Design Flow - Measurement Aided Development

Measurement-aided Doherty amplifier design - chapter 4

Doherty amplifier design flow chart
Doherty amplifier design flow chart

Properly understanding any engineering concept, before embarkation on the design is imperative. Doherty is no different. Where possible, it is highly advisable to build simulation environments to correlate with the design, at least to understand trends and sensitivities. Design confidence and insight is, in the case of Doherty, now augmented by measurement.

The starting point for this measurement phase is a dual-input Doherty DUT – comprising two input ports, input and output matching networks, active devices, bias networks, and the Doherty combiner.Whether developing a high power discrete device based Doherty, or an integrated circuit (RFIC) version, the proposed design flow may still be beneficially applied. In both cases, a conventional, fixed RF input split architecture may be laid out.

To do so provides a reference, a benchmark, against which the dual-input derived variants may be compared.

Ask the expert

Gareth Lloyd

Gareth Lloyd

Gareth Lloyd graduated from the University of Leeds in 1994 with a degree in Electronic & Electrical Engineering. Gareth has worked in various engineering and management roles, in different industries, for major companies including Ericsson, Huawei, ZTE, TriQuint and Andrew Corporation. Gareth joined Rohde & Schwarz in 2015, as a Senior Expert. His primary work focus is performance differentiated radio front-ends (RFFE).

Ask Gareth

Related chapters

Request information

Do you have questions or need additional information? Simply fill out this form and we will get right back to you.

Marketing permission

I want to receive information from Rohde & Schwarz via

What does this mean in detail?

I agree that Rohde & Schwarz GmbH & Co. KG and the Rohde & Schwarz entity or subsidiary company mentioned in the imprint of this website, may contact me via the chosen channel (email or postal mail) for marketing and advertising purposes (e.g. information on special offers and discount promotions) related to, but not limited to, products and solutions in the fields of test and measurement, secure communications, monitoring and network testing, broadcast and media, and cybersecurity.

Your rights

This declaration of consent may be withdrawn at any time by sending an email with the subject "Unsubscribe" to Additionally, a link to unsubscribe from future email advertisements is contained in each email sent. Further details on the use of personal data and the withdrawal procedure are set out in the Statement of Privacy.

Your request has been sent successfully. We will contact you shortly.
An error is occurred, please try it again later.