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What is the type of polarization is used in ILS systems?(a) Horizontal polarization(b) Vertical polarization(c) Circular polarization(d) No polarizationI have been asked this question during an online interview.This interesting question is from Instrument Landing Systems in section Landing Systems & Air-Traffic Management of Avionics

Answer» CORRECT answer is (a) Horizontal polarization

To explain I would say: Every TRANSMITTER in the ILS including the glide slope transmitter, LOCALIZER and the marker beacons radiate continuous wave, HORIZONTALLY polarized, radio FREQUENCY energy which can be received by the on-board receiver.


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