A receiving antenna does "re-radiate" some of the power it receives, but not all. Some of the power it receives proceeds into the receiver ... which is the only way we detect the signal being received by the antenna.
The isotropicantenna by definition has a radiation pattern that is a perfect sphere. The omni driectional antenna is characterized by a radiation pattern resembling a doughnut.
RF stands for Radio Frequency, magnetic waves radiate out of the transmitting antenna and are picked up or recovered by the receiving antenna at the receiver.
The underlying electromagnetic radiation mechanism is illustrated by evaluating the scattered radiated field and its effects on the aperture efficiency by considering the theoretical limits of a radiating conical horn with infinite length
For wireless communication systems, the antenna is one of the most critical components. A good design of the antenna can relax system requirements and improve overall system performance. An antenna is the system component that is designed to radiate or receive electromagnetic waves. In other words, the antenna is the electromagnetic transducer which is used to convert, in the transmitting mode, guided waves within a transmission line to radiated free-space waves or to convert, in the receiving mode, free-space waves to guided waves.
An antenna is a completely 'passive' device. It can't radiate more power than youput into it. But if you know what direction you want it to favor, you can design theantenna to take the power away from directions you don't need, and concentrate itin the direction you want.Antenna gain means the strength of the antenna in its best direction, comparedto a theoretical ideal antenna that's exactly equally good in all directions (known asan "isotropic" antenna).
Her face seemed to radiate kindness. Spokes radiate from an axle.
The sun will radiate.
Does the pain in your elbow radiate to your hand(?)
Here points radiate out from the central idea or concept.
Yes planets do radiate noise. But not all of them do
An incandescent light will radiate at all frequencies.