1. 16/11/12 Homemade Signal Jammer Information | eHow.com
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eHow » Electronics » Cell Phone Service » Cell Phone Signal » Homemade Signal Jammer Information
Homemade Signal Jammer Information
By Mateo Zeske, eHow Contributor
Homemade signal jammers are used to
interfere with communication between a cell
phone tower and phones in its area so they
can not make or receive calls. The jammer
transmits signals along the same radio
frequencies as the phone transmission so
that they collide, denying service of the radio
spectrum. The practice of signal jamming is
legal in some countries but in others, like the
United States, it is not.
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Legality
The FCC outlawed the use of signal jammers, so information about how to make
a homemade version is not widely publishable. However, components of the Check It Out
device and information on their function are available.
Antenna
Cell phone jammers need an antenna to transmit the offending signal. In smaller
products the antenna is an internal component, housed within an electrical
cabinet, while external antennas are used for longer range. Parenting With Social
Media by Mom.me
Electrical Components
The interference signal is generated by an oscillator. A tuning circuit channels the
required voltage to the oscillator, which sets the limits for the jammer broadcast's You May Like
frequency. The circuit also contains a noise generator that emits random
electronic output in the boundaries of the set frequency range. The output is Homemade Cell Phone
Jammer
bolstered by RF amplification to make it high enough to jam the specific signal.
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References
FCC: Blocking and Jamming How to Make a Frequency
Jammer
Resources
The Legalities of Cell Phone
Signal Jammer: Cell Phone Jammer News Jammers
Photo Credit Polka Dot Images/Polka Dot/Getty Images
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Jammers
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2. 16/11/12 Homemade Signal Jammer Information | eHow.com
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