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What is a Balun?(a) It is used to balance the unbalanced systems(b) It unbalances the balanced systems(c) A twisted wire(d) Main beam of antenna with large beam widthI had been asked this question in an interview for job.Question is from Baluns in chapter Radiation, Baluns & Polarization of Antennas

Answer»

Correct choice is (a) It is used to BALANCE the unbalanced systems

For explanation I would say: A Balun is a device which CONNECTS a BALANCED two –CONDUCTOR LINE to an unbalanced coaxial line. It eliminates field mismatch. The current distribution is present in the inner conductor and is zero at the outer conductor.



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