Vandy Russ Mobile Phone Blog

Phones have radio waves and microwaves…what do they do?

mobile phones have both those radiations being used…but what is each one for?
they must both have a different function…

The microwave used in phones is in fact a radio wave and in the UK they are 0.9 and 1.8 Gigahertz.

The purpose of a radio wave is to carry from a transmitter to a receiver. This bit gets highly technical.
A radio wave is a vibrating electro-magnetic energy and oscillates. The oscillation is measured in a sine wave. A sine wave looks like this:

http://www.lightandmatter.com/html_books/6mr/ch04/figs/sine-wave.png

If you start at the left, go up, down and back up again you get a period of oscillation, or one cycle. However many cycles per second the wave makes gives it it’s frequency and we measure this in Hertz: 1 cycle per second = 1 Hertz.
Now, the higher the frequency, the shorter the wavelength, and the equation for this is l=c/f where l is the wavelength, c the speed of light and f the frequency.
Consider the radio station Classic FM which broadcasts a 100 MHz or 100 000 000 Hz. l = 300 000 000/100 000 000 which gives a 3 metre wavelength. The phone’s wavelength is 0.38 metres, very short. The shorter the wavelength, the less distance it can travel round the earth’s curvature.
We now have this high frequency wave being transmitted and received. On it’s own it isn’t much good, so information in the form a series of zeroes and ones (i.e digital) is encoded on to it. The wave now carries the zeroes and ones to the receiver. BUT- you need both the handset and the base station to be transmitters and receivers and what’s more they have to do it at the same time (a duplex channel) and have a frequency exclusive to it so that other calls can’t be heard on your phone. The technology used used to be called Time Break Recall and thousands of time per second your phone is hanging up and recalling and being allocated a new frequency in the process.

So the short answer is that the micro(radio)waves are carrying the information that is whatever you’re speaking or listening to on your phone. They carry it to and from the base station with which your phone is currently in contact.

Mobile Phone in Microwave

Mobile Phone Programming: and its Application to Wireless Networking $109.00 This book provides a solid overview of mobile phone programming for readers in both academia and industry. Coverage includes all commercial realizations of the Symbian, Windows Mobile and Linux platforms. The text introduces each programming language (JAVA, Python, C/C++) and offers a set of development environments “step by step,” to help familiarize developers with limitations, pitfalls, and cha…

Public Health SOS: The Shadow Side Of The Wireless Revolution $16.93 Electromagnetic factors in health is an emerging public health issue globally, creating electrical sensitivity and being linked to illnesses of many kinds. Read this primer on EMF and health by Prof. Magda Havas of Canada and environmental activist and management consultant to change agents, Camilla Rees, founder of www.ElectromagneticHealth.org. Learn what the independent science shows, what you …

Advances in Electromagnetic Fields in Living Systems: Volume 5, Health Effects of Cell Phone Radiation $112.66 Health Effects of Cell Phone Radiation will offer a concentrated and up-to-date overview on the effects of radio frequencies on human tissue. While significant advances are being made on many fronts, ranging in frequency from quasi-static to the optical regime, a special emphasis of this volume is on current understanding of biological interactions of cellular mobile communication radiation. The u…

…