In which of the following region in LPDA, the current leads the base voltage?(a) Inactive transmission line region(b) Active region(c) Inactive stop region(d) Reflective regionI had been asked this question in an interview for internship.Enquiry is from Frequency Independent Antenna in section Frequency Independent Antenna of Antennas

In which of the following region in LPDA, the current leads the base v

1.	In which of the following region in LPDA, the current leads the base voltage?(a) Inactive transmission line region(b) Active region(c) Inactive stop region(d) Reflective regionI had been asked this question in an interview for internship.Enquiry is from Frequency Independent Antenna in section Frequency Independent Antenna of Antennas
Answer» The correct choice is (a) Inactive transmission LINE region For explanation: In LPDA, the length of dipole \(L < \frac{λ}{2}\)COMES under inactive transmission region. These region dipoles offer capacitive impedance. So the current leads the base voltage in the inactive transmission line region. Active region \(L=\frac{λ}{2} \)offers Resistive Impedance and Inactive stop region \(L > \frac{λ}{2} \)offers INDUCTIVE impedance.

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