There is only one transceiver on Laythe, well there is 8 total but they are all attached to the same ship. There are no other ships in the Kerbol system that are using microwave energy as of this time. Laythe's atmosphere should be no factor in this for two reasons. 1. The ship worked fine before the update and received all the energy it needed from its parent ship in high orbit. 2. The parent ship (800KM up retro-orbit) is recieaving 5.5GW of power from Kerbin via it's Large Phased Array Transceiver. The opposite side of the ship has another Large Phased Array Transceiver that is emitting at least 5GW down to Laythe. I need to get some more shots so you know what the whole ship looks like with it's parent ship. I'll send some tonight when I am off work.