Changes

The frequency band accessible for radar applications strongly depend on the type of application for emitter, transmitter , and receiver set-ups. A generalized answer or even warranty for the successful license of a radar sensor cannot be given at this place. Therefore we encourage our customers to contact their certification body in an early stage of the design phase!

However, a the first introduction on frequency band regulation as it applies to radar sensor sensors shall be given at this place.

Detailed information on radio frequency allocation are is given by several standardization bodies which publish tables and overview documents for the region of their responsibility. Here the International Telecommunication Union (ITU) addresses three regions of countries in Europe, America , and Asia which are summarized in the following chart: https://www.itu.int/en/ITU-R/terrestrial/broadcast/PublishingImages/bcd%20images/ITU%20regions.jpgLocal differences between individual countries need to be taken into consideration too - again standardization remains an ongoing challenge. Nevertheless , there is a tendency for harmonization of frequency allocations.

The scope of the sensor application strongly determines which regulation of operation frequency applies. The frequency regulation distinguishes among others between application purposes such as for amateur, non-specific SRD, radiolocation, level probing radar (LPR) , and tank level probing radar (TLPR). For SRD it is often attractive to deploy frequencies of the Industrial, Scientific , and Medical (ISM) frequency bands which are centred centered around 24.15 GHz, 61.25 GHz, 122.65 GHz , and 245.00 GHz. A complete overview of bandwidth details on page https://siliconradar.com/wiki/ISM_Bands. In frequency tables of national and international regulators , details about ISM frequency are often summarized in the annex under ammendment amendments No. 1.138 and 1.150.

For applications such as tank level probing radar (TLPR) more relaxed frequency restrictions apply. But, as soon as the sensor application also covers open reservoirs and basins these limits narrow again (LPR). In such an application landscape the design of adaptive sensor solutions prove proves to be advantageous. Finally , it should be mentioned, that well-shielded test labs and devices for R&D investigations may provide further frequency options.

The frequency map is subdivided in into three world regions which are displayed e.g. in https://www.itu.int/en/ITU-R/terrestrial/broadcast/PublishingImages/bcd%20images/ITU%20regions.jpg

A graphical summary on frequency assigment assignment for the three world regions has been summarized as a white paper and is available as down load a download here [registration for download required]: https://www.rohde-schwarz.com/de/loesungen/test-and-measurement/aerospace-defense/radarmesstechnik-messtechnik-fuer-elektronische-operationsfuehrung/spectrum-allocation-poster-radar_250982.html

Some webpages offer an overview to frequency allocation tables of specific countries, world-wideworldwide

For the European area , the European Conference of Postal and Telecommunications Administrations (CEPT) publishes an overview on regulations concerning the radio frequencies here http://www.ok2kkw.com/00003016/ctu/ercrep025.pdf

More selective an information system for the ITU-Region 1 provides details for the country and frequency range of interest in a web -based inquiry system under https://www.efis.dk/view/compare-applications.do

Russia provides these this information as a table at following places - http://docs.cntd.ru/document/561295589 and https://cdnimg.rg.ru/pril/63/38/06/1049-34_ch2.pdf and as frequency map here - https://4ham.ru/wp-content/uploads/2020/02/tabl_chastot_rf.jpg

The USA - The summary for the American market is published, among others, in the frequency table of US authority FCC in the ONLINE TABLE OF FREQUENCY ALLOCATIONS open to the public under

A web platform to access information on selected countries of Asia and beyond (ITU-Region 3) is available here - http://www.aptafis.org/ . Furthermore , a table with the status and the outlook of frequency allocations for short -range devices is summarized in a table under http://www.aptafis.org/matrixviewer.jsp?annex=17

Peoples Republic of China provide provides an overview subdevided subdivided into sections for Mainland China, Hongkong, Macao, and ITU Region 3 as a reference here: http://www.srrc.org.cn/kindeditor/attached/file/20190704/20190704100047_2979.pdf .

In parallel for the Taiwanese area , an english English edition is distributed here - https://www.ncc.gov.tw/english/files/07060/92_070605_1.pdf

Singapure Singapore has published its frequency regulation in tables https://www.imda.gov.sg/-/media/imda/files/regulation-licensing-and-consultations/frameworks-and-policies/spectrum-management-and-coordination/spectrummgmthb.pdf?la=en and as chart under https://www.imda.gov.sg/-/media/imda/files/regulation-licensing-and-consultations/frameworks-and-policies/spectrum-management-and-coordination/spectrumchart.pdf?la=en

Furthermore , countries publish their regulation plan for frequency allocation separately hereafter

https://www.rsm.govt.nz/about/publications/pibs/pib-21 . Another overview (2016) is available here https://gazette.govt.nz/notice/id/2016-go2007 .

Due to the low attenuation and dramatic distances , a deployment of RF devices in space applications requires special care in order to keep the accumulated radiation load at minimum.

Earth-Satellite: Some information on frequencies used between Satellites and Earth Surface is described in https://www.itu.int/en/ITU-R/space/snl/Documents/ITU-Space_reg.pdf , for the well-known broadcaster frequencies cf. page 10.

Orbit: Satellite communication is a topic of ongoing discussion, currently fostered by the expansion of non-geostationary satellites satellite systems in MEGA constellations. Information and discussion of satellite communication frequencies are coordinated by ITU's Space Services Department (SSD), cf. https://www.itu.int/en/ITU-R/space/Pages/default.aspx . The activities are described in a number of presentations of the ITU such as in the slide show under https://www.nesdis.noaa.gov/CRSRA/pdf/ITU_SPECTRUM_REGULATION.pdf . Already applied frequencies can found using the request pages such as https://www.itu.int/snl/freqtab_snl.html .