研究目的
To present a multilayer frequency selective surface (MFSS) with good flexibility, high selectivity, wide bandwidth and insensitive polarization.
研究成果
A flexible multilayer frequency selective surface with two transmission zeros is presented. The proposed MFSS is very attractive for many applications in radomes, antennas and shielding materials which have a growing demand for flexible, lightweight, low-cost, conformal and high selectivity characteristics.
研究不足
The measured stop band where locating the two transmission zeros is higher than that obtained by simulation, which is due to adhesion error among several layers when substrates are bonded together.
1：Experimental Design and Method Selection:
The design involves a multilayer FSS unit cell composed of metallic quasi-Jerusalem-cross patterns and a coupling aperture pattern separated by flexible dielectric substrates. The equivalent circuit is derived to explain the principle of transmission poles and zeros.
2：Sample Selection and Data Sources:
A prototype flexible MFSS centered at
3：6 GHz is fabricated and measured. List of Experimental Equipment and Materials:
The MFSS is composed of three metallic layers with a pair of quasi-Jerusalem-cross patterns and a coupling aperture pattern separated by several thin flexible dielectric substrates including polyimide and Teflon slabs.
4：Experimental Procedures and Operational Workflow:
The MFSS sample is measured inside the anechoic chamber using a pair of lens horn antennas connected to a VNA.
5：Data Analysis Methods:
The time domain gating method is applied to reduce the diffraction.
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