https://scholars.lib.ntu.edu.tw/handle/123456789/581148
標題: | Signal-to-noise ratio enhancement of high frequency ground wave radar based on a metamaterial-based transition structure | 作者: | Ou Yang L.Y Chen S.Y. SHIH-YUAN CHEN |
關鍵字: | Electromagnetic wave polarization; Guided electromagnetic wave propagation; Ionosphere; Metamaterial antennas; Metamaterials; Phonons; Photons; Plasmonic metamaterials; Radar; Radar antennas; Radar reflection; Surface plasmons; Surface waves; Ground waves; Guided wave structures; Hf ground wave radars; High frequency ground wave radar; Mode matching technique; Signal-to-noise ratio enhancement; Spoof surface plasmons; Transition structures; Signal to noise ratio | 公開日期: | 2018 | 卷: | 2018 | 期: | CP741 | 來源出版物: | IET Conference Publications | 摘要: | A metamaterial-based transition structure is proposed in this paper for converting the power from a radar antenna installed on a costal sand land to the surface wave supported by the air/sea interface instead of leaky wave into the air or sky. With the proposed structure, the power from the antenna can firstly couple to the spoof surface plasmon polariton (SPP) mode sustained by the metamaterial-based transition structure. After propagating away from the costal line, the SPP guided-wave mode then couples to the conventional surface wave propagating along the air/sea interface by mode-matching technique. Simulated results reveal that the signal-to-noise ratio (SNR) of HF ground wave radar can thus be enhanced over 8 dB in a wide frequency range by adding the proposed metamaterial-based structure in front of the radar antenna installed on the sand land. The design concept can also be applied to the HF ground wave radar to reduce the sky wave interference due to reflection from the ionosphere. ? Institution of Engineering and Technology.All Rights Reserved. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85057343583&partnerID=40&md5=09c7905d4a3b37f6ff6f9c0ae94f4a0d https://scholars.lib.ntu.edu.tw/handle/123456789/581148 |
顯示於: | 電機工程學系 |
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