Chinese repay for US Stealth drone intelligence?

Geostrategy Direct (Bill Gertz):

Iran acquires Chinese communications, GPS jammers via North Korea

LONDON — Iran has received advanced communications jammers over the last year and employed them as part of its air defense network. Sources said the jammers were believed to have arrived from North Korea, Teheran’s leading military ally.

Iran claims it cracked the code on its U.S. Air Force’s RQ-170 Sentinel UAV, captured over Iran in December 2011.    WorldNewsTribune.com 

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The sources said the jammers might have been linked to the downing of the U.S. Air Force’s RQ-170 Sentinel UAV over Iran in December 2011. Teheran has asserted that its electronic warfare systems downed the UAV, something rejected by U.S. officials.

“These jammers have been used by Iran as well as North Korea to disrupt communications of both military and civilian aircraft,” a Western industry source said.

The sources said the Chinese-designed jammers were meant to torpedo global positioning systems on a range of platforms, including fixed-, rotary-wing aircraft and unmanned aerial vehicles. They said the jammers could also disrupt navigational and communications systems.

South Korea said the Chinese jammers disrupted 252 civilian flights in late April. The government said none of the flights was in danger of crashing.

“There has been no problem in our military operations,” the South Korean Joint Chiefs of Staff said.

As early as 2010, Seoul warned of the Chinese-origin jammers. Officials said the jammers could also disrupt guided weapons as well as military communications.