The dual input doherty

Measurement aided Doherty amplifier

Learn how to get the maximum performance from your design

Doherty amplifier development

Doherty amplifier architecture enables RF PA designers to maximize efficiency, power, bandwidth and yield without compromising linearizability.

Whether it is for 5G, SatCom or any other application demanding high performance and reproducibility, the challenges remain the same: how can you be sure that you are getting the maximum possible performance from the design and how can you evaluate its sensitivities and variations for series production?

Running a test campaign while changing the drive signals in the two doherty paths enables complete amplifier design characterization. The R&S®SMW200A vector signal generator outputs two signals whose relative linear (amplitude and phase) or non-linear (e.g. shaped) characteristics are varied with precision.

The R&S®FSW signal and spectrum analyzer not only returns scalar quantities such as spectral regrowth and EVM, but also AM/AM and AM/PM, gain and peak envelope power (using the R&S®FSW-K18 option).

See more information, as follows, on getting deep insights in your design!

Further information

Application guide: Measurement-aided Doherty amplifier design

Targeting those responsible for Doherty Amplifier development, this document summarizes some of the technical challenges, limitations, implementations, and introduces a design methodology that enables maximized cost-performance to be achieved.

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White paper: Making effective use of Doherty architecture

5G technology evolution drives the demand for efficient power amplifier implementations to achieve high-density setups. Imagine you could get 60 % more output power, 50 % more bandwith and up to 20 % efficiency gain per amplifier in a MIMO antenna array setup?

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App card: Optimize Doherty power amplifiers

Speed up development, verify best performance and start up series production with confidence. Get deep insight into your Doherty amplifier design with a dual-path, precisely synchronized source driving the Doherty amplifier and improve your yield.

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Webinar: The dual input Doherty

Overcome design challenges such as optimum signal alignment, and PA class, by driving with linear and non-linear input signals. Measurements on a state-of-the-art GaN Doherty Amplifier, enabled by unique signal generation and analysis solutions, illustrate the approach.

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Webinar: Doherty amplifier - measurement-aided development

Register and watch the webinar from January 2020: Doherty amplifiers - measurement-aided development with Gareth Lloyd, Senior Application Development Engineer, Rohde & Schwarz.

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Related products

R&S®SMW200A vector signal generator

The R&S®SMW200A is the perfect tool for generating high-quality, complex, digitally modulated signals. The R&S®SMW is one of a broad portfolio of signal generators offering wide frequency ranges.

Product information

R&S®FSW signal and spectrum analyzer

The high-performance R&S®FSW signal and spectrum analyzer was developed to meet demanding customer requirements. Offering low phase noise, wide analysis bandwidth and straightforward and intuitive operation, the analyzer makes measurements fast and easy.

Product information