Key facts Mobile phone use is ubiquitous with an estimated 6. Studies are ongoing to more fully assess potential long-term effects of mobile phone use.
Cellular cell phones first became widely available in the United States in the s, but their use has increased dramatically since then. Along with the large and still growing number of cell phone users both adults and childrenthe amount of time people spend on their phones has also risen sharply in recent decades.
Cell phones including smartphones give off a form of energy known as radiofrequency RF wavesso some concerns have been raised about the safety of cell phone use. With respect to cancer, concern focuses on whether cell phones might increase the risk of brain tumors or other tumors in the head and neck area.
How do cell phones work?
|How are people exposed?||There are few ways to do this, for example through analysis of KPI Key Performance Indicator or through prediction tools and signal interference. Other very common and efficient way to evaluate the network is conducting a Drive Test.|
|Low Radiation Cell Phones||This article has been cited by other articles in PMC. Abstract Background Earlier we have shown that the mobile phone radiation radiofrequency modulated electromagnetic fields; RF-EMF alters protein expression in human endothelial cell line.|
|How do cell phones work?||Frequency range and use High Frequency HF is the term used to describe that part of the electromagnetic spectrum comprising the frequency range from kHz to GHz. At high frequency, the electric and the magnetic fields, which together make up the electromagnetic field, are interrelated and considered jointly for measurements.|
|Best RF Meter for Microwave Radiation from Cellphones and WiFi | Listen To Your Gut||Lai explained that the microwave frequency used in the study was 2, MHz, which is not the same as that emitted by cell phones — or 1, MHz.|
Cell phones work by sending signals to and receiving them from nearby cell towers base stations using RF waves. This is a form of electromagnetic energy that falls between FM radio waves and microwaves. Like FM radio waves, microwaves, visible light, and heat, RF waves are a form of non-ionizing radiation.
RF waves are different from stronger ionizing types of radiation such as x-rays, gamma rays, and ultraviolet UV light, which can break the chemical bonds in DNA. At very high levels, RF waves can heat up body tissues. This is the basis for how microwave ovens work. But the levels of energy given off by cell phones are much lower, and are not enough to raise temperatures in the body.
How are people exposed? The RF waves from cell phones come from the antenna, which is part of the body of a hand-held phone. The waves are strongest at the antenna and lose energy quickly as they travel away from the phone.
The phone is typically held against the side of the head when in use.
The body tissues closest to the phone absorb more energy than tissues farther away. Many factors can affect the amount of RF energy to which a person is exposed, including: The amount of time the person is on the phone.
Whether or not the person is using the speaker mode on the phone or a hands-free device.
Using one of these allows the phone to be held away from the head. The distance and path to the nearest cell phone tower.For those concerned about the harmful effects of mobile phone radiation, using a low radiation cell phone is commonly believed to be one of the ways to minimize potential risks.
Based on the large and still growing number of cell phone users (both adults and children), and the fact that cell phones give off radio-frequency (RF) waves, some concerns have been raised about the safety of cell phone use.
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Conclusion: Mobile Phone and Rf Radiation Exposure Essay Results have shown that attachment of RF shield on mobile phone not only reduces SAR in head model but also the radiated power.
Moreover, the RF shielding does not degrade the antenna performance. However there is slight variation in return losses when compared with RF shielding. Wireless Hands-Free Devices. Hands-free kits can be used with cell phones for convenience, comfort, and improved safety.
These systems reduce the absorption of RF radiation in the head because the phone’s antenna, which is the source of the radiation, is not near the head.
Given the large number of mobile phone users, it is important to investigate, understand and monitor any potential public health impact.
Mobile phones communicate by transmitting radio waves through a network of fixed antennas called base stations.