An antenna is a device

The parabolic communication antenna has a focus at 2 m distance from the vertex of the antenna. Find the width of the antenna 3 m from the vertex.

The parabolic communication antenna has a focus at 3m distance from the vertex of the antenna. Find the width of the antenna 8m from the vertex.

Assertion: A dish antenna is highly directional. Reasion: This is because a dipole antenna omnidirectional.

If both the length of an antenna and the wavelength of the signal to be transmitted are doubled, the power radiated by the antenna

Assertion: A dish antenna is highly directional. Reasion: This is because a dipole antenna omnidirectional.

If both the length of an antenna and the wavelength of the signal to be transmitted are doubled, the power radiated by the antenna

If both the length of an antenna and the wavelength of the signal to be transmitted are doubled, the power radiated by the antenna