This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
A new method for achieving amplitude reconfiguration in a reflectarray antenna is presented in this Letter. An individual unit cell is a compact multilayer structure, including a silver inkjet-printed layer for rapid prototyping of the reflectarray. A small infrared light emitting diode (IR-LED) illuminating a silicon wafer provides the reconfiguration in the system. Various illumination intensities of the IR-LED allow for differing magnitudes of reflection from the unit cell. This provides the potential for radiation pattern tapering or amplitude modifications of the gain of the reflectarray. Simulation and measurement results for a single unit cell are presented here, with the matching between measurement and simulation also allowing for the change in the values of conductivity of the silicon to be extracted.
References
-
-
1)
-
9. Pereira, R., Gillard, R., Sauleau, R., et al: ‘Four-state dual polarisation unit-cells for reflectarray applications’, Electron. Lett., 2010, 46, (11), pp. 742–743 (doi: 10.1049/el.2010.0770).
-
2)
-
3. Carrasco, E., Barba, M., Encinar, J.: ‘X-band reflectarray antenna with switching-beam using pin diodes and gathered elements’, IEEE Trans. Antennas Propag., 2012, 60, (12), pp. 5700–5708 (doi: 10.1109/TAP.2012.2208612).
-
3)
-
4. Panagamuwa, C.J., Chauraya, A., Vardaxoglou, J.C.: ‘Frequency and beam reconfigurable antenna using photoconducting switches’, Trans. Antennas Propag., 2006, 54, (2), pp. 449–454 (doi: 10.1109/TAP.2005.863393).
-
4)
-
8. Alizadeh, P., Andy, A.S., Parini, C., et al: ‘A reconfigurable reflectarray antenna in Ka-band using optically excited silicon’. European Conf. on Antennas and Propagation (EuCAP), Davos, Switzerland, April 2016, pp. 1–5.
-
5)
-
1. Huang, J., Encinar, J.A.: ‘Reflectarray antennas’ (John Wiley & Sons, Inc., Hoboken, NJ, 2007).
-
6)
-
3. Bildik, S., Dieter, S., Fritzsch, C., et al: ‘Reconfigurable folded reflectarray antenna based upon liquid crystal technology’, Trans. Antennas Propag., 2015, 63, (1), pp. 122–132 (doi: 10.1109/TAP.2014.2367491).
-
7)
-
5. Gamlath, C.D., Benton, D.M., Cryan, M.J.: ‘Microwave properties of an inhomogeneous optically illuminated plasma in a microstrip gap’, Trans. Microw. Theory Tech., 2015, 63, (2), pp. 374–383 (doi: 10.1109/TMTT.2014.2387276).
-
8)
-
6. Su, H., Yang, B., Liu, X., et al: ‘Optically controlled frequency selective surface for millimeter-wave applications’. Proc. IEEE Int. Symp. Antennas and Propagation (APSURSI), Chicago, IL, July 2012, pp. 1–2.
-
9)
-
7. Flemish, J.R., Haupt, R.L.: ‘Optimization of a photonically controlled microwave switch and attenuator’, Trans. Microw. Theory Tech., 2010, 58, (10), pp. 2582–2588 (doi: 10.1109/TMTT.2010.2065350).
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