Missile Defense Radars Create Single Points of Failure for Entire Systems

Every missile defense system depends on radar for target detection, tracking, discrimination, and fire control. The AN/TPY-2 radar enables THAAD, the EL/M-2084 radar enables Iron Dome, and the Green Pine radar enables Arrow. Each of these radars is an extremely high-value, difficult-to-replace asset. If an adversary destroys, jams, or degrades the radar, the entire missile defense battery it supports becomes blind and useless -- regardless of how many interceptors remain in the launchers. A single successful strike or electronic warfare attack on one radar can disable an entire sector's air defense. This vulnerability matters because adversaries have specifically designed weapons to target air defense radars. Anti-radiation missiles (ARMs) like the Russian Kh-31 and Chinese YJ-91 home in on radar emissions. Iran has demonstrated ARM capability, and Hezbollah possesses anti-ship missiles that could be adapted for radar targeting. Electronic warfare systems can jam or spoof radar returns, creating false targets or masking real ones. The radar is simultaneously the most critical and most vulnerable component of any missile defense system. The operational consequence is that an adversary does not need to overwhelm a missile defense system with sheer volume of rockets -- they can disable it by taking out one radar. This is far cheaper and more efficient than a saturation attack. A single cruise missile or armed drone costing $100,000 could neutralize a $1.5 billion THAAD battery by destroying its $500 million radar. This asymmetry incentivizes adversaries to prioritize radar-hunting in their strike planning. This problem persists because high-performance missile defense radars are inherently conspicuous. They emit powerful electromagnetic signals that can be detected, located, and targeted from hundreds of kilometers away. While the radars can operate in various modes to reduce their signature, fire-control mode -- required for actual intercepts -- demands sustained high-power emissions that are essentially a beacon for anti-radiation weapons. The structural issue is that missile defense architectures were designed around centralized, exquisite sensor nodes rather than distributed, resilient sensor networks. Each radar costs hundreds of millions of dollars, so programs buy few of them and make each one a critical node. A distributed architecture using many cheaper sensors would be more resilient but would require fundamental redesign of battle management systems, interceptor guidance, and command-and-control networks -- a generational engineering effort that no country has yet completed.