Radar Ready Pigments

Traditional metallic silver paints are particularly critical for radar properties due to their aluminum particles. As a result, these colors are
gradually disappearing from the configurators of car makers. Merck has found a solution to develop silver pigments that are significantly more radar-transparent with the help of our measurement technology (RMS-D-77/79G).

Discover the full story and read the article from the April issue of the European Coating Journal here.

(Feldkirchen, 23rd May 2024)

Our Partner Delon (China) is awarded as excellent supplier

We congratulate our partner and reseller Delon Technologies (Suzhou) Co., Ltd, China for being awarded of excellent Hella Minth supplier in December 2023.

Delon received this award for a project with an RMS-C production cell. With the price Hella Minth thanks Delon for the reduction of the cycle time to less than one third and the outstanding quality of their after-sales service.

Delon is a long-standing partner of perisens in China. In addition to production integration, Delon also offers the possibility of evaluating automotive radomes and materials with perisens measurement technology in its in-house laboratory.

(Feldkirchen, 9th January 2024)


384 – 789 THz (Visible spectrum)
RGB color

Radome Measurement System, perisens
76,56GHz (Automotive radar band)
Reflection linear

Christmas project 2023

Christmas is a time of togetherness and appreciation. We would like to thank you for your trust and support.

Instead of investing in postal items, this year perisens is donating to the clinik clowns ( to bring a smile to sick people, especially children.

We send winter greetings with the snowflake on the left, measured with the new reflection mode for our RMS-D-77/79G.

Find the story behind this Christmas card here.

We wish you a wonderful holiday season with your family and friends and a happy and successful new year!

(Feldkirchen, 14th December 2023)

New Materials for future Mobility NeMMo Congress (Nantes, France)

In cooperation with LyondellBasell we give a presentation about “Influences of the Radar Properties of Automotive Plastic Parts” at the NeMMo congress in Nantes, France.

Tobias Callies (perisens) will talk about penetration of electromagnetic waves through automotive radar covers (= radomes) and our measurement technology to determine the radar relevant electrical material properties. Bruno Viala (LyondellBasell) will present measurement results from their Polypropylene (PP) materials performed with the RMS-D-77/79G, perisens.

Today, automotive radar sensors are mostly installed behind plastic covers. For a radar-transparent design, it is essential to know the material properties permittivity and loss tangent at the radar frequency (76 to 81 GHz).

We are looking forward to an interesting congress and exchange of ideas!

(Feldkirchen, 8th May 2023)

4th Automotive RadarTech 2022 (Suzhou, China)

Our local partner Delon Technologies (Suzhou) Co., Ltd presented our radar measurement technology at the 4th Automotive RadarTech in Suzhou, China.

The Auto Radar Tech provides a platform for OEM, Tier 1, radar solution suppliers, chip suppliers, material suppliers und testing instituions to exprole the future of automotive radar & ADAS technology. Many thanks for the great organization to the team of Delon and the presentation of our RMS and RTS products.

(Feldkirchen, 8th July 2022)

Material Meets Engineering Event from LyondellBasell (Frankfurt, Germany)

Our CEO Dr. Florian Pfeiffer was invited at the Material Meets Engineering Event from LyondellBasell to give a presentation on the penetration of electromagnetic waves through automotive radar covers (= radomes).  The presentation can be downloaded here.

Today, automotive radar sensors are mostly installed behind plastic covers. To design these radar-transparent covers, it is necessary to know the radar properties of the materials. This requires a measurement of the dielectric properties at the radar frequency. At the exhibition, visitors were able to see how easy it is to carry out such measurements with our RMS-D system.

Many thanks for the great organization to the team of LyondellBasell and the interesting discussions with the plastics experts.

(Feldkirchen, 30th June 2022)

Automotive Testing Expo (Stuttgart, Germany)

Meet our specialists at the Automotive Testing Expo in Stuttgart, Germany from 21st to 23rd June 2022 to find out more about latest radar and radome measurement solutions.

You find us in hall 10, booth 1708. We look forward meeting you there!

(Feldkirchen, 1th June 2022)

Christmas card 2021

Our Christmas card for 2021 shows our WiFi Channel State Information (CSI) analysis while the song “Jingle Bells” was being played with a trumpet.

The CSI is available in the received packet preamble of the OFDM (Orthogonal Frequency Division Multiplexing) based WiFi standards such as IEEE 802.11a/n/ac/ax. Typically, the receiver uses it for channel equalization to recover data and then discards it. But the WiFi CSI is very sensitive to the changes in wireless environment and by processing it over time, it is possible to use the WiFi chip as a sensor. This technology is called WiFi Sensing and its typical applications areas are human presence detection, gesture recognition, intrusion detection and contactless vital signal (breathing and heart rate) monitoring. These applications can be implemented on consumer devices and run parallelly with existing connections, without limiting the data transfer.

