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Accurate and Robust Characterization of Metasurface-Enabled Frequency Reconfigurable Antennas by Radially Homogeneous Model
摘要： A category of frequency recon?gurable antennas realized by rotating mechanically a meta- surface mounted atop a source radiator has attracted growing attention. Their electromagnetic properties and range of frequency recon?gurability have, nevertheless, not been satisfactorily studied. To this end, an equivalent radially homogeneous model is ?rstly proposed in this paper. The retrieval process is accordingly formulated to address the polarization dependence of the retrieved effective electromagnetic parameters. A couple of typical metasurface-based frequency mechanically recon?gurable antennas are thus characterized by the proposed model. The predicted central operating frequencies are validated against the results of full-wave simulation and the measurement ones of manufactured proof-of-concept prototypes. Further comparisons to the isotropic and the anisotropic models con?rm superior accuracy, robustness, and simplicity of the proposed characterization model. In addition, frequency recon?gurable range is shown to be determined by the anisotropy of the metasurface, related to the geometrical symmetry of its constitutive unit cell.
关键词： electromagnetic homogenization,anisotropic model,NRW,Metasurface
更新于2025-09-11 14:15:04
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[IEEE 2018 International Conference on Smart City and Emerging Technology (ICSCET) - Mumbai, India (2018.1.5-2018.1.5)] 2018 International Conference on Smart City and Emerging Technology (ICSCET) - Dual-band Planner Slot antenna loaded with Split Ring Resonators for WLAN/Wi-Max Applications
摘要： Microstrip fed dual band planner slot antenna using split ring resonators (SRR) is proposed. Split ring resonator acting as a loading element introduces dual bands, which can be controlled by altering the number of rings and the space between them. Wideband is achieved at both resonating frequencies by using the circular shape of SRR and slot antenna. With satisfactory gain and radiation pattern the proposed antenna is suitable for lower range of WLAN and higher range of Wi-MAX and other broadband services. The design and optimization is carried out using CST Microwave Studio. Nicolson-Ross-Weir (NRW) approach is used to verify the Double Negative properties of this structure.
关键词： Metamaterials,Slot Antenna,NRW Approach,SRR
更新于2025-09-09 09:28:46