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#Phone signal booster free#

Gain is defined as the ratio of the output power to the input power and is measured in decibels (dB). What Is a Cell Phone Signal Booster?Ī cell phone signal booster is a device that amplifies radio waves. A cell phone signal booster can overcome all of these problems. These factors together cause dropped calls and interference. Cell phone signals do not travel well through water because it absorbs the signal and turns it into heat.

Rain, fog, and even high humidity can interfere, too.

You may have noticed that during winter when there’s less foliage, you get more “bars,” indicating that signal strengths are measurably better. The biomass of trees and other foliage contains water that absorbs and reflects radio signals.

This absorption problem also exists in rural and suburban areas.

People speak of “urban canyons,” which are places in dense, downtown areas where the street is flanked by buildings on both sides creating a canyon-like environment that absorbs up to 99 percent of radio waves and makes cell phone service spotty at best. Radio waves pass through buildings, trees, and other obstacles, but are partially absorbed and lose energy in the process. That’s when you get the “No Service” message, but even before that, you’ll have poor reception. As you continue moving away, the signal strength will eventually fall to levels your cell phone cannot detect. The strength continues to decrease by half each time you double the distance from the tower. So, as you move from one to two miles away, the signal strength falls to half.

The signal transmitted by the cell tower reduces in strength by 50 percent each time you double the distance away from the tower.

However, several factors can reduce the strength of the waves reaching your phone. The strength of those high-frequency electric fields (radio waves) leaving the cell tower is measured in volts.

Cell phone radio waves have frequencies that range from around 700 MHz to more than 2100 Mhz (700 million to 2.1 billion cycles each second). Radio transmitters change the current flow much faster hundreds of millions of times per second. While you’ll never be able to manipulate the dial fast enough to create radio waves, the experiment outlined here produces a changing electric field around the wire The length of each sine wave is known as its wavelength, and the number of sine waves per second is the frequency. The faster you change the current from minimum to maximum, the shorter the distance between peaks on the sine waves. When you adjust the dial in a carefully controlled fashion, you’ll be able to create a sine wave like that pictured below. When you adjust the current flowing from the point where no current flows, to another point that delivers the maximum current available from your battery, those changing currents cause the electric field around the wire to change. How could you create such waves yourself? Imagine you have a battery, a copper wire, and a dial to control how much current flows through the wire. They travel through space at the speed of light. The electric field is what we call radio waves.

It consists of both an electric field and a magnetic field. He discovered that when electric current passes through a conductor such as a piece of copper wire, the current creates an electromagnetic field around the wire.

Michael Faraday (1791-1867), a self-taught English scientist, is recognized as one of the most influential scientists in history. Radio signals - like the AM radio band, the FM band, and even signals from satellites orbiting the planet - are all produced by passing an electric current through a wire. Cell phones, therefore, are transceivers. A cell phone contains a transmitter that sends out radio waves and a receiver that decodes incoming radio waves. Most people know their cell phones use radio signals to communicate, but many don’t understand the basics that make cell phones work.

#Phone signal booster free#

If you’re already familiar with the basics, feel free to skip to the discussion below. First, we are going to talk about the very basics behind cell phone communication, then get more into signal boosters and how they work. Curious how cell phone signal boosters work? Well, understanding the answer depends on how much you know about cellular radio communication.