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Don’t miss this one-day online Power Amplifier Design Forum featuring industry leaders covering key design topics for RF design engineers. Sponsored by Cadence.
Filtronic plc announced the launch of a range of tower top amplifier (TTA) systems designed for use in two-way radio networks, particularly for public safety systems such as P25.
Modelithics and Mini-Circuits have developed 14 new, high-accuracy substrate amplifier simulation models for packaged Mini-Circuits amplifiers. Modelithics now offers more than 68 models for more than 130 individual Mini-Circuits components, including amplifiers, filters and splitters.
For LNAs with exceptionally low noise temperatures — on the order of just 1 or 2 K — the measurement of noise performance is difficult and subject to systematic errors from noise source uncertainties. NoiseTech Microwave offers a line of solid-state impedance generators with cryogenic capabilities, supporting a cold noise parameter measurement approach. The impedance generator presents four signal source impedances at the input to the device under test, enabling noise parameters to be deterministically extracted.
TMD Technologies Limited will be attending the International Particle Accelerator Conference (IPAC) in Vancouver to highlight its potential in providing cutting edge products for mainstream science.
Toshiba Electronics Europe announced the development of TaRF10, a next generation TarfSOI CMOS process optimized for low-noise amplifiers in smartphone applications.
ETL Systems will be showcasing its new advanced technologies in RF distribution at Convergence India 2017, which is taking place on February 8 to 10 in New Delhi.
Low noise amplifiers (LNAs) play a key role in radio receiver performance. The success of a receiver's design is measured in multiple dimensions: receiver sensitivity, selectivity, and proclivity to reception errors. The RF design engineer works to optimize receiver front-end performance with a special focus on the first active device. This paper considers device- and board-level variables that affect LNA performance and confront the engineer at each level of design in accommodating the various requirements of specific applications.
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 preâdesigned standard models can be tuned in customer applications to
meet performance.
This document provides guidelines to tune these standard models for offâband 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.
The mismatch between these real loads and the amplifier's output impedance result in a percentage of the forward power being reflected back to the amplifier. In some cases, excessive reflected power can damage an amplifier and precautions that may affect forward power are required. This Application note highlights the major RF amplifier characteristics that impact forward power as well as net power allowing the use of Ohm's law, even when conditions are far from ideal.
The published specifications for leakage current in RF power devices are often a source of concern and confusion for engineers and technicians. This paper examines the real meaning behind the leakage current specifications and offers guidance on properly testing a device for leakage current.
RFMD has developed 400W pulsed output power GaN
HEMT amplifiers operating over 2.9GHz to 3.5GHz band
or 17% bandwidth. Under pulsed RF drive with 10% duty
cycle and 100us pulse width, the amplifier delivers
output power in the range of 401W to 446W over the
band, with drain efficiency of 48% to 55% when biased at
drain voltage of 65V.
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