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Which of the following are present in an ESA?(a) Gimbals(b) Electronic motors(c) Phase shifter(d) PotentiometerI got this question in unit test.My question is taken from Electronic Scanned Array Radar topic in section Surveillance Systems, Mapping and Multimode Radars of Avionics

Answer»

Right answer is (c) PHASE shifter

Explanation: The ESA has no mechanical moving parts, such as antenna gimbals, POTENTIOMETERS, rotary joints, or hydraulic/electronic motors. It USES phase SHIFTERS to ELECTRONICALLY steer the beam.



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