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Clean Sky

Requirements

Antenna requirements have been defined

    1. Antenna Size

      Antenna Size Table
  1. Antenna Weight

    • Antenna : 20 - 30 lbs (9.07 – 13.61 kg)
    • Antenna + Tilting Mechanism: 30 - 45 lbs (13.61 – 20.41 kg)
  2. Architecture Requirement

    ATAR (Alternate-Transmit Alternate-Receive)
    ATAR (Alternate-Transmit Alternate-Receive)
  3. Antenna Band

    The equipment should be designed to operate at a center frequency anywhere within the band of 9300 to 9500 MHz corresponding to a 2.12% bandwidth. Instantaneous bandwidth of 20 MHz is required. The operational frequency changes typically at each radial (typical frequency of 120Hz), potentially at each pulse (typical frequency of 3kHz).
  4. Antenna Return Loss

    RL < -17.7 dB
  5. Antenna Power Handling

    The antenna should be capable of handling input signals with a peak power up to:
    Antenna Power Handling
  6. Antenna Polarization

    The antenna should be dual linearly polarized.
  7. Antenna SLL

    Antenna SLL
  8. Antenna Beam Width

    Antenna gain and beam width varies with design, frequency, and size. The value reported in the next table have been calculated with approximate formulas and should be considered as guidelines for the antenna design.
    Antenna Beam Width
  9. Antenna Directivity

    Antenna Directivity
  10. Antenna Losses

    Antenna Losses
  11. Antenna Beam Scanning

    The antenna beam should be oriented at boresight.
  12. Additional Beam Symmetry Requirement

    The beam pattern of the antenna shall be the same for both polarizations within the following tolerances:
    Antenna Beam Symmetry
  13. Antenna Polarization Purity

    The antenna polarization purity (Cross/Co ration) shall be equal to:
    Antenna Polarization Purity
    As the weather target is a volumetric one, the ratio Cross/Co is calculated as the ratio between mean value on the 3dB antenna beam.
    H&V channels isolation shall be at least equal to Cross/Co ratio:
    Antenna H-V