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E9B08

How can the approximate beam-width in a given plane of a directional antenna be determined?

SelectAnswer
ADraw two imaginary lines through the ends of the elements and measure the angle between the lines
BMeasure the ratio of the signal strengths of the radiated power lobes from the front and side of the antenna
CMeasure the ratio of the signal strengths of the radiated power lobes from the front and rear of the antenna
DNote the two points where the signal strength of the antenna is 3 dB less than maximum and compute the angular difference