An antenna is a device that focuses RF energy into specific radiation patterns. The gain of an antenna represents which type of power measurement?This type of question contains radio buttons and checkboxes for selection of options. Use Tab for navigation and Enter or space to select the option.optionADirectoptionBRelativeoptionCDifferentialoptionDAbsolute

Which unit represents the gain of an antenna?This type of question contains radio buttons and checkboxes for selection of options. Use Tab for navigation and Enter or space to select the option.optionAdBdoptionBdBioptionCdBmoptionDdB

Powered amplifiers provide an increase in signal strength by using ____________ gain.This type of question contains radio buttons and checkboxes for selection of options. Use Tab for navigation and Enter or space to select the option.optionApositiveoptionBmaximumoptionCactiveoptionDpassive

IEEE 802.11 WLANs use which of the following for RF communication?This type of question contains radio buttons and checkboxes for selection of options. Use Tab for navigation and Enter or space to select the option.optionALow power, narrow bandwidth optionBHigh power, wide bandwidth optionCLow power, wide bandwidth optionDHigh power, narrow bandwidth

A radiated power of 5 W is produced by a resonant antenna. Its directional radiation intensity represented by: U = B0cos3θ (W/unit solid angle)    0 ≤ θ ≤ π/2;  0 ≤ ϕ ≤ 2πFind the(a)    maximum power density (in W/m2) at a distance of 1500m (assuming far field distance).(b)    Directivity of the antenna (dimensionless and in dB)(c)    Gain of the antenna with an efficiency of 85% (dimensionless and in dB)

Question 19 :When an RF signal passes between media of different densities and may change speeds and bend, the behavior is known as:This type of question contains radio buttons and checkboxes for selection of options. Use Tab for navigation and Enter or space to select the option.optionAdiffraction.optionBscattering.optionCreflection.optionDrefraction.