CELL TOWERS AND WIRELESS COMMUNICATIONS LIVING WITH RADIOFREQUENCY RADIATION Part 4

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Inside a Cellphone Radiation Testing Lab
By Priya Ganapati

In other words, Pong’s claims seem to be legitimate: Its case reduces the amount of radiation going from the iPhone into your head to a third of what it would be without the case. Contrary to what we initially wrote on the Pong case, it does appear to work.

An anechoic chamber is used to test the iPhone’s signal strength. Another test that handset makers often run on their devices is the signal strength test. The test is conducted in a specially constructed chamber called an anechoic chamber. Cetecom has a radio-frequency anechoic chamber where the interior surfaces are covered with radiation-absorbent material.

In this case, the iPhone is strapped to the model with the phone facing the ground. The test measures the effective level of radiated power that the phone emits while in a transmit mode. The burst power or the channel power from the phone is measured. The result is a spherical radiation pattern that yields the Total Radiated Power.

The test takes about 45 minutes including setup and is almost completely automated. A lab technician only needs to position the phone right and make sure the computer spews out the results. In case of the iPhone, the total radiated power was 12.54 dBm (decibels referenced to one milliwatt) and remained almost the same with the Pong case, indicating that the sleeve has no effect on signal strength of the phone.

If you’re not an iPhone user, you can learn more about how much cellphone radiation you’re getting from your phone.

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