For our Christmas card, we created IEEE 802.11ax PHY (Physical Layer) baseband waveform using MATLAB. This waveform is then upconverted, transmitted and received over-the-air using Ettus X300 Software-Defined-Radios (SDRs) in 2.4 GHz band. The received signal was converted back to baseband and analyzed in MATLAB. The WiFi CSI amplitude was plotted in a spectrogram. In the spectrogram we can see the effect of finger movements of our colleague while he was playing “Jingle Bells” with a trumpet. Our WiFi CSI analysis framework uses signal processing algorithms and can perform more tasks, such as detecting and counting breathing movements of a person.

As we see on our Christmas card, the WiFi CSI can even track very small movements in the environment. Currently, access to the WiFi CSI is implemented only on small number of devices, which also limits the number of available applications basing on it. This situation is expected to be change with the upcoming WiFi Sensing standard IEEE 802.11bf and WiFi is expected to become a full sensing paradigm and change the way we interact with devices. Once the WiFi CSI becomes available on customer devices, processing it correctly for the target application will gain high importance.

More information about CSI sensing can be found in our publication “In-Vehicle Breathing Rate Monitoring Based on WiFi Signals” from the European Microwave Week (EuMW2020). Download here.


Specification of the Christmas card

  • Measurement system:
    Ettus X300 Software-Defined-Radios and Laptop with MATLAB WLAN Toolbox
  • Center frequency: 2.385 GHz
  • Signal bandwidth: 40 MHz
  • Packet format: IEEE 802.11ax Single User SISO (Single Input Single Output)
  • Antennas: Stub antenna with 3 dBi gain
  • Antenna polarization: Vertical

Here you can find our Christmas cards of the last years.

(Feldkirchen, 13th December 2021)

Probably the most radar visible Christmas decoration in the World

What the candles are for the human eye, the corner reflectors are for the radar sensor. Due to their retroreflective character, corner reflectors are strongly visible for the radar.
Retroreflectivity describes the ability of a target to reflect the radiation back to the direction of the source (radar sensor).

Specification of shown corner reflector:

  • Edge length 60mm
  • Radar Cross Section (RCS) @76.5GHz: 1m²
    (= the average size of a motorcycle)

(Feldkirchen, the 29th Nov. 2021)

The story behind our Logo

Our logo represents a Trihedral Corner Reflector which is often used as a reference target for radar measurements. But it can also be used to make targets more visible for automotive radar sensors. Already small-sized corner reflectors can increase the detection range of small radar targets (such as bicycles or motorcycles) significantly and thus improve the safety of these vulnerable road users.

In this context, we have worked with the Technical University of Munich (TUM) in a research project on dielectric corner reflectors that can be easily and inexpensively integrated into delineators or motorcycles. Learn more.

Specification of shown corner reflector:

  • Edge length 60mm
  • Radar Cross Section (RCS) @76.5GHz: 1m²
    (= the average size of a motorcycle)

(Feldkirchen, 12th July 2021)

Christmas card 2020

We thank our customers and partners for the confidence and the collaboration on the same wavelength.

For 2021 we wish you nothing but the best and many innovative ideas in all frequency ranges. Have a peaceful, relaxing holiday season and a prosperous New Year!

Our this year’s christmas card was measured with our product the Radome Measurement System (RMS-77/79G) equipped with a scanning positioning unit.
It shows a spatially resolved transmission image of a christmas tree sprayed onto a PET foil in amplitude and phase. The tree is sprayed in uni green and the balls in metallic silber.  The 100um thick uni paint gives an additional phase shift of ~6 degree with minimal impact on the attenuation. The metallic paint of only 20um gives a phase shift of 10 degrees and increases the 1way attenuation by 0.7dB. Due to the increasing demands of highly automated driving functions, it is important to investigate the influence of painted surfaces (e.g. bumpers) on automotive radar sensors. The RMS enables materials characterization of automotive paint and measurement of painted radar covers (as bumpers). Here you find more information about the RMS.

Specification of the christmas card:

  • Frequency 76.5GHz
  • Transmission image with 51 x 84 pixel of each 3mm size
  • PET foil with Dk=3.22 and d=350um
  • Uni gree paint with Dk=2.3 and d=100um
  • Metallic silber paint with Dk=31 and d=20um

All electrical properties measured with RMS-77/79G, perisens.

Here you can find our Christmas cards of the last years.

(Feldkirchen, the 04th Dec. 2020)

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.

New Office

In May 2019  we moved to a new office in Feldkirchen b. München (10min from Munich Trade Fair). Our team is growing and the space at our old location was tight. With 400 square meters, the new premises offer us plenty of space for laboratory and office use.

Thanks for everyone’s support through the years!

Here you find our new adress and telephone number.

(Feldkirchen, 20th May 2019)

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