期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 67, 期 1, 页码 108-120出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2018.2878082
关键词
Bianisotropy; broadside radiation; field transformation; Huygens' principle; leaky-wave antenna (LWA); metasurface
资金
- Marie Sklodowska-Curie through the European Union's Horizon 2020 Research and Innovation Programme [706334]
- Marie Curie Actions (MSCA) [706334] Funding Source: Marie Curie Actions (MSCA)
In this paper, a novel concept of a leaky-wave antenna is proposed, based on the use of Huygens' metasurfaces. It consists of a parallel-plate waveguide in which the top plate is replaced by a bianisotropic metasurface of the omega type. It is shown that there is an exact solution to transform the guided mode into a leaky mode with arbitrary control of the constant leakage factor and the pointing direction. Although the solution turns out to be periodic, only one Floquet mode is excited and radiates, even for electrically long periods. Thanks to the intrinsic spurious Floquet mode suppression, broadside radiation can be achieved without any degradation. Simulations with idealized reactance sheets verify the concept. Moreover, physical structures compatible with PCB fabrication have been proposed and designed, considering aspects such as the effect of losses. Finally, experimental results of two prototypes are presented and discussed.
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