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What is the impedance of 2- element slot antenna with single slot antenna resistance =500Ω?(a) 125Ω(b) 500Ω(c) 1000Ω(d) 250ΩThis question was addressed to me in a job interview.This interesting question is from Types in section Slot & Microstrip Antenna of Antennas

Answer»

The correct CHOICE is (a) 125Ω

The explanation: IMPEDANCE of N-element slot antenna \(Z_{in,N} = \frac{Z_{slot}}{N^2} \)

GIVEN N=2, Now \(Z_{in,N} = \frac{Z_{slot}}{N^2} = \frac{500}{4} = 125\Omega\)


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