期刊
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
卷 18, 期 7, 页码 1386-1389出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2019.2917561
关键词
Leaky-wave antenna (LWA); narrow band; open stopband; spoof surface plasmon polariton (SSPP); substrate integrated waveguide (SIW)
资金
- National Natural Science Foundation of China [61801487, 61871207]
- National Postdoctoral Program for Innovative Talents of China [BX20180370]
- Natural Science Foundation of Hunan Province, China [2017JJ3364]
- Postgraduate Research and Innovation Project of Hunan Province, China [CX2017B017]
- Research Project of National University of Defense Technology [ZK17-03-42]
In this letter, a wide-angle narrowband leaky-wave antenna (LWA) based on substrate integrated waveguide-spoof surface plasmon polariton (SIW-SSPP) structure is proposed. Periodic slots are etched on both the top and bottom surfaces of SIW to introduce an SSPP mode. The periodic slots on the top surface are sinusoidally modulated to realize bidirectional LWA radiation. The problem of open stopband is solved by the asymmetrical design of the top and bottom slots. Thus, a wide bidirectional scanning range from -60 degrees to + 63 degrees is achieved. Besides, the relative bandwidth of the fabricated antenna is reduced to only 9% by introducing the slow-wave effect of SSPP. It means the proposed antenna has a large scanning rate, or equivalently beam scanning range/bandwidth ratio.
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