Question

Ina directional antenna emine luna effective isotropic power (isotropic power effective radiation) of 1.1 kw when

A food in sustenance ane with in 90 W and its radiation resistance is 74 ohms resonance. The measured current in the antenna is 1.008 A. Calculators
a) The efficiency of the antenna.

Answer 1

To calculate the efficiency of the antenna, we need to find the input power and output power of the antenna. Given the measured current in the antenna and the output power, we can calculate the efficiency using the appropriate formula.

Step-by-step explanation:

To calculate the efficiency of the antenna, we need to find the input power and output power of the antenna. The input power can be calculated using the formula:

Input Power = Current * Voltage

Given that the measured current in the antenna is 1.008 A, we can find the input power. The output power is given as 90 W. To calculate the efficiency, we use the formula:

Efficiency = (Output Power / Input Power) * 100

By substituting the given values into the formula, we can find the efficiency of the antenna.