RF & Microwave Industry News

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Surface-mount Coaxial Connectors In today’s fast-paced environment of high density electronic equipment, surface-mount connectors are becoming an important part of the integration process. Most RF components are assembled onto surface-mount PCBs or into hybrid modules. The RF connector interface has been one of the more difficult areas to reduce...

A CMOS Fractional-N PLL IC at Microwave Frequencies Peregrine Semiconductor Corp. San Diego, CA Designers of modern microwave terminal systems are faced with a global competitive market that is leading to a greater emphasis on power efficiency, size and cost. Component vendors must respond to these needs with not...

An IC Characterization and Analysis Program Update Version 5.0 of the HP Integrated Circuit Characterization and Analysis Program (IC-CAP) has been developed and is available currently. This update to the popular device modeling program features a new statistics module to help process engineers and circuit designers improve yields and...

Low Noise Cellular Receiver Amplifiers Low noise and high dynamic range are the keys to success for cellular base station receiver front-end amplifiers. Lower noise means slightly longer range and high dynamic range translates to less intermodulation interference from strong adjacent-channel signals. Three new low noise receiver amplifiers have...

The Application of Low Noise, X-band Synthesizers to QAM Digital Radios Mark R. Simpson and John M. Dixon VertiCom Inc. Santa Rosa, CA For high data rate, 16-to-64-quadrature amplitude modulation (QAM) designs, the vast majority of wireless point-to-point and point-to-multipoint radio manufacturers currently are using fixed-frequency, mechanically adjustable dielectric...

New Microstrip Bandpass Filter Topologies Marinus (Ron) Korber, Jr. Watkins-Johnson Co. Microwave miniature receivers require numerous microstrip filters for such functions as picket selection, preselection in the case of a receiver front end, and suppression of mixer spurious products and doubler fundamental frequency feedthrough. The sheer quantity of filters...

Optimized Performance from Coaxial Feeder Cables and Connectors for Wireless Systems Hugh R. Nudd Andrew Corp. Orland Park, IL Modern multichannel wireless communication systems, such as cellular telephone systems, require high grade feeder cables for the connections between tower-mounted antennas and the radio equipment, which is typically located in...

A Low Cost, Open-architecture-based System for Portable Satellite Telemetry and Control A comprehensive examination of the market demands for cost-reduced satellite telemetry and control stations is presented. These systems are implemented using flexible, open-architecture-based, high performance real-time systems. The trend for combining telemetry monitoring of satellite data with closed-loop...

RFIC Receiver Technology for Digital Mobile Phones Chris O’Connor TriQuint Semiconductor Hillsboro, OR The Cellular Telephone Industry Association (CTIA) reported recently that 17 percent of the US population now uses wireless telephones. Amazingly, more than 44 million subscribers were on record as of December 31, 1996, with new subscribers...

COMPONENTS   Switchable Filter Module The model FA4489 switchable filter module is capable of selecting one of nine channels with a TTL control signal. The device is used typically as a front-end preselector in a high dynamic range receiver. The module offers a proprietary switching matrix, low intermodulation distortion...