Radomes and Bumpers

Automotive radome and bumper testing

Ensuring the quality of radomes and bumpers

Automotive radars are usually mounted behind bumpers or radomes. When selecting the materials, care must be taken to ensure good signal penetrability in the desired frequency band. The use of lower quality radomes can impair signals to such an extent that angular errors, distortions and strong signal attenuation occur.

The R&S®QAR offers the ideal way to quickly and reliably filter out lower quality bumpers and radomes in production. It furthermore features the possibility of producing spatially resolved mmWave images of the reflectivity and transmittivity of the radome material to detect inhomogeneities within the material.

The R&S®ZVA network analyzer is used to determine the relative permittivity of radome material.

Benefits of our solutions

  • Fewer failures of customer functions thanks to the higher, consistent quality of the radomes used
  • Spatially resolved analysis of transmission and reflection values within seconds

Related videos for Automotive radome testing

Explainer video: Explore the benefits of the R&S®QAR50

Because cellular V2X enables safety-critical functions, its correct operation must be ensured in demanding environments. Watch this video.


Measuring with the R&S®QAR50

Learn more about the QAR50's measurement capabilities and unique features within this 5 minute video.


The QAR principle explained in a minute

This video demonstrates the ease of radome and bumper analysis using the R&S QAR.


Measuring reflection parameters with the QAR-K50

Get more technical insights into the QAR-K50 Software and see how accurate the reflection results correlate with vector network analyzer measurements


The QAR-K50 at a glance

Watch our 3 minute tour highlighting the differences between QAR-K10 an QAR-K50 measurement software.


Part 1: R&S®QAR Measurement Preparation

A brief overview on measurement preparation for radome testing with the R&S®QAR.


Part 2: R&S®QAR Normalization

How to normalize the R&S®QAR - trasmission loss and reflection


Part 3: R&S®QAR Verification

How to verify your measurement results with the R&S®QAR


Part 4: R&S®QAR Actual Measurement

How to perform actual measurement with the R&S®QAR.


Part 5: R&S®QAR Interpretation of Reflection Measurement

R&S®QAR - How to interpret reflection measurement results.


Part 6: R&S®QAR Interpretation Transmission Measurement

R&S®QAR - a closer look on your captured data.


Products for Automotive radome testing


Cost-effective automotive radome testing. Fast. Precise.

The R&S®QAR50 is the ideal tool for accurately testing the quality of automotive radomes and bumpers at the end-of-line (EOL). It features sufficient space to easily accommodate bulky bumpers combined with spatially resolved measurements to evaluate the homogeneity of design emblems.

Product information

QAR product teaser - K50 software

K50 software

Using the new K50 Software, spatially-resolved reflection parameters of radomes can be accurately and non-destructively captured with the QAR millimeter-wave imaging system. The values are highly precise and are directly comparable to those captured using far more complex setups; for example a vector network analyzer with waveguide adapters.

Product information

Related products

R&S®QAR50 radome tester

R&S®QAR50 radome tester

Key facts

  • RF transmission loss and reflection measurement in the automotive radar bands (76-81 GHz)
  • Extremely short cycle time ensures high throughput in production
  • High resolution reflection image enables more optical-like analysis
  • VNA-like accuracy with high resolution imaging and spatially-resolved phase capability

Product information


R&S®QAR quality automotive radome tester

Key facts

  • High accuracy and performance for radome development
  • Supports 77 GHz and 79 GHz radar bands
  • Intuitive operation and result interpretation
  • Radar-independent quality test with no need for a golden device

Product information

R&S®ZVA110 Vector Network Analyzer

R&S®ZVA vector network analyzers

Key facts

  • High performance vector network analyzer series
  • System frequency range: 10 MHz to 110 GHz
  • Dynamic range up to 130 dB (typ)
  • Two test ports, 1.0 mm male

Product information

Related resources for Automotive radome testing

Testing radomes and bumpers
App card: Testing radomes and bumpers in all phases – from design to high-volume production

The varying material properties of radomes and bumpers can massively influence signal quality. Rohde & Schwarz focus on a new approach: a test system that can be integrated in all test phases of each radome and bumper to ensure reliable and robust performance of the overall ADAS.

More information

Webinar: Ensuring automotive radome & bumper quality from design to high-volume production

Webinar: Ensuring automotive radome & bumper quality from design to high-volume production

Learn about how microwave imaging technology can be utilized to provide accurate, 2-dimentional characterisation of radome and bumper quality, accelerate the design cycle and facilitate seamless transition from development in the lab to high-volume production.

More information


White paper: Fundamentals of radome and bumper measurements using the R&S®QAR

Due to design challenges, radar sensors are usually hidden behind bumpers or emblems, which can influence how well the radar sensor can interpret the outgoing and incoming data. To test radome and bumper influence on radar sensors, this white paper examines how the R&S®QAR quality automotive radome tester can help.

Register now and download our free white paper.

More information

Perfect vision for autonomous vehicles - article published in Kunststoffe International

Perfect vision for autonomous vehicles

Read more about straightforward analysis and characterization of plastic materials for radar systems in the automotive industry. The magazine by Carl Hanser Verlag is a trend-setting information carrier for the increasingly global performing plastics processors.

Download now

Download QAR Flyer

Flyer: Excellence in radome and bumper measurement

Every customer has different system and service requirements. In order to serve the diverse needs during R&D and production processes, various service levels are available for the QAR. Learn more in our flyer "Excellence in radome and bumper measurement".

Download now

Download AppCard

App card: Quality automotive radome tester analyzes your radar integration

  • Radar-independent test without the need for a radar device
  • Spatially resolved reflectivity measurement of design radomes
  • Detailed spectral measurement of radome transmission loss
  • Fully remote controllable for highly automated measurements

Download now

Positioning ADAS radar sensors

App card: Determining the mounting position of automotive radar sensors

The exact mounting position is highly relevant to the performance and secure function of any radar sensor.

More information

Testing ther radar sensor integration

App card: Testing the radar sensor integration

Quality automotive radome tester analyzes your radar integration by measuring, visualizing and analyzing your radar radomes.

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RF characteristics of bumper material

App card: RF characteristics of bumper material

Testing bumper material for installation of automotive radar sensors is crucial for its performance.

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Transmission measurement

Material under test with engraved R&S logo (logo is 600 µm thicker than the rest)

Material under test with engraved R&S logo (logo is 600 µm thicker than the rest)

DUT with inhomogeneous distribution (left) and proper (homogenous) distribution (right)

DUT with inhomogeneous distribution (left) and proper (homogenous) distribution (right)

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