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The transmission mode polarization vector and receiving mode polarization vector of antenna polarization are ___________

(a) always equal

(b) conjugate to each other

(c) negative of conjugate of other

(d) inverse of Conjugate of other vector

I have been asked this question in an interview for internship.

This is a very interesting question from Types of Polarization topic in chapter Radiation, Baluns & Polarization of Antennas

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Correct answer is (b) conjugate to each other

To explain: The antenna polarization is defined by the polarization vector it transmits. In a common coordinate system, the transmission mode polarization vector is the conjugate of its receiving mode polarization vector.

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