Doppler cloak is a cover to be placed in front or wrapped around a moving object to restore the source illumination frequency, as if it were not in motion, bringing the object to operate again in the standard static conditions. This feature is useful in narrowband applications, such as invisibility cloaks and highly resonant antennas, where a small detuning from the design operation frequency is sufficient for losing the invisibility effect or the communication link, respectively. Here, we show some results on the application of Doppler cloaks in these two scenarios. First, we consider the simple case of a cloaked cylindrical metallic scatterer in motion and, then, an antenna system composed of two antennas that are moving with respect to each other. Our preliminary results show that the Doppler cloak can shift the band of the propagating signal within the operative band of the cloak and of the receiving antenna, restoring the operative conditions for both cases.
Ramaccia, D., Bilotti, F., Toscano, A., Sounas, D.l., Alu, A. (2018). Time-varying metamaterial Doppler cloak: Applications to invisibility and antennas. In 2018 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting, APSURSI 2018 - Proceedings (pp.1855-1856). 345 E 47TH ST, NEW YORK, NY 10017 USA : IEEE.
Time-varying metamaterial Doppler cloak: Applications to invisibility and antennas
Ramaccia, D
Writing – Original Draft Preparation
;Bilotti, FSupervision
;Toscano, ASupervision
;Alu, AMembro del Collaboration Group
2018-01-01
Abstract
Doppler cloak is a cover to be placed in front or wrapped around a moving object to restore the source illumination frequency, as if it were not in motion, bringing the object to operate again in the standard static conditions. This feature is useful in narrowband applications, such as invisibility cloaks and highly resonant antennas, where a small detuning from the design operation frequency is sufficient for losing the invisibility effect or the communication link, respectively. Here, we show some results on the application of Doppler cloaks in these two scenarios. First, we consider the simple case of a cloaked cylindrical metallic scatterer in motion and, then, an antenna system composed of two antennas that are moving with respect to each other. Our preliminary results show that the Doppler cloak can shift the band of the propagating signal within the operative band of the cloak and of the receiving antenna, restoring the operative conditions for both cases.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
