Graphic of a radar screen

Radar Testing

Testing services for various radar applications

Radar in the industry

Radar applications at “unusual” frequencies in the industrial sector or for example at airports are subject to very different regulations – if they exist at all. CETECOM helps the pioneers from the development departments to get the devices approved by means of various analyses and exceptional procedures. The partly very special tests can be carried out directly in our in-house laboratories up to 325 GHz.

Radar in the automotive industry

Schwarzes Auto in einem Messlabor

Radar is used in modern vehicle safety systems in combination with cameras, ultrasound and other sensors. The purpose is to obtain information about the surroundings of a vehicle. There are three main characteristics of automotive radar technology, which differ mainly in the distance of the measuring range:

  • Short range radar (SRR): maximum measuring range ≤ approx. 30 m distance
  • Medium range radar (MRR): maximum measuring range ≤ approx. 150 m distance
  • Long range radar (LRR): maximum measuring range ≤ approx. 250 m distance

With advances in autonomous driving, the number of radar sensors needed in a vehicle for redundancy and accuracy reasons is increasing, including blind spot radar sensors, stop-and-go functionality, automatic speed control and lane assistance systems. These applications use different frequency ranges:

 

Frequency range Use cases (examples) Classification
24,05 GHz – 24.25 GHz* Distance warning MRR
Blind-spot detection, lane change assistance, rear cross traffic alert, precrash rear, exit assistance MRR
24,25 GHz – 26,65 GHz (UWB)** Stop-and-Go system SRR
Blind-spot detection, lane change assistance, rear cross traffic alert, precrash rear, exit assistance SRR
76 GHz – 77 GHz Adaptive cruise control LRR
Front cross traffic alert MRR
Blind-spot detection, lane change assistance, rear cross traffic alert, precrash rear, exit assistance MRR
77 GHz – 81 GHz Not fully regulated yet.

 

* Almost completely homogenized.
** Expires 2022.

Regulation

For most countries, the regulation is divided into the two frequency bands 76-77 GHz and 77-81 GHz:

  • For 76 – 77 GHz the technical requirements for acceptance are basically homogeneous.
  • For 77 – 81 GHz, many countries have not yet defined a regulation.

Exception: In 2017, the FCC has homogenized the frequency regulation for both bands and is therefore one step ahead of many countries.

High frequencies - high regulation?

A relatively recent trend is the use of very high frequencies, which are significantly higher than those used in cars. New industrial systems may require radars, some of which operate well above 100 GHz (e.g. for improved measurement of material properties during production, more precise detection of geometric shapes or in safety engineering). These frequency ranges have often been regarded as “useless” in the past – and that’s why in many countries there are not even regulations allowing or even regulating the use of these frequencies in detail.

Our services

In our accredited laboratories we offer test services for radar technologies. According to the mentioned specifications we test among others the following contents:

  • Operating frequency range / occupied bandwidth
  • average power
  • Top performance
  • 3-D antenna pattern (radar beam analysis)
  • Undesirable emissions in the out-of-band sector
  • Undesirable emissions caused by harmonics
  • Unwanted transmissions caused by recipients
  • Interference immunity of receiver / receiver blocking
  • Frequency stability

Our test reports are recognized worldwide and can be used for market approval in Europe, the USA, Canada and Japan. CETECOM’s service portfolio even exceeds the above mentioned country requirements: The test services in our ISO-17025 accredited laboratories include regulatory radar testing for a variety of international certification systems based on different test specifications and standards.

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