Cell phone jammers

What is Cell Phone Jammer?
A cell phone jammer is a device that can block the reception or transmission of cell phone signals. This is mainly achieved by creating some form of interference in the operating frequency ranges of cell phones, resulting in no signal or a significant loss in signal quality. Although cell phone jammers can be used virtually anywhere, they are primarily used in areas where quiet is expected or needed.

A Handy Jammer consists of:

- antenna
- Voltage controlled oscillator
- voting circuit
- Noise generator
- Power supply
- RF amplification

When a cell phone jammer is active, most cell phones will not display a network signal, and when the cell phone jammer is off, the cell phone will be active. Cell phones use unique frequencies to speak and hear. Most cell phone jammers block one of the two frequencies, indirectly creating the effect of preventing both. Cell phone jammers work on the same principles as jammers that prevent radio communication. They work either by breaking the frequencies from cell phone to base station or from base station to cell phone.

Cell phone jammers are used by law enforcement and the military to limit and disrupt communications during various situations. Certain companies use cell phone jammers to prevent corporate espionage by blocking communications in sensitive areas. Some people also use portable cell phone jammers to prevent others from using cell phones in their immediate vicinity.

Aside from military and law enforcement applications, cell phone jamming is illegal in many countries, including the United States. US law prohibits the sale or purchase of cell phone whines and has some of the strictest laws in the world regarding their use. Some countries, such as Mexico, allow cell phone jammers to be used in public areas such as hospitals. Different countries have different laws regarding the use of cell phone jammers.

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