscilloscope receiver features, the system measures the frequency dependent fundamen

SECOND-HARMONIC EFFECTS IN SCHOTTKY-BARRIER DIODE DETECTORS A.L. Cullen ABSTRACT Existing small-signal theory shows that a small amount of second-harmonic content can lead to serious error in power measurements made using a Schottkybarrier diode power sensor. The paper gives a formula valid at large signal levels, and confirms the validity of both small and large signal theories by numerical

~-PARAMETERS MEASUREMENT OF CHIP GaAs FETs ~ TO 22 GHz USING THE TRL CALIBRATION TECHNIQUE L. PRADELL*, E. ARTAL*, C. SABATER* ABSTRACT In this paper, the design of a Microstrip Test Fixture for TRL calibration is described. Experimental results for S-parameters measurement of a GaAs FET chip in the 3-22 GHz frequency range are presented. Repeatability of connections and measurements is discuss

A FULLY AUTOMATED ON-WAFER PULSED MEASUREMENT SYSTEM, WITH VARIABLE PULSE-LENGTH AND DUTY CYCLE, FOR ACCURATE LARGE SIGNAL FET MODELING J.F. VIDALOU* M. CAMIADE** ABSTRACT We present in this paper an on wafer fully-automated pulsed-measurement system allowing to extract automatically the characteristics of the non-linear current generators of a FET in function of the gate to source (Vgs) and drain

LOW NOISE AGILE CCMlJN I CATIONS MICROWAVE FREQUENCY SYNTHESIZER FOR SATELLITE M. Amati - A. Bernasconi - R. Tosini (*) ABSTRACT An attractive approach to mi crowave frequency synthesis is presented, which allows to obtain very low near-carrier phase noise and fully frequency agility required for digital Satellite Communications. A highly modular VHF Multiloop Synthesizer (VMS) is used

LOW NOISE SYNTHESIZED MICROWAVE lOCAl OSCILLATOR FOR HIGH CAPACITY RADIO SYSTEMS USING A DIELECTRIC RESONATOR AND A SAW REFERENCE K. Borst, N. Loechel, K. Wacker* DIGITAL ABSTRACT A novel solution for a synthesized microwave local oscillator suitable for high capacity digital radio systems using multilevel QAM is described. The synthesizer approach covering all radio channels of a given RF ban

A 22GHz BAND LOW NOISE DOWN CONVERTER FOR SATELLITE BROADCAST RECEIVERS Kazuo Imai, Hisao Nakakita* ABSTRACT A simple, low-cost and high-performance 22GHz band down converter has been developed for the direct-to-home satellite broadcasting system in the future. The newly developed down converter consists of a low noise HEMT preamplifier, an image recovery mixer with novel structure using d

INTEGRATED INPUT Jozef Modelski CIRCUIT FOR SATELLITE Henze, CONVERTER + , Frank * Johann Hinken * ABSTRACT This paper describes an integrated input circuit for the receiver converter of the German Telecommunication Satellite, Kopernikus, which operates in two frequency bands for two orthogonally linear polarized signals. The input circuit consists of antenna feed horn, band-pass filter a

GEOMETRlCAL OPTICS IN INHOMOGENEOUS CHlRAL IN POLARlZATION ROTATING MICROWAVE LENSES MEDIA FOR APPLICATIONS I V Lindell, A H Sihvola, A J Viitanen, S A Tretyakov 1 ABSTRACT Geometrical optics approximation for waves in inhomogeneous chiral media is introduced based on the concept of normalized wave fields, which are certain complex combinations of the electric and magnetic fields, uncoupled