ETSI - EN 303 347-2
Meteorological Radars; Harmonised Standard for access to radio spectrum; Part 2: Meteorological Radar Sensor operating in the frequency band 5 250 MHz to 5 850 MHz (C band)
|Publication Date:||1 June 2021|
The present document specifies technical characteristics and methods of measurements for C band meteorological radar systems intended for the surveillance and classification of hydrometeors with the following characteristics:
• Operating in the following frequency range:
- 5 250 MHz to 5 850 MHz.
• Utilizing unmodulated pulses or phase/frequency modulated pulses also known as pulse compression.
• The maximum output power (PEP) does not exceed 1 MW (i.e. 90 dBm).
• The transceiver antenna connection and its feeding RF line use a hollow metallic rectangular waveguide.
• The antenna rotates and can be changed in elevation.
• The used waveguide is WR187/WG12 waveguide according to IEC 60153-2 [i.2] with a minimum length between the output of the transmitter and the input of the antenna of 1 902 mm (20 times the wavelength of the waveguide cut-off frequency).
• The antenna feed is waveguide based and the antenna is passive.
• The orientation of the transmitted field from the antenna can be vertical or horizontal polarized or it can be both simultaneously.
• At the transceiver output an RF circulator is used.
NOTE 1: Since at the transceiver output an RF circulator is used, it is assumed that the transceiver characteristics remain independent from the antenna.
NOTE 2: According to provision 5.452 of the ITU Radio Regulations [i.7], ground-based radars used for meteorological purposes in the band 5 600 MHz to 5 650 MHz are authorized to operate on a basis of equality with stations of the maritime radio navigation service.
NOTE 3: Further technical and operational characteristics of meteorological radar systems can be found in Recommendation ITU-R M.1849-1 [i.3].
NOTE 4: The relationship between the present document and essential requirements of article 3.2 of Directive 2014/53/EU [i.1] is given in Annex A.