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An antenna has a gain of 10 dB and is used to transmit a signal at a frequency of 1 GHz. What is the power density of the signal at a distance of 100 m from the antenna?

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Problem 1: What is the wavelength of a radio wave with a frequency of 100 MHz? An antenna has a gain of 10 dB

where λ is the wavelength, c is the speed of light (approximately 3 x 10^8 m/s), and f is the frequency. P_t is the transmitted power

Electromagnetic Waves and Radiating Systems Solution Manual G is the antenna gain

where S is the power density, P_t is the transmitted power, G is the antenna gain, and r is the distance from the antenna.

The wavelength of a radio wave can be calculated using the formula: