Most Millimeter wave (mmWave) products don’t run into certification trouble because of a design flaw. They run into trouble because RF exposure requirements weren’t part of the conversation until testing was already underway, turning an easy fix into months of delay.

mmWave technology is helping power the next generation of wireless communications. As more products move into these higher-frequency bands, manufacturers are facing compliance requirements that can reshape a product’s design, testing plan, and timeline. Most of this is manageable if you know what’s coming. Understanding the requirements during the prototype stage, rather than the week before a submission, goes a long way toward keeping a product on schedule.

What Is Millimeter Wave (mmWave) Technology?

mmWave generally refers to radio frequencies between 24 GHz and 300 GHz. These frequencies support the kind of ultra-fast, highly responsive performance that makes them a natural fit for 5G smartphones, fixed wireless access, automotive radar, certain medical devices, and industrial systems.

Because mmWave signals behave so differently from traditional wireless technologies, they often call for their own RF exposure evaluations. Sub-6 GHz devices are evaluated with Specific Absorption Rate (SAR), which looks at energy absorbed within body tissue. mmWave doesn’t penetrate as deeply, so above 6 GHz compliance shifts to Power Density (PD) testing, which is measured at the skin’s surface. That means different lab setups, probes, and simulation tools than a typical SAR evaluation.

Take a 5G smartphone with mmWave support at 28 or 39 GHz, for example. It usually has phased-array antennas near the device edges, close to where a hand or head might rest, so power density gets checked across more angles than a typical SAR test.

Understanding Today’s Compliance Requirements

Requirements vary by market, but a few standards come up again and again:

United States (FCC): Devices must meet FCC equipment authorization requirements, including 47 CFR §1.1310 for RF exposure, which can mean PD testing depending on frequency and antenna configuration.

European Union: Products need to comply with the Radio Equipment Directive (RED) 2014/53/EU and harmonized standards like EN IEC 62311, plus the technical documentation the EU expects before market entry.

Canada (ISED): Devices need to meet applicable ISED RSS requirements and Safety Code 6 for RF exposure, with guidance still evolving under newer RSS-102 updates.

Even though each region has its own framework, the underlying exposure science and testing methodology largely overlap. Measurement setups and evaluation angles are often reusable across FCC, EU, and ISED submissions, so manufacturers can build one core dataset and adapt it per market instead of starting over each time. This is the real advantage of working with a single lab across regions.

Design Factors That Drive Compliance Planning

A lot of what makes mmWave compliance tricky comes down to design choices made before testing starts. A few things worth keeping in mind early:

• Beamforming and beam-steering can meaningfully increase the number of test points required.
• Multiple antenna arrays may need combined evaluations instead of testing each one alone.
• Antenna placement and form factor determine how close the device sits to the body, which shapes which limits apply.
• Designing with multiple markets in mind early can save rework later.

The earlier these questions get asked, the fewer surprises show up once testing begins.

Partnering with the Right Compliance Team

As mmWave technology keeps evolving, so do the regulations around it. Working with an experienced RF exposure lab early, rather than treating testing as a final checkbox, makes it easier to prepare for certification in multiple markets at once.

RF Exposure Lab works alongside device manufacturers, EMC laboratories, certification bodies, and regulatory consultants to support mmWave compliance across a wide range of products. If you’re developing something that uses mmWave technology, reach out to our team to talk through your requirements before certification begins.

Looking Ahead

mmWave technology is only going to play a bigger role in wireless going forward. As the FCC, EU, and Canada keep updating requirements, the manufacturers who bring compliance into the conversation early are the ones who get there with the fewest headaches.