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RF Amplifier Output Voltage, Current, Power, and Impedance Relationship

June 13, 2012
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.

Measurement of Group Delay

June 4, 2012
This application note discusses the Measurement of Group Delay and Amplitude response of RF and Microwave components and assemblies, including frequency converters, using the 6840 series Microwave System Analyzer with the Group Delay option from Aeroflex.

Leverage Circuit Envelope Simulation to Improve

June 1, 2012
Optimizing a PA design for one parameter invariably requires sacrifi cing the performance of another. This delicate balance between performance and effi ciency is not the only conundrum, because designers of 4G PAs must also contend with demands for greater instantaneous bandwidth. As a result, designers of next-generation PAs are relying on simulation more than ever before, and their tasks include frequency domain simulation, time domain simulation, and now circuit envelope simulation.

LO Harmonic Effects on TRF3705 Sideband Suppression

May 14, 2012
The LO harmonic effects on I/Q errors and sideband suppression (SBS) in the RF modulator was analyzed in application report SLWA059. This application report further investigated LO harmonic effects when attempting to achieve an increased level of SBS performance.

Statistical Analysis of Modern Communication Signals

May 14, 2012
The introduction of this digital transmission technology has made it necessary to deal with peak power levels up to 20 dB above the average value. All of the RF power components must be capable of handling these high voltage peaks to avoid break down, or flash over.

Selecting Ferrite Circulators for Radar Applications

May 14, 2012
Radar markets continue to forecast positive growth, and Skyworks Solutions offers a range of products designed specifically for these expanding markets, including materials for phase shifter applications and ferrite circulators.

Redefining RF and Microwave Instrumentation

May 14, 2012
National Instruments has redefined the traditional approach by combining PXI hardware and NI LabVIEW system design software, leveraging commercial technologies such as multicore microprocessors, user-programmable FPGAs, PCI Express hardware, and system design software to meet the flexibility and scalability demand for future high-frequency test and measurement applications.

How to Measure 5-nanosecond Rise/Fall Time in Pulsed Power Amplifiers

April 6, 2012
Rise/fall time is one of the key measurement parameters when designing, manufacturing or maintaining pulsed radar power amplifier systems, especially for wideband pulse power amplifiers. Learn how to achieve 5 nanosecond rise/fall time RF pulse measurement with the 8990B peak power analyzer by reading this application note. This article also includes tips on how to consistently obtain accurate rise/fall time measurement results.

The Advantages of Outsourcing Your RF/Microwave Assembly to an Onshore Contractor

April 6, 2012
Shifting landscapes suggest RF/Microwave companies keep manufacturing closer to home. The outsourcing decision for RF/Microwave (RF/MW) companies, however, has a unique set of circumstances when compared to conventional digital electronics.

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