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In which frequency band does an ILS GP transmit?
  • A
    EHF
  • B
    VHF
  • C
    UHF
  • D
    SHF

Refer to figure.
Glide path transmission takes place in the UHF band on 40 spot frequencies from 329.15 to 335 MHz. UHF is used to produce more accurate and narrow beams. The transmission is beamed in the vertical plane in two lobes similar to the localiser transmission. The upper lobe has a 90 Hz modulation, while the lower lobe has a 150 Hz modulation.

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