Amplifiers

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When the terms of a military contract required drop-in replacements for an obsolete RF transmitter-amplifier Amplifier Technology reverse engineered the 25 year old technology and developed a 21st Century version that the customer could use with its existing battlefield radios.

Teseq has expanded its broadband amplifier line to include a Class A linear and low distortion model that operates from 10 kHz to 400 MHz with a rated power level of 260 W.

QuinStar Technologies Inc. of Torrance, CA announces the release of the QAI family of Instrumentation Amplifiersin the millimeter wave frequency range based on the most advanced device and circuit integration technology.These amplifiers can be designed to operate over a wide band or over relatively narrow band with an exceptionally high power level. Our customers have used them for applications as diverse as plasma diagnostic, medical research, communication and remote sensing.

Recently released ultra-broadband amplifier offering low noise figures, good gain flatness, and output power. Model MSH-6492401 operates on 1.0-10 GHz with 28dB gain, noise figure of 2.5dB, +20.0 Min Pout (1dBm), VSWR 2.0:1, and DC Power +12.0V / 300mA. The bandwidth makes this amplifier useful for many applications including ECM instrumentation and test sets. 

Teseq USA & Sweden Service Centres are now fully trained MILMEGA Global Support Networks.

An impressive list of speakers on microwave power amplifier technology has been assembled for the April ARMMS RF & Microwave Conference.

Nujira Ltd. has released the details of significant test results that demonstrate how Envelope Tracking (ET) technology unlocks the potential of RF CMOS PAs for high end 3G and 4G smartphone applications.

Nujira Ltd. has released its new Woodstock 16-band Multi-Mode, Multi-Band (MMMB) Envelope Tracking (ET) reference design for 4G smartphone RF front ends.

Following the completion of a £700,000 funding round to expand its overseas sales and device characterization capabilities, Mesuro has announced the enhanced services and capabilities it is now able to offer its customers

AR RF/Microwave Instrumentation has introduced a new family of solid-state RF amplifiers that instantaneously covers the 10 kHz to 400 MHz frequency range with both 200 and 400 W models. The amplifiers are designed to deliver all the power required for applications using MIL-STD, DO 160, and other automotive standards. These models can be used independently or with AR's RF conducted immunity generators when specific tests require higher powers than our standard CI Systems can generate.

As more companies take advantage of the benefits of wireless technology, output device manufacturers must depend on highly linear, quality test equipment to meet those demands. Wireless communications encompass a number of applications.

Mobile network operating costs are driving the requirement for increased infrastructure efficiency, particularly in the final stage RF power amplifier. The venerable Chireix outphasing architecture proposed in 1936 by Henry Chireix has been updated with Gallium Nitride HEMT transistors operating in class E, and shown to deliver class leading efficiency.

Doherty combiner product line covers major communication bands ranging from 700 MHz to 2700 MHz. Each model is optimized for the center frequency of targeted frequency band. However, as new spectrum is being released, the pre‐designed standard models can be tuned in customer applications to meet performance. This document provides guidelines to tune these standard models for off‐band applications.

Engineers who test mobile power amplifiers and front end modules are looking for ways to reduce test cost through maximizing throughput while ensuring that the devices meet required performance levels. This application note discusses these complex issues and recommended solutions using the Agilent PXI M9381A Vector Signal Generator as an example.