Question

Which of the following equation holds good for gain transfer method?

(a) Gtest antenna = Gstd antenna) + $10log⁡(\frac{P_{Test}}{P_{Std}})$

(b) Gtest antenna = Gstd antenna) – $10log⁡(\frac{P_{Test}}{P_{Std}})$

(c) Gtest antenna + Gstd antenna) = $10log⁡(\frac{P_{Test}}{P_{Std}})$

(d) Gtest antenna / Gstd antenna) = $10log⁡(\frac{P_{Test}}{P_{Std}})$

The question was asked by my college professor while I was bunking the class.

I need to ask this question from Measurement of Gain topic in chapter Modern Antennas & Antenna Measurements of Antennas

Answer 1

The correct choice is (a) Gtest antenna = Gstd antenna) + $10log⁡(\frac{P_{Test}}{P_{Std}})$

To explain I would say: In gain transfer method the unknown gain antennas are compared with the standard gain antennas. The relation between gains of test and standard antenna to the powers received by them are given by the equation

Gtest antenna = Gstd antenna) + $10log⁡(\frac{P_{Test}}{P_{Std}}).$