According to the range of Samsung frequencies used to transmit, the transmission medium may be radio candy bar phone waves, microwaves terrestrial or satellite, and infrared, mobile phones for example. LG Depending on the medium, the wireless network with every plan will have some other features:
Radio waves: the electromagnetic waves are omnidirectional, so it is not necessary dishes. all the plans include The transmission is not sensitive to the attenuation caused by rain as it operates at cellular coverage frequencies not too high. In this range there HTC are bands from ELF which range from 3 to 30 Hz, to the UHF band ranging from 300 to 3000 MHz, ie, comprising radio spectrum from 30 – 3,000,000 Hz
Microwave terrestrial satellite dishes are used with wireless providers a diameter of about three wireless phones meters. Have a coverage of miles, but with the disadvantage that the transmitter and receiver must be perfectly aligned. Therefore, we tend slider phone to use point to point links over short distances. In this case, the attenuation caused by rain is more important since it operates at a higher frequency. Include microwave frequencies Motorola from 1 to 300 GHz
Microwave satellite links are made between two or more ground stations are known as base stations. The satellite receives the signal (called the uplink) in a frequency band, amplifies and retransmits on another banda (senal downward). Each satellite operates in specific bands. The boundaries cellular phones of the microwave frequency, both terrestrial Nokia and satellite, with the infrared and radio waves of high frequency is quite mixed, so there may be interference with communications at certain frequencies.
Infrared: transmitters and receivers are linked to modulate the infrared light is not coherent. Must be aligned directly or with a reflection on a surface. Can not get through the walls. Infrared range from 300 GHz to 384 cellular phones THz.
- Business Wire via Yahoo! Finance
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