Open AccessHigh‐directivity radiation based on the leaky mode of spoof surface plasmon polaritons
Author(s) -
Wu Jin Jei,
Shen Linfang,
Hou Da Jun,
Kao YaoHuang,
Wu ChienJang,
Shen Jian Qi,
Yang TzongJer
Publication year - 2014
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2013.0479
Subject(s) - surface plasmon polariton , directivity , optics , radiation , surface plasmon , physics , radiation properties , plasmon , mode (computer interface) , dispersion (optics) , antenna (radio) , telecommunications , engineering , computer science , operating system
The guiding properties of spoof surface plasmon polaritons (SPPs) in an array of hollowed‐out metallic blocks standing on a metallic surface are theoretically investigated in this study. For such spoof SPPs, there exists an additional guiding mode except for the fundamental mode and the former is closely related to hollowing out metal blocks. The dispersion band of this additional mode has a negative slope (corresponding to a group velocity) and it intersects the light line and then enters the radiation region as the frequency grows, which leads to a frequency steering pencil‐like radiation. The transmission and radiation properties of the additional mode of spoof SPPs are finally verified experimentally.