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Questions about the lessons and tools, corrections and ideas for the project are welcome.

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Share a correction, an unclear explanation, or a result that seemed unexpected on this page.

For a correction, include the relevant page and section, what seemed unclear, and any calculation inputs or expected result. A short example or reference helps make the feedback easier to follow.

Email RF Journey support@rfjourney.com

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Contribute to RF Journey

Technical review, practical experience and new ideas can help improve the lessons and tools. Contributions can take many forms, from refining an explanation to sharing a practical example or developing a new tool.

  • Review

    Check an explanation, calculation, model assumption or reference.

  • Share

    Suggest a practical example, measurement or design insight.

  • Build

    Help develop a lesson, interactive model or engineering tool.

A first message with the topic, the idea and any relevant experience is enough to start a conversation.

Discuss a contribution Contribution terms

Contributions are reviewed before publication. Scope, rights, any payment and credit are agreed in writing before substantial work. Please don’t send confidential employer or client material.

Supervised exams

Arrange a one-hour RF Fundamentals exam, supervised by Ricardo Pereira. Certification requires at least 18 correct answers out of 20 and explicit supervisor confirmation.

The exam takes place in a verified RF Journey account. Include preferred dates, times and a time zone when requesting a session.

Request an exam Certification requirements

The format, permitted resources and any fee are agreed before booking. A request does not reserve a time.