研究目的
To develop a lower operating voltage and high electron efficiency terahertz backward wave oscillator (BWO) using a novel helical groove rectangular waveguide slow wave structure (HGRW-SWS).
研究成果
The HGRW SWS integrates high interaction impedance and low ohm loss into the high frequency circuit of BWO, enabling watt-level output power in a 250 GHz operating bandwidth. This novel HGRW BWO has potential applications as a high power terahertz radiation source.
研究不足
The study is limited to theoretical analysis and simulations without experimental validation. The practical implementation and fabrication challenges of the HGRW-SWS are not addressed.
1：Experimental Design and Method Selection:
The study involves the design and analysis of a novel helical groove rectangular waveguide slow wave structure (HGRW-SWS) for terahertz BWO applications. Theoretical models and 3D electromagnetic simulation software Ansoft HFSS are employed for analysis.
2：Sample Selection and Data Sources:
The study focuses on the HGRW-SWS with specific dimensional parameters optimized for operation in the 0.9-1.15 THz frequency range.
3：9-15 THz frequency range.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Ansoft HFSS software is used for electromagnetic simulations.
4：Experimental Procedures and Operational Workflow:
The study includes the analysis of cold characteristics of the HGRW-SWS, comparison with double staggered grating SWS (DSG-SWS), and particle-in-cell code simulations to predict output power and oscillation frequency.
5：Data Analysis Methods:
The analysis involves comparing dispersion relation curves and interaction impedances of HGRW-SWS and DSG-SWS, and simulating the output power and oscillation frequency of the BWO based on HGRW SWS.
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