Time-varying transistor-based metamaterial for tunability, mixing, and efficient phase conjugation
Abstract
We present a transistor-based microwave metamaterial exhibiting tunability over a wide range of time scales. By loading a metamaterial with a transistor, we show through theory and simulation that both the resonant frequency and quality factor of the metamaterial can be dynamically tuned with a voltage bias. We demonstrate through experiment that such a time-varying transistor-based metamaterial exhibits this tunability. The tunability is applicable to a wide range of time scales, from quasi-static effective parameter tuning to parametric pumping for mixing and phase conjugation. We then apply the metamaterial to a particular application of phase conjugation and demonstrate through simulation and experiment that a very strong phase conjugated signal is produced. We experimentally show that the mixing efficiency for a transistor metamaterial is over 30 dB stronger than that of a varactor-based phase conjugate metamaterial.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 08, 2014
- Source ID
- 10.1063/1.4871195
Entities
People
- Alexander R. Katko
- John P. Barrett
- Steven A. Cummer
Organizations
- Army Research Office
- Duke University