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- W1606975671 abstract "It is a matter of great concern that places where no electromagnetic waves are reached are seen even nowadays when various types of wireless equipment are available anywhere without any concern. That is to say, the fact that places where no electromagnetic waves are reached are found is a problem bringing about unpleasantness to the users, and concurrently is a problem to be solved for those engaged in communication business. Here arises a skepticism why places where no electromagnetic waves are reached are in existence. The matter believed to be the greatest cause of the above is attenuation and interference generated by encounter of the electromagnetic waves with their obstacles. For example, almost all of the base stations (base exchanges) of cellular phones are established outdoors. To accomplish indoor-use of cellular phones, the electromagnetic waves should be aligned so that it will enter the spot deep enough from the entrance in the inside of the buildings by overcoming the obstructing walls. However the electromagnetic waves are liable to be attenuated when they go through the walls, and the waves reflected by the walls interferes with the ones that are going to reach the walls. As a result, the electromagnetic waves are made weak in the vicinity of the buildings or inside of them. This is believed to consequently be linked with creation of difficulty in achieving wireless communications. It remains to be seen in what a manner the number of the places where no electromagnetic waves are reached is being reduced. As a matter of the fact however, none of easy method to solve this problem is available, and the number of such places has to be reduced one by one every day by repeating such strenuous operations as allowing the places where no electromagnetic waves are reached to be identified and by permitting the waves to be reached on such places with the change of the spots where base stations are settled together with adjustment of the output. Such strenuous trials are put to action by the hands of various researchers with a view to eliminating the troublesomeness of the work. At this stage, let the research that has been made to now be reviewed. With the operations to identify the places where none of electromagnetic waves are reached, two methods, i.e. the one to measure the waves and the other one in accordance with simulation are available. Despite the above, it might be next to impossible to recognize the field strength of the electromagnetic waves in the whole area where wireless communication is utilized. Therefore proposals for a simulation method that can adjust the settling position of the base" @default.
- W1606975671 created "2016-06-24" @default.
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- W1606975671 date "2011-03-16" @default.
- W1606975671 modified "2023-10-02" @default.
- W1606975671 title "Electromagnetic Waves Propagating Around Buildings" @default.
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- W1606975671 doi "https://doi.org/10.5772/13587" @default.
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