類表面電漿之時-空間色散工程於高頻雷達系統之整合應用(1/2)

In this research proposal, a brand-new deployment scenario of a high frequency (3-30 MHz) ground wave radar integrated with a spoof surface plasmon structure is proposed. With the aid of the surface wave mode sustained by the proposed temporally dispersive plasmonic structure, the theory analysis and simulation results show that the ground wave can be still effectively excited when the radar antenna array is buried in the ground. This way to deploy the ground wave radar can also reduce the skywave interference. The most important of all, the radarantenna array with high concealment and safety cannot be “seen” by microwave radar and/or satellite. In this way, this work is of immense value on national defense as well as civil use. On the other hand, benefiting from the leaky wave mode supported by the spoof surface plasmon structure, the ground wave radar can be directly used as the high frequency sky wave radar. In addition to the ground wave suppression, the range accuracy of the radar can be enhanced through controlling the radiation angle of the leaky wave and thereby such a radar system has a superior detection performance and two kinds of propagation modes of radar waves. Finally, we will design a spoof surface plasmon structure with temporal and spatial dispersion to mimic the characteristics of ionosphere and its effects on the sky wave radar. The prototype experiments of ground and sky wave radar will be conducted to verify the theoretical and simulated results. Some practical engineering issues will be studied, e.g., the depth of the buried antenna, material properties of ground layers, and substrate selection. The temporal and spatial dispersion engineering of the spoof surface plasmon structure will be integrated with and applied to high frequency radar systems throughout this project.