Related Questions

A source has a cosine power pattern that is bidirectional. Given that the directivity of a unidirectional source with cosine power pattern has a directivity of 4, then the directivity of the unidirectional source is:
A rectangular horn antenna has an aperture area of 3λ × 2λ. If the aperture efficiency of an antenna is 90%, then the directivity of the antenna is:
A rectangular horn antenna has an aperture area of 3λ × 2λ. Then the maximum directivity that can be achieved by this rectangular horn antenna is:
As the beam area of an antenna decreases, the directivity of the antenna:
If an antenna has a directivity of 16 and radiation efficiency of 0.9, then the gain of the antenna is:
If the beam width of an antenna in two orthogonal planes are 300 and 600. Then the directivity of the antenna is:
Gain of an antenna is always greater than the directivity of the antenna.
If an antenna radiates over half a sphere, directivity of the antenna is:
If the directivity of a square corner receiving antenna is 20 and operating at a wavelength of 0.25m, the effective aperture of a square corner antenna is:
For aperture antenna to be efficient and have high directivity, its area should be ____________