A.The polarization of the antenna refers to the direction of the magnetic field strength formed by the antenna radiation.

B.The antenna radiates electromagnetic waves to the surrounding space, and the direction of the electric field changes according to a certain law.

C.If the electric field of the electric wave is perpendicular to the ground, we call it a vertically polarized wave.

D.If the transmitting antenna is circularly polarized, the receiving antenna must also be circularly polarized, and both polarization directions must be the same

A.TRUE

B.FALSE

A.client

B.certifier

C.eSight server

D.authentication server

A.3

B.11

C.1

D.6

A.10%-15%

B.100%

C.50%

D.No need to overlap