[permalink] [id link]
The far-fields propagate without ability for the transmitter to affect them, and this causes them to be independent in the sense that their existence and their energy, after they have left the transmitter, is completely independent of both transmitter and receiver.
from
Wikipedia
Some Related Sentences
far-fields and for
In general, the purpose of antennas is to communicate wirelessly for long distances using far-fields, and this is their main region of operation ( however, certain antennas specialized for near-field communication do exist ).
far-fields and be
Because of these nuances, special care must be taken when comprehending the literature about near-fields and far-fields.
far-fields and is
The radiation zone is important because far-fields in general fall off in amplitude by 1 / r.
propagate and without
Otherwise, these fields do not “ propagate ,” freely out into space, carrying their energy away without distance-limit, but rather oscillate back and forth, returning their energy to the transmitter if it is not received by a receiver.
Developments in mail systems, such as Microsoft Outlook, without sufficient thought for security implications, made viruses that indeed propagate themselves via email possible.
In that work, Gibbs showed that those processes could be accounted for by Maxwell's equations without any special assumptions about the microscopic structure of matter or about the nature of the medium in which electromagnetic waves were supposed to propagate ( the so-called luminiferous aether ).
* Distributed file serving, e. g., FTP or WWW servers could be mirrored in a remote location without needing to propagate files that are never accessed.
proposed a method that can generate a longitudinal electromagnetic ( light ) wave in free space, and this wave can propagate without divergence for a few wavelengths.
In contrast to passive spread of electric potentials ( electrotonic potential ), action potentials are generated anew along excitable stretches of membrane and propagate without decay.
At first, waves propagate through the atmosphere without appreciable change in mean velocity.
FRI jets are known to be decelerating in the regions in which their radio emission is brightest, and so it seems that the FRI / FRII transition reflects whether a jet / beam can propagate through the host galaxy without being decelerated to sub-relativistic speeds by interaction with the intergalactic medium.
Since sine waves propagate without changing form in distributed linear systems, they are often used to analyze wave propagation.
This means that electrons can propagate without scattering through a crystalline material, almost like free particles, and that electrical resistance in a crystalline conductor only results from imperfections and finite size which break the periodicity and induce interaction with phonons.
The virus introduced its own code to the compilation of new Delphi programs, allowing it to infect and propagate to many systems, without the knowledge of the software programmer.
Other areas of controversy include the transfer of copyright from author to publisher, because many authors want to propagate their ideas more widely and re-use their material elsewhere without the need for permission.
An error may act in the same way as a fault in that it can create further error conditions, therefore an error may propagate multiple times within a system boundary without causing an observable failure.
The phase speed is identical to that of coastal Kelvin waves, indicating that the equatorial Kelvin waves propagate toward the east without dispersion ( as if the earth were a non-rotating planet ).
Both processes, receptor binding and membrane fusion, are catalyzed by the glycoprotein G which plays a critical role in pathogenesis ( mutant virus without G proteins cannot propagate ).
They tried to avoid suspicion by not preaching to the commoners without permission from the local rulers to propagate Catholicism within their domains.
In 1920, Venerable Zhuan Dao built the temple as a place of practice to propagate the Dharma and to provide lodging for monks, as there were many Buddhist monks who came to Singapore without lodging.
Pliny says that the stone is found in the nests of eagles, who cannot propagate without them.
* Speed-the algorithm can be implemented in a combinatorial manner ( without hardware registers ), allowing the wavefront to propagate across much or all of the matrix in one or a few clock periods.
Even though the plants propagate without human intervention the realities of modern agriculture mean there is always human intervention in the growth of plants and thus farming is a method of " use " of plant genes.
Oscillations mix these states, and the mass eigenstates are the states which propagate without mixing, i. e., the eigenvectors of H.
propagate and ability
However, at the base of this crack is a round void called an ampulla which would have functioned to distribute force over a larger surface area, hindering the ability of the " crack " formed by the serration to propagate through the tooth.
* Fitness ( biology ), an individual's ability to propagate its genes
In genetic algorithms, inheritance is the ability of modelled objects to mate, mutate and propagate their problem solving genes to the next generation, in order to produce an evolved solution to a particular problem.
