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What statements about the beamwidth of an RF antenna are true?

What statements about the beamwidth of an RF antenna are true? (Choose two)

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A.
The lower the gain of an antenna, the more narrow one or both beamwidths become.

B.
The beamwidth patterns on an antenna polar chart indicate the point at which the RF signal
stops propagating.

C.
Horizontal and vertical beamwidth are calculated at the points in which the main lobe decreases
power by 3 dB.

D.
Horizontal beamwidth is displayed (in degrees) on the antenna’s Azimuth Chart.

E.
Antenna beamwidth is measured in units of decibels relative to an isotropic radiator (dBi).

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