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Antenna Systems for Polarization Diversity During the last couple of years, antennas for mobile networks have sprouted up like gladioli all over our downtown areas. For aesthetic reasons and due to the fact that it has become more expensive to acquire the rights to install antennas on buildings and...

SiGe MMICs and Flip-chip MICs for Low Cost Microwave Systems Recent progress in SiGe device technology has improved cutoff frequencies of these devices to beyond 200 GHz. Such high speed transistors fabricated on low cost Si substrates allow high levels of integration as well as the development of low...

Major Advances in Phased Arrays: Fast One This article is the first of a two-part series that describes the major accomplishments in phased arrays, and new-age MMIC ground-based and airborne arrays. Significant advances have been made in the last 35 years in the area of electronically steerable phase-phase scanned...

Components Parametric Bandpass Filters These parametric bandpass filters are designed for local multipoint distribution system wireless applications. The filters feature constant delay, high selectivity, small size and low cost, and can be used to transmit and receive data at rapid rates in limited bandwidth channels. The filters utilize a...

AROUND THE CIRCUIT Industry News Electronic device automation software developer Ansoft Corp., Pittsburgh, PA, has acquired the privately held RF/microwave circuit design tool provider Compact Software Inc. Under terms of the $10 M deal, Ansoft will exchange a combination of approximately 1.3 million shares of common stock and $3...

Around the Circuit Industry News Microwave transmission system module provider REMEC Inc. , San Diego, CA, has completed its merger with microwave component manufacturer Radian Technology Inc. Jim Mongillo, CEO of Radian, will become a VP at REMEC and will continue in his current position at Radian. Radian shareholders...

New Literature Relay Catalog This 112-page catalog describes the company's relays designed for commercial and industrial applications. Technical notes, a relay selection guide and a contact selector chart are provided. Features and general data are listed for over 40 relay types. American Zettler Inc., Aliso Viejo, CA (714) 831-5000....

News From Washington Tier II Global Hawk Rolled Out in San Diego The Tier II Global Hawk, the newest Department of Defense (DoD) unmanned aerial vehicle (UAV), was introduced at the end of February at Teledyne Ryan Aeronautical (TRA) in San Diego. The UAV is a high altitude, all-weather...

International Report Philips Launches New PC Monitor Video-control IC Netherlands contractor Philips Semiconductors has launched its model TDA4885 video-control IC in an attempt to meet the digital control and on-screen display requirements of the latest-generation 15- and 17-inch computer monitors. The IC was developed to enhance the design flexibility...

The Commercial Market CTIA Releases Year-end Wireless Statistics The Cellular Telephone Industry Association's (CTIA) year-end, semi-annual survey of the US mobile communications market indicates that 17 percent of the US population now uses wireless phones. The survey reports that 1996 saw the net addition of more than 10,250,000 phone...