Radar Cover (Radome)

Mainly for design reasons, automotive radars are often covered by a so called radome (= radar dome).  A radome can be an emblem on the grille, a bumper or another plastic cover. In all cases, it must be ensured that the cover behaves as transparently as possible for the radar signals and does not cause performance problems for the operation of the radar. 

In particular, the complex design of brand emblems with a three-dimensional appearence with chrome can lead to performance problems in the millimeter wave band. Bumpers are typically painted in vehicle color and thus may be coated with metallic paint which attenuates (reflects) the RF wave. Therefore, to ensure radar reliability, it is essential to characterize the properties of all mateials and investigate the influence on the propagation of radar signals.

We can support in a single step of the R&D cycle or provide a complete solution. Make our experience in material characterization and radome evaluation for automotive radar sensors since 2009 work for you and get in touch with us!

We provide

  • Characterization of materials at automotive frequency bands 24GHz and 77/79GHz (information about required samples can be found here)
    • Determination of complex permittivity (relative permittivity and loss tangent)
    • Any kind of dielectric material (foam, plastic or absorbing material)
    • Coating layers (primer, base coats, clear coating) whith only a few µm thickness
    • Measurement of chrome looking metallisation layers (e.g. PVD, indium)
  • Support in design of radar transparent covers (e.g. Thickness optimization)
  • Full wave simulation
  • Evaluation of prototype and production samples with
    • Imaging reflection measurement (75.7 to 77.7 GHz)
    • Imaging transmission/attenuation measurement (76 to 81 GHz)
    • Broadband transmission measurement (60 to 90 GHz)
  • Studies and development of concepts


We have many years of experience in evaluation of concepts and products, the optimization and evaluation of sensor integration, the development of RF hardware and signal processing algorithms, as well as the execution of simulations and measurements.

We can support in a single step of the R&D cycle or provide a complete solution. Make our experience in measurement, simulation and signal processing for automotive radar sensors since 2009 work for you and get in touch with us!

We provide

  • Radar target evaluation
    • RCS (Radar Cross Section) measurements at 77GHz
    • Identification of scattering centers
    • Measurement of ground reflectivity
    • Modelling of targets
  • Radar sensor evaluation
    • Concept evaluation
    • FMCW signal analysis
    • Measurement with real and simulated targets in an anechoic chamber
  • Full wave simulations
  • RF Hardware design
    (from antenna to complete radar sensor)
  • Radar signal processing and algorithm development
  • Studies and development of concepts

Radar Workshop

Our CEO Dr. Florian Pfeiffer gives you insights about automotive radar technology covering the following topics:

  • Radar as key technology for automotive sensing
  • Basics in radar technology (electromagnetic wave properties and propagation effects)
  • Measurement principles for distance, velocity (Doppler) and direction of arrival (DoA)
  • Automotive sensor performance (24/77/79GHz radar vs. other sensor technologies)
  • Radar signal processing (from raw data to high-level object data)
  • Future trends in automotive radar
  • Design priciples of radar covers (radome) and influrence on the radar performance
  • Relevant material properties (plastic and paint) of radar covers
  • Radar calibration and radome measurement techniques

Contact us for further information.


Besides Radar we also deal with optical LIDAR sensors. Thus, we can provide a full characterization of sensor covers at millimeter and near infrared wavelength.

We provide

  • Reflection measurements
  • Transmission measurements
  • Studies


perisens assists the development and evaluation of wireless communication systems from physical layer (PHY layer) to lower network layer (MAC layer). One of our main foci is the coexistence of automotive wireless systems. With a continuously increasing number of wireless systems in a vehicle (e.g. WiFi for internet applications, Bluetooth for hands-free telephony, Kleer for wireless headphones) it gets more and more important to investigate the systems’ interference and the influence of external signals. Disturbances have to be identified, and suitable countermeasures have to be developed at an early stage. In the investigations we examine influences over the entire transmission path: from degradations at the physical layer (PHY layer) up to effects at the lower network layer (MAC layer).

Make our experience in communication systems since 2009 work for you and get in touch with us!

We provide

  • Channel measurements and models
  • Laboratory and field measurements
  • PHY and MAC layer evaluation
  • Coexistence analysis
  • Studies and development of concepts

RF Engineering

perisens provides consultancy and research and development services in RF, microwave, and millimeter wave technology. We are experienced with projects in the frequencies starting at several megahertz (e.g. 13.56MHz RFID systems) well into the high gigahertz-band (e.g. 77GHz automotive radar). We serve our customers in the development of better products or in the development of methods and technical innovations.

We provide

  • RF simulations
  • RF measurements up to 90GHz
  • Development of RF hardware
  • Studies and development of concepts
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