Frequency-Selective Surface Based on Negative-Group-Delay Bismuth–Mica Medium
Negative group delay may be observed in dispersive media with anomalous dispersion in a certain frequency range. The fact that an outgoing wave packet precedes an incoming one does not violate the causality principle but is only a consequence of a waveform reshaping. This effect is observed in media...
Main Authors: | , , , , |
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Format: | Article |
Language: | English |
Published: |
MDPI AG
2023-04-01
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Series: | Photonics |
Subjects: | |
Online Access: | https://www.mdpi.com/2304-6732/10/5/501 |