Cell Phones Physics assignment

In today’s day and age the cell phone has become a common item in many of our lives. The convenience of being able to call someone just about anywhere in the world is unrivaled by any other previous form of communication, and its accessibility makes it welcoming to everyone. However, despite its familiarity in modern day culture very few people know the history, and the inner workings of this technological marvel. In the following you will see some of the general technology that goes into the cellular phones communication systems, as well as a small glance into the cell phones broad history.
The cell phone has many internal workings, but the most important ones, would be those that allow the signal/message to be transmitted to whoever you would like to call, or are being called by. When speaking in this sense you find that Cell Phones operate through electromagnetic Radio waves, which are then transmitted to the antenna of a cell site base station. Generally, the radio wave that this signal is carried on is of “ultra high frequency” (300–3000 MHz, 1 m – 100 mm, frequency and wavelength), and transmitted/received by a low power transceiver. The distance covered by these waves is usually 8 to 13 km, as they are transmitted to the nearest cell site.
The invention of the cell phone as we know it today was a long and ever changing process. The original patent for a wireless telephone was issued in 1908 to Nathan B. Stubblefield of Murray Kentucky. Although Nathan Stubblefield had the original patent for the system that is used in today’s cell phones, he didn’t apply that patent in a way ambiguous to cellular phone of today. The first introduction of cells for a mobile phone base station was originally developed by Bell Labs Engineers at AT&T in 1947, and further developed in the 1960’s. From here, the technology continued to developed into the cellular phone we know today.
References.
http://en.wikipedia.org/wiki/Cell_phones
http://en.wiipedia.org/
http://library.thinkquest.org/04oct/02001/home.htm