Author_Institution :
Department of Electrical and Computer Engineering, The University of Texas at Austin, 1 University Station C0803, 78712, USA
Abstract :
Antennas are the basic tool we use to bridge structural modes into free-space radiation. The properties of an antenna depend on its geometry, materials, and electric size, as well as on its environment. These are the degrees of freedom that one typically has in an antenna design, which determine its characteristics such as directivity, gain, input impedance, radiation efficiency etc. However, one may ask what about the time variable? Can it be used as an additional degree of freedom, namely, would it be possible to increase the variety of properties of a given antenna by modulating its materials, or by loading its terminals by a time dependent resonant tanks?
