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What is the Input impedance of the axial feed helical antenna with circumference per unit wavelength is 1.2?(a) 168Ω(b) 186Ω(c) 198Ω(d) 158ΩI have been asked this question in examination.I need to ask this question from Frequency Independent Antenna in division Frequency Independent Antenna of Antennas |
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Answer» CORRECT OPTION is (a) 168Ω The explanation: Input impedance of HELICAL antenna with axial FEED is given by \(Z=140 \FRAC{C}{λ}\) \(Z=140 \frac{C}{λ}=140×1.2=168\Omega\) |
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