InterviewSolution
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InterviewSolution
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The induction and radiation fields are equal at a distance of _______(a) λ/4(b) λ/6(c) λ/8(d) λ/2The question was asked in an international level competition.I'm obligated to ask this question of Basics in chapter Antenna Parameters of Antennas |
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Answer» RIGHT answer is (b) λ/6 The explanation is: For an HERTZIAN dipole, EQUATING the magnitudes of maximum induction and radiation fields we GET, \(\mid \overline{E_θ}\mid_{maxRadiation} =\mid \overline{E_θ}\mid_{maxInduction} \) \(\frac{I_m dl}{4\pi\epsilon} (\frac{ω}{v^2r})=\frac{I_mdl}{4\pi\epsilon} (\frac{1}{r^2v})\) \(r=\frac{v}{ω}=\frac{\lambda f}{2\pi f}=\frac{\lambda}{6}.\) |
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