What are common radar jamming types and their effects?

• A. Noise jamming floods the receiver with random noise and reduces signal-to-noise ratio.
• B. Noise jamming, deception jamming, spot jamming; mitigated by filtering, ECCM, and frequency agility.
• C. Echo jamming uses reflected signals to confuse tracker; mitigated by increasing power.
• D. Phase-coded jamming rotates the polarization to degrade target detection; mitigated by polarization diversity.

Answer: (B)

Understanding radar jamming starts with the main categories: noise jamming, deception jamming, and spot jamming. Noise jamming floods the receiver with random energy, raising the noise floor and reducing the signal-to-noise ratio so the radar has trouble detecting weak targets. Deception jamming goes beyond noise by injecting false information into the radar’s track or video, creating ghosts or misleading range, Doppler, or bearing readings. Spot jamming concentrates jammer power into a narrow beam or a narrow frequency slice to temporarily blind a specific target or gate without broadening the effect to the whole system.

Mitigations line up with these effects: filtering and signal processing help reduce interference and recover genuine signals, which is part of electronic counter-countermeasures (ECCM). ECCM encompasses advanced techniques to distinguish real targets from jammers and to adapt the radar’s processing. Frequency agility makes the radar hop between frequencies so a jammer cannot stay synchronized with the signal, reducing the jammer’s impact.

The other options describe a narrower or different concept (for example, a specific type like echo/repeater interference or a polarization-based tactic) and don’t capture the common, broad spectrum of jam types and the standard countermeasures as effectively.