Question

The relation between the dipole spacing and the scaling factor τ  in LPDA is given by _________

(a) \(\frac{S_N}{S_{N+1}} = τ\)

(b) \(\frac{S_N}{S_{N+1}} = \frac{1}{τ} \)

(c) \(\frac{S_N}{S_{N+2}} = τ\)

(d) \(\frac{S_{N+2}}{S_N} = τ\)

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Asked question is from Frequency Independent Antenna topic in portion Frequency Independent Antenna of Antennas

Answer 1

The correct option is (a) \(\frac{S_N}{S_{N+1}} = τ\)

Easiest explanation: The electrical properties of the log periodic antenna are repeated periodically in terms of logarithmic frequency. The relation between the antenna dipole adjacent spacing and the scaling factor is given as \(\frac{S_N}{S_{N+1}} = τ. \)