Published by Rogers Corporation
Advanced Electronics Solutions

As vehicles become increasingly intelligent, the focus of innovation is shifting from what happens outside the car to what happens inside. A major leap forward is underway in in-cabin radar technology—a sensing approach that uses millimeter wave radar to protect passengers, enhance safety systems, and enable new user experiences.

At Rogers, we support this transformation by providing the high performance materials enabling the next generation of compact, precise, and reliable in-cabin radar systems, reinforcing our long standing role in powering safety critical technologies worldwide.

In-cabin radar technology sensing passengers in a car

Why In-Cabin Radar? A New Era of Occupant Monitoring

Modern vehicles now integrate sophisticated occupant monitoring systems (OMS) to understand who is in the car and what their condition is. Radar has emerged as a crucial technology thanks to its ability to detect extremely subtle movements—including micro motions caused by breathing and heartbeats.

Key functions enabled by in-cabin radar include:

  • Child Presence Detection (CPD)
  • Respiration and micro motion monitoring
  • Passenger presence for airbag suppression
  • Head and body position monitoring
  • First and second row occupancy sensing

Unlike cameras, radar works reliably in darkness, through fabrics, and without privacy concerns, making it ideal for safety critical applications.

Global Safety Standards Are Accelerating Adoption

Regulatory momentum worldwide is driving rapid investment in in-cabin sensing:

Euro NCAP (Europe)

  • CPD systems can earn up to 5 safety points beginning in 2026.
  • Only direct sensing technologies—like radar—meet the new criteria for detecting infants, including in footwells and rear seats.

China NCAP

  • Adds CPD and driver monitoring requirements starting 2024.
  • Future regulations for connected vehicles may mandate in-cabin monitoring by 2030.

United States

  • While federal CPD legislation is still pending, safety agencies continue pushing for voluntary adoption to prevent heat stroke tragedies.

As global programs tighten requirements, automakers are increasingly turning to radar to deliver reliable, direct life sign detection.

Two Technology Paths: Patch Antenna vs. AOP

In-cabin radar systems primarily use one of two antenna architectures:

Patch Antenna

  • Higher detection accuracy
  • Preferred for advanced CPD and multi seat monitoring

Antenna on Package (AOP)

  • Compact and cost efficient
  • Suitable for basic presence sensing in earlier generation systems

As performance expectations increase, especially for CPD, OEMs are turning toward patch antenna designs, where dielectric stability and low loss materials become essential.


Where Rogers Creates Impact

High frequency radar performance is directly influenced by the PCB materials supporting the antenna and RF circuitry. Rogers materials deliver:

  • Low loss performance at 60 GHz
  • Tight dielectric control for accurate beamforming
  • Thermal stability in demanding environments

With advanced materials such as RO4830™ Plus, engineers can optimize RF performance, manufacturability, and long term reliability for next generation occupant monitoring systems.


Rogers: Supporting the Next Generation of In-Cabin Radar

From materials innovation to close collaboration with PCB fabricators, Tier 1 suppliers, and OEMs, Rogers is committed to enabling the advancement of in-cabin radar technologies that contribute to safer, smarter vehicle interiors.

If you’re working on CPD systems or other occupant monitoring applications, our specialists are ready to support your material and design challenges. Rogers’ materials now power more than 500 million radar sensors worldwide—advancing automotive safety at a global scale.


Contact Us

Contact a Rogers Sales Engineer to learn more and discuss your application.

Tags:
Automotive & EV/HEV

Published on Mar 30, 2026

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Advanced Electronics Solutions

RF solutions laminates, 3D printable materials, prepregs/bondplys, busbars, metallized ceramic substrates and cooling solutions solve design issues such as signal integrity, Radio Frequency (RF) signal management, power efficiency, power distribution and thermal management.