EVS-EN 303 347-3 V2.1.1:2021

The present document specifies technical characteristics and methods of measurements for X-band meteorological radar systems intended for the surveillance and classification of hydrometeors with the following characteristics:
• Operating in the following frequency range:
- 9 300 MHz to 9 500 MHz
• Utilizing unmodulated pulses or phase/frequency modulated pulses also known as pulse compression.
• The maximum output power (PEP) is not greater than 250 kW (i.e. 84 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 WR90/WG16 waveguide according to IEC 60153-2.
• 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 orientated 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 5.475B of the ITU Radio Regulations, ground-based radars used for meteorological purposes in the band 9 300 MHz to 9 500 MHz have priority over other radiolocation uses.
NOTE 3: Further technical and operational characteristics of meteorological radar systems can be found in Recommendation ITU-R M.1849-1.
NOTE 4: The relationship between the present document and essential requirements of article 3.2 of Directive 2014/53/EU is given in Annex A.