The comparison between the Eurofighter Typhoon and the Lockheed Martin F-35 Lightning II focuses on their advanced fire-control radars, with a detailed analysis released on Apr. 19 highlighting differences in technology and operational philosophy.
The evaluation of these two Western combat aircraft centers around how their Active Electronically Scanned Array (AESA) radars shape air combat effectiveness, survivability, and adaptability. Both jets feature state-of-the-art systems: the Typhoon’s CAPTOR-E (and upcoming ECRS Mk2 upgrade) prioritizes sensor power and electromagnetic flexibility, while the F-35’s AN/APG-81 is designed as part of an integrated sensor-fusion suite.
At the hardware level, both radars use AESA technology but are products of different doctrines. The AN/APG-81 was created for stealth and low-probability-of-intercept operation within a networked environment. It has 1,676 transmit/receive modules and is expected to remain in production through contracts beyond 2035. In contrast, the CAPTOR-E uses gallium nitride modules for higher power output and features a mechanically steerable array that offers a wider field of regard than fixed arrays like those on the F-35.
Detection range is one area where physical design plays a significant role. Open-source estimates suggest that while the F-35’s radar can track targets at about 90 to 100 miles, the Typhoon’s CAPTOR-E (especially with its ECRS Mk2 upgrade) extends this range to approximately 120 miles due to its larger antenna aperture. The steerable nature of CAPTOR-E also provides about a 200-degree scan arc versus roughly 120 degrees for conventional fixed arrays.
Both platforms are evolving in electronic warfare capabilities. The AN/APG-81 has supported electronic attack functions since early production models, allowing suppression of enemy air defenses using its multifunction array since at least 2006. The ECRS Mk2 aims to advance this further by integrating offensive jamming directly into its radar system; initial units are expected from 2028 following significant investment from the UK Ministry of Defence.
Sensor fusion distinguishes the F-35’s approach: “The AN/APG-81 does not operate alone,” according to analysis published by Simple Flying. Its integration with other onboard sensors produces an advanced battlespace picture not matched by current competitors. However, “the honest conclusion is that these two radars are expressions of different visions of air power.” While Eurofighter emphasizes raw detection capability and agility through upgrades like ECRS Mk2, Lockheed Martin’s design leverages stealth combined with networked sensors for situational awareness.
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