The F-35 Fighter Jet's New Radar Can Double as a Weapon
Washington, Sunday, 5 July 2026.
The F-35’s upcoming AN/APG-85 radar will use high-power microwave energy to disable enemy electronics, though severe production delays have pushed deliveries to at least 2028.
A Paradigm Shift in Aerial Warfare
The concept of modern air superiority is undergoing a fundamental transformation, transitioning from traditional kinetic dogfights to advanced electronic and electromagnetic domination [GPT]. As of July 2026, defense analysts and military experts observe a distinct shift where next-generation combat aircraft must function essentially as airborne electrical power stations [1]. This evolution is driven by the need to support high-intensity artificial intelligence (AI) processors, advanced sensor suites, and directed-energy weapons [1]. At the center of this technological leap is the AN/APG-85 active electronically scanned array (AESA) radar, designed for the Block 4 modernization of the Lockheed Martin (NYSE: LMT) F-35 Lightning II and developed by Northrop Grumman (NYSE: NOC) [GPT][1].
The Power and Thermal Management Challenge
Operating such a revolutionary sensor suite requires extraordinary amounts of electrical power and generates immense thermal energy [GPT]. The AN/APG-85 demands significantly higher radio-frequency power generation and cooling capacity than the current AN/APG-81 radar system [1]. This power-hungry profile has forced a major redesign of the F-35’s internal architecture, necessitating the Engine Core Upgrade (ECU) and the modernization of the Power and Thermal Management System (PTMS) [1]. Managing this heat is a critical financial and operational hurdle; a 2023 projection warned that failing to resolve the F-35’s insufficient cooling capacity could result in tens of billions of dollars in cumulative sustainment costs over the aircraft’s lifecycle [1].
Countering Near-Peer Adversaries
The development of the AN/APG-85 was originally initiated to counter rapid advancements in Chinese stealth fighter and radar technologies [1]. This geopolitical technological race has only intensified. On July 4, 2026, reports highlighted that the fourth flight prototype of a Chinese sixth-generation fighter has emerged as a primary threat to the F-35’s current sensor capabilities [1]. To maintain its competitive edge in the global export market and secure long-term air dominance, the F-35 program must successfully navigate these thermal and power-management bottlenecks to field the AN/APG-85 [GPT][1].