OVERVIEW: Communications jammers are electronic warfare systems used to disrupt, deny, or degrade enemy voice and data communications across a wide range of frequencies. These systems have evolved from analog wideband noise jammers to sophisticated digital systems with selective and reactive jamming capabilities.

GENERAL DESCRIPTION: Communications jammers operate by emitting powerful radio signals that interfere with the reception of enemy transmissions, targeting both tactical voice radios and modern digital networks. Early systems relied on brute-force barrage jamming, while more modern jammers utilize digital RF memory (DRFM), frequency-following, spot, sweep, and deceptive jamming techniques. They can be vehicle-mounted, airborne (e.g., EA-6B, EA-18G), ship-based, or man-portable. Some jammers also support Electronic Attack (EA) missions in SEAD (Suppression of Enemy Air Defenses) by targeting air defense communications. Integration with SIGINT/COMINT systems enhances jammer efficiency by enabling emitter recognition and prioritization.

ROLE SUMMARY:
Category: Electronic Attack (EA) / Communications Denial
Primary Use: Disruption of enemy command, control, and communication (C3) systems
Function: Emission of jamming signals to degrade or block voice/data transmission
Platform: Ground vehicles, aircraft, UAVs, naval vessels, fixed sites
Export: Limited to allied militaries under strict controls
Integration: Often paired with ESM/COMINT suites and battlefield electronic warfare coordination systems

See Specific information under [Sensors/EW] section.

SOURCE:
Raytheon, Northrop Grumman, and L3Harris EW Systems Overviews
NATO AECTP-500 Electronic Warfare Doctrine
https://en.wikipedia.org/wiki/Jammer_(electronic_warfare)