研究目的
Investigating the design of dual-band bandpass frequency-selective surfaces (FSSs) with large band ratio (BR) for military applications.
研究成果
The proposed method successfully designs a dual-band bandpass FSS with a large BR of 15.3 and a -10 dB FBW of 164.3%, without spurious transmission windows. This fills a gap in existing FSS designs and provides guidance for future multi-band FSS development. Future work includes dual-polarized designs and integration with absorbers for wider applications.
研究不足
The practical implementation is limited by commercially available PCB technology, particularly in achieving spaces between neighboring fingers of less than 0.1 mm for sufficient capacitance. The design's applicability at millimeter wave bands is suggested but not fully explored.
1：Experimental Design and Method Selection:
The study employs a novel method combining resonant and non-resonant elements to design a spurious-free dual-band bandpass FSS with large BR. The methodology includes the use of equivalent circuit model (ECM) and closed-form equations for analysis.
2：Sample Selection and Data Sources:
A design example is simulated, fabricated, and measured to validate the proposed method.
3：List of Experimental Equipment and Materials:
The fabrication involves PCB printing technology, using TLY-5-0200 substrates and interdigital capacitors (IDCs).
4：Experimental Procedures and Operational Workflow:
The design process includes simulation using CST Microwave Studio, fabrication of the FSS prototype, and measurement using the free-space method with standard gain horn antennas.
5：Data Analysis Methods:
The performance is analyzed based on transmission coefficients, band ratio (BR), and fractional bandwidth (FBW), with comparisons made to existing designs.
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