US's non-lethal weapon Active Denial system uses 95 GHz frequency, but if i want to concentrate 2-3 GHz frequency which is easily available without much investment what is best way? & can i reduce penetrating effect for same frequency?
the principal component you need is a magnetron. Of course, the magnetron is certainly not that simple. A slight cone-shaped metal funnel has the best microwave-focusing ability. The circuit diagram for each individual magnetron looked something like the attached diagram.There are two large magnets that "direct" the electrons as they pass through the antenna. Also, the device must have a heat sink to cool off. The waveguide (or metal funnel cone) guides the microwaves in a linear direction, and allows them to be focused in a specific direction. Once directed, the microwaves can generate electrical current in any conductive metal they encounter. How much electricity they generate is determined by the distance from the magnetron and the power of the output. Essentially to reduce the penetration effects is necessary to act on the emitted power.
best regards
A parabolic antenna would work. But it is easier to use a tuned array of 4 helical antenas with reflectors to direct the beam. The parabola will allow you to focus the beam, the helical will shoot in one direction without focus. Focus of a parabola is a simple formula. I suspect you need lots of power to be able to have a "denial zone" of more than a meter or so. Old microwaves are great source of magnetrons. As far as microwave amplifiers, I leave it to the experts. I am just an MD and Amateur Radio that did moon-bounce communication in the 70's
Sergio
To reduce generation of current (& possible sparks) will it be beneficial to go for less conductive metals like Stainless steel?@ Andrea Piroddi
Thanks & Regards
yes, of course. you can you use lead (pure) or steel (carbonized) too.
best regards
Rectangular or circular horn is the best choice with regard to its high availability. Another important feature - high directivity and low side-lobe level.
actually i know why,
at higher frequency MW will penetrate less (1/64th of an inch with 95 GHz) which is about thickness of 3 sheets of paper.
at 2.5 GHz it corresponds to 4.7 inch approx.@Denis Jaisson
Dear Sir,
If you dont like a penetrating effect, so you must use a reflection material like cupper and use it as a electromagnetic lense.
Sincerely Yours
F. Gräbner
- Badges
- Science topic
- Similar topics
- Mathematical Sciences
- Control Theory
- Control Systems