Circuit's Blog :
Return to BlogWave Bubble as Portable RF Jammer
Posted Feb 08, 2012 at 1:29 pm
Figure 1
The project illustrates the construction and design of a wave bubble that contains a wide bandwidth and self-tuning portable RF jammer.
For easy camouflaging, the RF jammer is made to be small and lightweight as with the size of a pack of cigarettes. The internal battery used is rechargeable through a mini USB connector or 4mm DC jack and is made from lithium ion that provides up to 2 hours of jamming of two bands. For a single band jamming such as GPS, Wi-Fi, cordless phone, Bluetooth, the battery can last up to 4 hours. Three AAA batteries may also be used as an alternative.
For high bands, the output power is 0.1W while for low bands is 0.3W. Using well-tuned antennas can reach an effective range around 20 feet radius. The range could be less with poorly matched antennas or internal antennas.
The jammer does not require a spectrum analyzer since the self-tuning is provided via dual PLL and a single wave bubble can jam several frequency bands. The reconfiguration of RF bands can be done by plugging the device to the USB port of a PC and typing the new frequency.
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2 years ago: My question is, why is there a need to jam RF signals? For what purpose was it created. I might be interested to build this if I know where would I be using this...
2 years ago: hello there.could you give me a schematic of the project.nice one;)
1 year ago: travis, there are many uses for this piece of equipment. Because of this, the Wave bubble RF Jammer is illegal in most countries, particularly in the United Kingdom.