RF & Microwave Industry News

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PRODUCT FEATURE An Ultraminiature Switch Connector for Testing Wireless Equipment Murata Electronics North America Smyrna, GA E mbedding test points in today's miniature RF circuit boards has traditionally been a problem because of the amount of PCB space required and the intrusive effects to the circuit's performance. The benefits...

PRODUCT FEATURE A Novel Design Approach for an RF VNA Agilent Technologies Santa Rosa, CA T he vector network analyzer (VNA), the core instrument for RF and microwave device characterization, has kept pace with designers' needs over the years for speed, accuracy and ease of use. Today, VNAs from...

PRODUCT FEATURE Ultraminiature Coaxial Connectors for SMT Applications RF Interconnect Products Radiall Inc. Stratford, CT T he ever-increasing demand for miniaturization in microwave communications systems and equipment continues to require components that are both smaller and less costly. One of the determinants of size has traditionally been interconnect devices....

PRODUCT FEATURE A Flyaway Tri-band SATCOM SSPA Advantech, Advanced Microwave Technologies Inc. Dorval, Quebec, Canada T he first tri-band solid-state power amplifier (SSPA) for use in earth terminals with X-band military satellites and C- and Ku-band commercial satellites has been developed. The amplifier is designed to operate in any...

TECHNICAL FEATURE A Broadband 2 to 18 GHz Cascaded Reactively Terminated Single-stage Distributed Amplifier This article presents a novel design technique and measured performance for a broadband (2 to 18 GHz) amplifier using a cascaded reactively terminated single-stage distributed amplifier (CRTSSDA) configuration. The amplifier employs double heterojunction pseudomorphic high...

TECHNICAL FEATURE Limitations in Feed-forward Linearization: Part II This article analyzes the effects of main path amplifier distortion characteristics on feed-forward systems. Part 1 ( Microwave Journal , August 2000) described the basic operation of a feed-forward amplifier system and the impact of nonideal effects on the ability of...

TECHNICAL FEATURE Effects of RF-circuit Nonlinear Distortion on Digitally Modulated Signals in Wireless Communications Computer simulation and measurement of the error vector magnitude (EVM) and adjacent-channel power ratio (ACPR) of a 2.4 GHz MMIC power amplifier (PA) and a 2.4 GHz transceiver RF front end for digital wireless communications...

TECHNICAL FEATURE Applying Switched Gain Stage Concepts to Improve Efficiency and Linearity for Mobile CDMA Power Amplification Efficiency and linearity of the power amplifier contained in second-generation (2G) CDMA cellular mobile radios are critical parameters. Further system application of power control where the mobile unit transmits output power levels...

TECHNICAL FEATURE Liquid Sensing at Radio Frequencies Combining RF measurements of complex impedance and a database of measurements can produce a sensing system to detect, identify and quantify changes to liquids and other materials in near real time. Thomas J. Warnagiris Southwest Research Institute San Antonio, TX C omplex...

TECHNICAL FEATURE Stabilization of RF Parameters of Injection-locked Pulsed IMPATT Oscillators The methods for RF parameter stabilization of injection-locked pulsed impact avalanche and transit time (IMPATT) oscillators during a pulse width over the locking band in a wide range of ambient temperatures are described. A combination of current compensation...