Giving a false speed reading


Posted on Feb 7, 2014

This is basically how the Scorpion jammers work except that instead of sending back a shifted doppler corresponding to a certain speed, they send back a constantly varying doppler shift where some units won`t display a reading while others display constantly changing readings. There have been other units that send back a speed, but they didn`t work on the same principle.


Giving a false speed reading
Click here to download the full size of the above Circuit.

The ECM 5446 sent back a very powerful tone-modulated signal in order to fool the radar into displaying a speed. I thought that if the ATR or DSR guns could distinguish betweenn the strongest and fastest targets that it would simply show your actual speed in the fastest target and show your desired speed in the most powerful target, if in fact you could overpower your actual doppler shift signal. If the Scorpion jammer works by detecting the actual frequency and then firing back shifting signals around that frequency why can it only jam 3 of the commonly used 12 Ka frequencies I thought that if the ATR or DSR guns could distinguish betweenn the strongest and fastest targets that it would simply show your actual speed in the fastest target and show your desired speed in the most powerful target, if in fact you could overpower your actual doppler shift signal. If the Scorpion jammer works by detecting the actual frequency and then firing back shifting signals around that frequency why can it only jam 3 of the commonly used 12 Ka frequencies For another, varactor tuned Gunn oscillators for Ka are expensive, and they don`t have the range to be tuned over a 2. 6 GHz wide band. You would need multiple oscillators, that would be a lot of space and $$$. I would bet that the Scorpion uses three, one for each freq. No, but the general concept is simple. Just tone-modulate a gunn oscillator at the required doppler shift. Use a...




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Ringer-relay
    Automatic Turn-Off Alarm With Delay
    Current Source
    Higher Order Filters
    Police Car Lights with LEDs
    Guitar Effects & JFET Splitter
    Wireless Sensor Motor Control Circuit
    555 practical DC stepless dimmer circuit diagram



    Top