10 W High Efficiency 14V HBT Power Amplifier for Space Applications

This paper presents the first development of a space-borne power amplifier using the recently developed high breakdown,high Power HBT HB20S process of UMS.The inverse F class Hybrid Power Amplifier has been designed using intensive simulation methods developed at Alcatel Space for MMICs,allowing to reach very high performances without manual tuning.The results 10 W /PAE >65%obtained with a single chip at 1.5 GHz demonstrate the capability of the process to handle with very high power densities and efficiencies

Power amplifier linearization using cartesian feedback

We present in this paper a synthesis of power amplifier linearization techniques. SSPA have to operate in their best capabilities for telecommunications applications. They have to present in the same time high efficiency PAE and low non-linearities. After a description and simulation results of the different families of linearization techniques, Cartesian Feedback experimental results are shown

Pulsed-field array performance: A TD analysis

The pulsed-field excited array antenna performance is studied via full time-domain instruments. The directional distribution of radiated energy and the directional (system) fidelity factor are employed as performance metrics. Illustrative numerical experiments highlight the expedient radiation features that are specific to pulse-train excited, linear array antennas. The analysis provides an expedient reference for estimating the detectability of the signals radiated by pulse-train excited array antennas, as needed in ultra-high rate wireless digital transfer

Neural network approach for comodeling design of multichip module.

International audienc

Low level and high linearity amplifiers in integrated technology for satellite receivers : linearisation techniques and issues.

International audienceBased on carrier to third intermodulation ratio (C/I3), reverse engineering of a two stages low level amplifier has been made in order to access the current transistor nonlinear models. Comparisons between two models of HEMT have been performed in order to choose the one which represent accurately weak nonlinearities at low level power dynamic range. By judicious choice of bias point, 12 dB improvement of linearity has been achieved. Other issues of linearization techniques have been studied so that to be suitable for MMIC implementation

High-Reliability Active Integrated Power Limiter with Sharp Compression Profile in Ka-Band in 130 nm SiGe Technology

International audienc

Low cost MMIC chipset for VSAT ground terminals

This paper presents results of a Ka-bandVSAT ground terminal MMIC chipset developed in a costreduction context. The first one, a low level multifunction designed for up-conversion with high gain driver, exhibits a17dB conversion gain with an associated P1dB output powerclose to +18dBm. The second one, a High Power Amplifier with embedded power detection, delivers 2W RF outputpower associated with 24dB of linear gain. This chipset combines performance, integration and low cost

A balanced uniplanar active MMIC combiner/divider with improved power capability

Present paper deals with a new active uniplanar power combiner/divider which presents major interest for MMICs future applications. Its design takes advantages on uniplanar interconnection technology based on coplanar strips and waveguides (CPS and CPW). Moreover, this circuit allows to realise either a 180° out of phase power combiner or a 180° out of phase power divider. Finally, it offers new potentialities compared to the early published basic circuits, featuring superior electrical performances such as an improved gain value (about 9 dB) and a suitability for an integration in more complete functions as balanced mixers