Military authorities want to procure a radar capable of detecting stealth aircraft by the mid-2020s as China and Japan boost their military arsenal.
An Air Force officer on Wednesday said, "The Air Force first called for stealth-detection radar in July 2011, and the Joint Chiefs of Staff decided in November last year to build such a detection system in the long term."
"The Agency for Defense Development and other institutes are developing a stealth-detection radar. Once we know how good the domestic technology is, we'll decide whether to develop the radar independently or buy it from abroad," another military officer said.
The military is developing several models including low-frequency radar.
"Experts predict that stealth-detection radar will be developed in four to five years," Defense Minister Kim Kwan-jin told the National Assembly's Defense Committee last month.
A military source said, "Nobody knows how much it'll cost to develop a stealth-detection radar because none exists so far."
China, Japan and Russia are all developing or planning to procure stealth fighter jets between 2016 and early 2020.
China is developing two kinds of stealth fighters.
In December 2011, Japan picked the F-35 stealth fighter jet as its main next-generation fighter model and decided to procure 42 of them starting in 2016.
Russia is developing a stealth fighter with the goal of deploying it warfare-ready in 2016.