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Tubes Traveling-wave Tube The model TH 3875 traveling-wave tube (TWT) utilizes two technologies: the helix delay line, which ensures large instantaneous bandwidth, and a Wehnelt electrode in the electron gun, which allows modulation of the output signal. (The tubes can operate in CW or pulse mode, depending on the...

Software EDA Simulation Software The Advanced Design System (ADS) electronic design automation (EDA) Release 1.3 software provides real-time interactive tuning of multiple parameters, analysis and synthesis of transmission lines, filter synthesis, matching network synthesis, improved noise analysis and faster large-scale circuit envelope simulations. The software operates on most UNIX...

News from Washington Raytheon Signs UK ASTOR Contract Following nearly six months of detailed negotiations, Raytheon Systems Ltd., the UK subsidiary of Raytheon Co., has signed a contract valued at $1.3 B for the UK Ministry of Defence’s Airborne Stand Off Radar (ASTOR) program. ASTOR is a radar surveillance...

The Commercial Market Virtual Classroom System to be Installed Nationwide Anheuser-Busch Companies Inc. has selected Arel Communications and Software Ltd. to install an interactive distance learning system in the existing Busch Satellite Network. Arel’s Interactive Distance Education and Learning (IDEAL) system will provide real-time, two-way interactive training programs for...

The Book End Digital Frequency Synthesis Demystified Bar-Giora Goldberg LLH Technology Publishing 335 pages plus CD-ROM; $49.95 ISBN: 1-878707-47-7 Frequency synthesis is no longer a novelty but ubiquitous in today’s electronic equipment. Every radio design uses synthesized signals for generation and control. The purpose of this book is to...

A Novel Surface-mount Approach to Crossover Signals Anaren Microwave Inc. East Syracuse, NY Because some locations require RF signals to cross RF, RF to cross DC, or DC and DC to cross each other, a significant number of multilayer PCBs are produced. Different approaches exist so that the additional...

A PA Driver for Split-band PCS Applications RF Micro Devices Inc. Greensboro, NC Due to the growing popularity of PCS systems, there has been an increasing demand for high performance RFICs for the PCS band. The transmit and receive frequencies for the PCS band are allocated at 1850 to...

Smart Switches with a CAN Serial Communication Bus Dow-Key Microwave Corp. Ventura, CA A new series of electromechanical switches has been developed that is targeted specifically at test equipment applications where fast system integration and system flexibility for modifying and extending switch layout are required. The unique switches are...

An Ultradynamic Range GaAs Amplifier Watkins-Johnson Co. Palo Alto, CA The model AH11 GaAs amplifier has been introduced to supplement the company’s line of linear GaAs components. Operating from a +5 V DC supply in a push-pull configuration, the new IC amplifier extends the linear efficiency advantages of the...

LDMOS Transistors for FM Broadband Applications STMicroelectronics Inc. Montgomeryville, PA High efficiency and high gain amplifiers for FM transmitters are possible today with laterally diffused metal oxide semiconductor (LDMOS) technology. Presently, LDMOS RF power transistors are the proven mainstay in the high volume cellular base station power amplifier business,...