RF & Microwave Industry News

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A 50 W, Solid-state C-band Amplifier for Outdoor Use Wavesat Inc. Montreal, Quebec, Canada Satellite communications systems are expanding at an unprecedented rate and service providers require increasing numbers of satellite uplink stations to satisfy their customers’ needs. At the same time, cost control becomes a critical concern when...

An RF Distribution Amplifier Datum Beverly, MA The task of delivering a centralized reference signal to a number of different equipment stations without degrading the signal or creating crosstalk can be difficult, particularly when up to 100 locations require this signal. This situation is encountered in many engineering and...

An OCXO with Rubidium Oscillator Performance MTI-Milliren Technologies Inc. Newburyport, MA Precision crystal oscillators are widely used in systems for navigation, such as Global Positioning System (GPS) and cellular telephone applications. In many ways, the crystal oscillator is the cornerstone in determining critical performance such as bit error rates,...

Design of a Wideband, High Dynamic Range Downconverter Used in Smart Antenna Applications This article details the design of a wideband, high dynamic range downconverter from concept through production. The downconverter is a part of the Smart Adaptive Appliqué (SAA) used in cellular base stations to increase channel utilization...

Effects of Matching on RF Power Amplifier Efficiency and Output Power To date, one of the most important design methods for RF power amplifiers (PA) still consists of matching the large-signal input and load impedances of an active device. These large-signal impedances are supplied by the manufacturer of the...

News From Washington LLLC Receives Two Major Awards Longbow Limited Liability Company (LLLC), a Lockheed Martin/Northrop Grumman joint venture, has received two major awards from the US Army for elements of the Longbow Apache system. The first contract from the Army's Aviation and Missile Command calls for full-rate production...

International Report DE and Sextant Named RWR Supplier for Northrop Grumman Upgrade Package French electronics contractor Dassault Electronique (DE) has announced that its EWS-A radar-warning receiver (RWR) has been selected for use in Northrop Grumman's F-5 combat aircraft upgrade package. DE is teaming with fellow French contractor Sextant Avionique...

Commercial Market New FCC Filings Outline Expanded SPACEWAY System Hughes Communications Inc. has filed two new applications with the Federal Communications Commission (FCC) to enhance its SPACEWAY™ global broadband communications system by increasing overall system capacity and adding higher data rate transport services. The SPACEWAY EXP™ filing proposes high...

The Book End Open Electromagnetic Waveguides T. Rozzi and M. Mongiardo The Institute of Electrical Engineers 387 pages; $95 The dual properties of waveguide transmission and radiation in open structures are the principle features addressed in this book. Guided-wave electromagnetism and the effects of discontinuities in open, hybrid-mode, three-dimensional...

A PC-based High Frequency Electromagnetic Structure Simulator Infolytica Corp. Montreal, Quebec, Canada Three-dimensional (3-D) electromagnetic simulations of high frequency structures have been both time consuming and costly, running lengthy calculations on sophisticated workstations using expensive software. A new, inexpensive software package now allows the operator to simulate and optimize...