F-35 and F-22 fighter jets might be able to share data while keeping 'stealth attack' mode

If an F-22 and F-35 were both operating in full stealth attack mode behind enemy lines, striking air defenses, searching for targets and preparing the airspace for a less-stealthy air campaign, then how do the undetectable fifth-generation fighter jets communicate with each other without generating a potentially detectable electrical signal, giving away their position?  

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