Lockheed Martin Licenses UD Technology for Testing Lockheed Martin has licensed technology developed in part by a University of Dayton team led by electrical and computer engineering professor Guru Subramanyam to test whether it can work with sensors to eliminate interference from sources that would otherwise degrade the performance of the sensors. Subramanyam's tunable varactors are made of a thin, ceramic film that is less expensive than silicon-based devices. Very low battery-powered voltage changes manipulate the electrical properties of the film to switch the frequencies that allow the use of different gadgets and improve signal reception. Originally developed to cut the number of filters used to sort frequencies in cell phones, TVs and satellite communication systems, the varactors have evolved to support rapid reconfiguration of radio frequency and microwave sensors conducting simultaneous operations.