HI ,,
am doing a project about radio Jamming ,,
i need ideas about the required circuit & components needed ...
can u Plz email me any papers,,books,,notes or anything can help
my email :: anes_allosh5@hotmail.com
i did google it but i didnt find any good detials about the circuit or the antenna that i should use ,,
i want a simple design that performs jamming for lets say 10 meters or less ,,,
plus the i want it a radio jamming not mobile jamming ....
plz if anyone did this before send me some info about it..
the range 5 to 10 meters is good for me ,,
all what i want is a simple circuit works at RF frequency performs jamming
to test it infront of my Dr at the Lab ..
Depending on experience, but in general is a good FM wide-band jamming circuit a bit complicated to build. Typical must it have a noise generator for modulation, a sawtooth generator that can control FM transmitter center-frequency and the transmitter of course. Good jamming is still only reached within few meters. Compare this relative complicated circuit containing five transistors or more, with a simple single transistor FM-transmitter that easy can cover several 100's of meters. If this FM transmitter is tuned at same frequency as a commercial FM-station can it also easy drown it out with your own content within 10 meters or more. That is also a kind of jamming. As signal source can any cheap MP3 player be used.
An alternative jamming circuit, that not need any transistors at all: Spark-gap_transmitter
Problem with this circuit is that it requires a high DC voltage. From a low voltage battery can this voltage be produced by using a self oscillating relay and a diode, so no transistor would be needed.
It is very easy to build, as even I have succeeded with the circuit.
A spark jammer is probably illegal in your country and a spark-transmitter includes high voltages, so be careful, it can be deadly even if a low voltage battery is used as source, and with wrong polarized capacitors can it even be explosive.