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Which of the following is true for the circular polarization?

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Which of the following is true for the circular polarization?

(a) Ex=Ey, and ∅=π/2

(b) Ex≠Ey, and ∅=π/2

(c) Ex≠Ey, and ∅=π/4

(d) Ex=Ey, and ∅=π/4

I got this question in semester exam.

My query is from Types of Polarization topic in division Radiation, Baluns & Polarization of Antennas

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Right option is (a) Ex=Ey, and ∅=π/2

The best explanation: The locus traced by the extremity of the time-varying field vector at a fixed observational point is called polarization. Circular polarization has electric field components are perpendicular to each other and have equal magnitude. Ex=Ey, and ∅=π/2.

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