A tunable impedance surface performing as a reconfigurable beam steering reflector
- 7 August 2002
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 50 (3), 384-390
- https://doi.org/10.1109/8.999631
Abstract
We describe a reconfigurable microwave surface that performs as a new kind of beam steering reflector. The surface is textured with an array of tiny resonators, which provide a frequency-dependent surface impedance. By tuning the individual resonators, the surface impedance, and thus the reflection coefficient phase, can be varied as a function of position across the reflector. Using a reflection phase gradient, the surface can steer a reflected beam. As an example, we have built a simple mechanically tuned surface in which physical motion of only 1/100 wavelength generates a sufficient phase gradient to steer a reflected beam by /spl plusmn/16 degrees. To steer to greater angles, the surface can be configured as an artificial microwave grating, capable of /spl plusmn/38 degrees of beam steering. The concept of the tunable impedance surface demonstrated here can be extended to electrically controlled structures, which would permit more elaborate reflection phase patterns, and provide more capabilities, such as the ability to focus or steer multiple beams.Keywords
This publication has 19 references indexed in Scilit:
- Antennas on high-impedance ground planesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Low-Profile, Switched-Beam Diversity Antennas Using High-Impedance Ground PlanesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2000
- The application of photonic crystals to quasi-optic amplifiersIEEE Transactions on Microwave Theory and Techniques, 1999
- Design and performance of a microstrip reflectarray antennaIEEE Transactions on Antennas and Propagation, 1995
- Artificially soft and hard surfaces in electromagneticsIEEE Transactions on Antennas and Propagation, 1990
- Surface Plasmons on Smooth and Rough Surfaces and on GratingsPublished by Springer Nature ,1988
- On the theory of corrugated plane surfacesTransactions of the IRE Professional Group on Antennas and Propagation, 1954
- A Study of Single-Surface Corrugated GuidesProceedings of the IRE, 1951
- Some Slow-Wave Structures for Traveling-Wave TubesProceedings of the IRE, 1949
- Wave Guides for Slow WavesJournal of Applied Physics, 1948