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Industry News

CANbus-controlled Switch Matrices

A series of electromechanical switch matrices developed based on the Controller Area Network
September 1, 2000
PRODUCT FEATURE CANbus-controlled Switch Matrices Dow-Key Microwave Corp. Ventura, CA C oaxial electromechanical switch matrices are common in complex test equipment used in testing multiport devices and subsystems. Electronic control of conventional switch matrices is based on standard interface buses, such as RS-232, RS-422 and the general-purpose interface bus...
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Low Power Delay Filters for MCPA Applications

This month's cover features a multicarrier power amplifier
September 1, 2000
COVER FEATURE Low Power Delay Filters for MCPA Applications K&L Microwave Inc. Salisbury, MD M ulticarrier power amplifiers (MCPA) and their importance to wide modulation have received extensive coverage in recent literature. 1 The demand for faster data rates has given a boost to the MCPA industry and magnified...
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An Ultraminiature Switch Connector for Testing Wireless Equipment

An ultraminiature switch connector that provides miniature, low cost test points in compact RF PCBs with little or no effect on circuit performance
September 1, 2000
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...
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A Novel Design Approach for an RF VNA

Vector network analyzers that set new benchmarks in measurement speed and noise performance
September 1, 2000
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...
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Ultraminiature Coaxial Connectors for SMT Applications

A new generation of surface-mount technology (SMT) coaxial connectors that further miniature interconnects and provide cost savings
September 1, 2000
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....
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A Flyaway Tri-band SATCOM SSPA

The first tri-band solid-state power amplifiers (SSPA) for use in earth terminals with X-band military satellites and C- and Ku-band commercial satellites
September 1, 2000
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...
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A Broadband 2 to 18 GHz Cascaded Reactively Terminated Single-stage Distributed Amplifier

A novel design technique and measured performance for a broadband amplifier using a cascaded reactively terminated single-stage distributed amplifier configuration
September 1, 2000
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...
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Limitations in Feed-forward Linearization: Part II

The effects of main path amplifier distortion characteristics on feed-forward systems
September 1, 2000
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...
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Effects of RF-circuit Nonlinear Distortion on Digitally Modulated Signals in Wireless Communications

Computer simulation and measurement of the error vector magnitude and adjacent-channel power ratio of a 2.4 GHz MMIC power amplifier and a 2.4 GHz transceiver RF front end for digital wireless communications
September 1, 2000
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...
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Applying Switched Gain Stage Concepts to Improve Efficiency and Linearity for Mobile CDMA Power Amplification

Improvements obtained using a switched gain stage power amplifier where the second stage is bypassed at lower output power levels
September 1, 2000
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...
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