The present invention is a dramatically enhanced RF link for low-data-rate applications, using one or more transmitters to communicate with one or more receivers, at dramatically enhanced ranges. The coil is included in a tank circuit that may have a variable reactance. The base station 404 includes a receiver 428 that receives a quality metric 432 from a remote station 106. The method proceeds by forming an outer spacer around sidewalls of each gate structure. Responsive to determining the signature, the virtual machine image and the signature is sent.