China is building an increasingly sophisticated anti-stealth radar network, but its effectiveness may hinge less on individual sensor performance than on the ability to integrate, maintain, and operate the wider system under combat pressure, according to a recent report from the China Aerospace Studies Institute (CASI).
The report, released last month, argues that Beijing's drive to counter and replicate US stealth technology is reshaping the Indo-Pacific air balance but remains constrained by flawed assumptions about how low-observable aircraft operate. The 1999 Serbian shootdown of an F-117 reinforced Chinese confidence in low-frequency radar and encouraged investment in layered sensors, integrated air defenses, and indigenous stealth aircraft such as the J-20, J-35, and planned H-20 bomber.
However, the report warns that China often treats stealth as a hardware problem, underestimating US advantages in mission planning, electronic warfare, software, training, and tactical adaptation. Chinese radars may provide early warning but still struggle to generate the continuous, weapons-quality tracks needed for engagement amid clutter, electronic attack, and complex terrain around Taiwan and the South China Sea.
Technical Limitations and Network Solutions
A March 2023 article by Lu Xiaoqiang and co-authors in the peer-reviewed Chinese Journal of Aeronautics found that radar returns from stealth aircraft are highly dependent on geometry because radar cross-section varies sharply with aspect angle. Stealth shaping concentrates stronger returns into a narrow set of angular sectors while suppressing returns across most other aspects. Stronger detections occur mainly when one of those narrow signature peaks aligns with a radar's line of sight. Because the aircraft's aspect changes continuously in flight, those peaks may appear only briefly, producing intermittent contacts rather than a stable track during penetration.
Even with that limitation, a January 2023 article by Ye Kang and co-authors in IET Radar, Sonar & Navigation shows how a distributed radar network could partially compensate for such intermittent and corrupted data through collaborative track fusion. Individual radar nodes first filter background noise and reject tracks identified as probable deception targets. The nodes then exchange and iteratively reconcile their remaining track estimates with neighboring sensors. Repeated exchanges reduce the influence of any corrupted sensor and allow the network to converge on a more reliable estimate of the target without depending entirely on a central command node.
Real-World Combat Performance Questions
Yet a greater uncertainty is whether these concepts can survive the maintenance, integration, electronic warfare, and command pressures of actual combat. A January 2026 Newsweek report raised questions about the performance of Venezuela's Chinese-made JY-27A radars during a US raid, citing maintenance problems, limited readiness, and weak integration as possible explanations. The Miami Strategic Intelligence Institute assessed that spare-parts shortages and minimal Chinese technical support had reportedly left more than 60% of Venezuela's radar fleet out of commission.
The episode illustrates a broader point: even a functioning counter-stealth radar has limited value if it cannot pass usable tracks to command centers, fighters, or surface-to-air missile batteries. Reporting on recent operations in Iran has prompted similar questions, although the available public evidence remains incomplete.
Van Taylor pointed out in a May 2026 Wall Street Journal article that China's YLC-8B anti-stealth radars failed to detect low-observable US and Israeli aircraft in a high-intensity combat environment during the opening hours of Operation Epic Fury. Instead of tracking stealth targets, the network was bypassed entirely; the sole US F-35 damaged during the March hostilities was struck using a passive infrared sensor system rather than any radar, exposing operational deficiencies in China's military hardware.
Separately, Miles Maochun Yu argued in a Hoover Institution commentary this month that the June 2026 crash of a light aircraft into Beijing's CITIC Tower raised questions about coordination within China's tightly controlled airspace. Yu attributed the incident to possible institutional barriers between civilian air-traffic authorities and military command. However, Chinese authorities later said the pilot had deliberately deviated from his approved flight area and had mental health issues; they did not link the crash to military command failures.
The central question remains whether China can turn an expanding collection of sensors into a resilient combat network capable of maintaining reliable tracks on low-observable aircraft. As the CASI report warns, exaggerated confidence in counter-stealth defenses could embolden Beijing and heighten the risk of miscalculation. It recommends that the US institutionalize stealth education, expand operator training, and sustain bomber deployments in the Indo-Pacific.
For a broader perspective on China's evolving military strategy, see our analysis of China's desert mock-up of a US destroyer and the implications for anti-carrier warfare. The interplay between radar networks and electronic warfare also echoes challenges seen in US wartime buildup racing against China's industrial clock in the Indo-Pacific.
