How bad will the sale of the spectrum down to 24.25 GHz be for weather radar?

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SUMMARY

The sale of spectrum down to 24.25 GHz poses significant implications for weather radar systems, which operate between 23.6 to 24.0 GHz. The FCC's licensing of this band for 5G communications could interfere with weather forecasting capabilities. Automotive radar, specifically the narrow band from 24.05 GHz to 24.25 GHz, serves as a buffer between weather applications and 5G. Continuous advancements in MMIC technology for radar chips indicate that while concerns exist, they are manageable within the constraints of assigned frequency bands.

PREREQUISITES
  • Understanding of FCC regulations regarding frequency allocation
  • Knowledge of automotive radar systems, particularly at 24 GHz
  • Familiarity with weather radar technology and its frequency requirements
  • Insight into MMIC technology and its applications in radar systems
NEXT STEPS
  • Research the impact of 5G communications on weather forecasting accuracy
  • Explore advancements in automotive radar technology at 77 GHz
  • Investigate the implications of frequency interference on public safety
  • Learn about the regulatory processes governing spectrum allocation by the FCC
USEFUL FOR

Weather scientists, automotive engineers, regulatory professionals, and anyone involved in the development or oversight of radar technologies and telecommunications.

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Interesting. This band is also shared with car radar. Automotive narrow band (NB) is 24.05 GHz to 24.25GHz.

According to this Texas Instrument article:
https://e2e.ti.com/blogs_/b/behind_...tive-radar-systems-moving-from-24ghz-to-77ghz
There is also an "Ultra Wide Band" (UWB) from 21.65GHz to 26.65GHz, that is also currently in use - but which is to be phased out by 2022.

From the article you have cited, Weather radar is 23.6 to 24.0GHz, and the FCC is licensing 24.25 to 25.25 for 5G communications.

So it looks like Automotive Narrow band is providing a buffer between the Weather applications and 5G.

By the way, I work for Veoneer - a manufacturer or automotive radar sensors. Though I have always worked on development of the newer 77GHz sensors.

I am only slightly concerned. MMIC technology (radar chips) is steadily improving. Automotive radar and 5G manufacturers must stay within their assign frequency bands. And this is a manageable engineering problem.

Devices which violate their FCC license would be subject to recall.
 
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