In fact, when constructing the second batch of "Xue Yuanzheng" class, the Empire Navy had considered equipping them with phased array radar.
However, at that time, the available technology was passive phased array radar, and miniaturization technology of electronic equipment was insufficient, making the entire radar system extremely cumbersome. If used on a carrier, and to ensure no impact on other departments, at least a 50% increase in the projection area of the island would be required, occupying about six deck parking spots. As for the assistance phased array radar would provide to the carrier, it was evidently less significant than that provided by an Anti-Air Cruiser.
As a result, the Empire Navy eventually abandoned this idea.
Equipping a carrier with AESA radar is not to enhance its air defense combat capability, but to replace all other radars with one radar.
Simply put, it actually simplifies the radar system.
