Filtered-noise jammer

An improved noise jamming device for producing a non-uniform RF spectrum with a random density pattern comprising:

• a. a noise source generating a continuous spectrum of noise frequencies from direct current to about 5 MHz,
• b. a low pass filter means in circuit with said noise source attenuating all frequencies above a selected cut-off frequency within the range of from 500 Hz to 5 KHz,
• c. an amplifier in circuit with said low pass filter means for amplifying the output of said low pass filter means,
• d. said low pass filter means and said amplifier in circuit therewith forming a single integrated circuit comprising:
• 1. a first T-filter network for filtering high frequencies which allow direct current and lower frequencies to pass,
• 2. an operational amplifier having a feedback network and a second T-filter both in parallel therewith, said operational amplifier connected to amplifier of said first T-filter for further reducing high frequency components from input signals thereto,
• 3. a drive circuit connected to the output of said operational amplifier, said drive circuit serving as a power amplifier, and
• 4. a blocking capacitor for eliminating any remaining direct current leaving an output of only low frequency components,
• e. a modulator in circuit with said amplifier and being responsive to the noise spectrum passed by said low pass filter means to produce a spot or barrage noise signal output having a non-uniform density RF spectrum with a random density pattern, and
• f. a transmitter in circuit with said modulator for transmitting the output signal from said modulator circuit.