The changes in our abilities to handle calcium will ultimately influence neuronal firing and the ability to propagate action potentials, which in turn would affect the ability of the brain to alter its structure or function ( i. e. its plastic nature ).
Sonar systems operate much like radar, except that the medium is liquid or air, and the electro-magnetic spectrum of the signal is either audio or ultra-sonic — and like radar, lower frequencies propagate relatively higher energies longer distances with lesser resolving ability, higher frequencies which damp out faster are used for increased resolution of nearby objects.
Buddhist temples and monasteries were either destroyed or taken over for use in Hindu practices, thus undermining the ability of the Buddhists to propagate their beliefs.
Because of its ability to affect human health and because of its aggressive and fast growing character it is illegal in some areas of New Zealand to sell, propagate, or distribute any part of the plant.
This void, termed an ampulla, would hinder the ability of the " crack " formed by the serration to propagate through the tooth.
These can also aid the ' spotting ' ability of wildfires to propagate and start new fires.
propagate and for
This period must be longer than the amount of time it takes for a signal to move, or propagate, in the worst-case scenario.
: Copenhagenists claim that interpretations of quantum mechanics where the wave function is regarded as real have problems with EPR-type effects, since they imply that the laws of physics allow for influences to propagate at speeds greater than the speed of light.
Because the impactor is moving so rapidly, the rear of the object moves a significant distance during the short-but-finite time taken for the deceleration to propagate across the impactor.
These provide both a means for cruising sailors to stay in touch with families and loved ones and equally serve to propagate the lifestyle and share information between cruisers and ' want-to-be ' cruisers.
But Fermi also participated in preliminary work on the hydrogen bomb at Los Alamos as a consultant, and along with Stanislaw Ulam, calculated that the amount of tritium needed for Edward Teller's model of a thermonuclear weapon would be prohibitive, and a fusion reaction could not be assured to propagate even with this large quantity of tritium.
This allowed searches to propagate further through the network, and allowed for numerous alterations in the topology which have improved the efficiency and scalability greatly.
Because waves at different frequencies propagate at differing phase velocities in dispersive media, for a large frequency range ( a narrow envelope in space ) the observed pulse would change shape while traveling, making group velocity an unclear or useless quantity.
The neighborhood is known for its colorful, artistic residents and the alternative culture they propagate.
Memes that propagate less prolifically may become extinct, while others may survive, spread and ( for better or for worse ) mutate.
There can be many purposes for such a record, such as recording evidence to verify the effectiveness of specific procedures ( per the scientific method that Aleister Crowley claimed should be applied to the practice of magick ) or to ensure that data may propagate beyond the lifetime of the magician.
A separate address is used for the submission of posts and the moderators then propagate posts which are approved for the readership.
Nichiren, on the other hand, confirms that the teachings of the Lotus Sutra will flourish for all eternity, and that the Bodhisattvas of the Earth will propagate Buddhism in the future.
To propagate the language rapidly, a compiler " porting kit " was created in Zurich that included a compiler that generated code for a " virtual " stack machine, i. e., code that lends itself to reasonably efficient interpretation ), along with an interpreter for that code – the Pascal-P system.
Such glycine-alanine repeats are also found in nature, for example in silk fibroin ; in particular, certain Epstein-Barr virus gene products bearing this sequence can stall the proteasome, helping the virus propagate by preventing antigen presentation on the major histocompatibility complex.
Kew was the location of the successful effort in the 19th century to propagate rubber trees for cultivation outside South America.
The liberum veto was finally abolished with the adoption of Poland's 3rd May Constitution in 1791, a piece of legislation which was passed as ' The Government Act ', and for which the Sejm required four years to propagate and adopt.
Because seismic waves commonly propagate efficiently and interact with internal structure, they provide high-resolution noninvasive methods for studying Earth's interior.
Because the group velocity for such a field is superluminal, naively it appears that its excitations propagate faster than light.
Although arbitrary wave shapes will propagate unchanged in lossless linear time-invariant systems, in the presence of dispersion the sine wave is the unique shape that will propagate unchanged but for phase and amplitude, making it easy to analyze.
0.232 seconds.