isotropic radiator वाक्य
उदाहरण वाक्य
मोबाइल
- That ratio would be equal to G if the reference antenna were an isotropic radiator.
- It radiates uniformly in all directions from a point source sometimes called an isotropic radiator.
- "Incoherent " isotropic radiators are possible and do not violate Maxwell's equations.
- In ideal free space, the electric field strength produced by a transmitter with isotropic radiator is readily calculated.
- Acoustic isotropic radiators are possible because sound waves in a gas or liquid are longitudinal waves and not transverse waves.
- The reference antenna is usually the theoretical perfect isotropic radiator, which radiates uniformly in all directions and hence has a directivity of 1.
- For non-isotropic radiators such as parabolic antennas, headlights, and lasers, the effective origin is located far behind the beam aperture.
- "' Isotropic "': An isotropic antenna ( isotropic radiator ) is a " hypothetical " antenna that radiates equal signal power in all directions.
- In common usage " omnidirectional " usually refers to all horizontal directions, typically with reduced performance in the direction of the sky or the ground ( a truly isotropic radiator is not even possible ).
- It measures the power density the antenna radiates in the direction of its strongest emission, versus the power density radiated by an ideal isotropic radiator ( which emits uniformly in all directions ) radiating the same total power.
- Therefore, anywhere along the side-lobe direction from this transmitter, a blind receiver could not tell the difference if the Yagi-Uda was replaced with an isotropic radiator with antenna input power increased by 1.57 dB.
- Where G _ t and G _ r are the antenna gains ( with respect to an isotropic radiator ) of the transmitting and receiving antennas respectively, \ lambda is the wavelength, and R is the distance between the antennas.
- In reality, a " continuous vector field tangent to the surface of a sphere must fall to zero at one or more points on the sphere, which is inconsistent with the assumption of an isotropic radiator with linear polarization.
- Due to reciprocity, these two effects are equal-an antenna that makes a transmitted signal 100 times stronger ( compared to an isotropic radiator ), will also capture 100 times as much energy as the isotropic antenna when used as a receiving antenna.
- Higher gain rating ( dBi ) indicates further deviation ( generally toward the horizontal ) from a theoretical, perfect isotropic radiator, and therefore the further the antenna can project a usable signal, as compared to a similar output power on a more isotropic antenna.
- Therefore, anywhere along the side-lobe direction from this transmitter, a blind receiver could not tell the difference if a Yagi-Uda was replaced with either an ideal dipole ( oriented towards the receiver ) or an isotropic radiator with antenna input power increased by 1.57 dB.
- Therefore, an antenna with a peak power gain of 5 would be said to have a gain of 7 dBi . " dBi " is used rather than just " dB " to emphasize that this is the gain according to the basic definition, in which the antenna is compared to an isotropic radiator.
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