研究目的
Investigating the use of a defect photonic crystal waveguide (DPCW) as a slow-wave structure (SWS) for terahertz (THz) traveling-wave tube (TWT) to improve stability and performance.
研究成果
The proposed DPCW SWS for THz TWT demonstrates improved stability and performance with a saturated output power of 12.1 W and a gain of 24.3 dB at 220 GHz. The structure is easy to fabricate and assemble, making it suitable for THz practical demands.
研究不足
The study is limited to simulation results and does not include experimental validation. The performance of the DPCW-TWT in practical applications may vary due to fabrication tolerances and environmental factors.
1：Experimental Design and Method Selection:
The DPCW SWS was designed based on a square lattice and pillars, optimized for a 220-GHz central operation frequency. Floquet’s mode analysis in CST Microwave Studio was used for analysis.
2：Sample Selection and Data Sources:
The material of the DPCW is copper with a conductivity of σ = 2e7 S/m at 220 GHz.
3：List of Experimental Equipment and Materials:
CST Microwave Studio for simulation, copper for DPCW material.
4：Experimental Procedures and Operational Workflow:
The DPCW SWS was built with 170 periods for the interaction section, and input/output couplers at both ends. The design was optimized to minimize reflection and transmission loss.
5：Data Analysis Methods:
The 3-D PIC simulations were performed by the PIC solver of CST with hardware acceleration of NVIDIA Tesla K40c.
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