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Continuous-wave Y-band planar BWO with wide tunable bandwidth
Hongzhu Xi1, Jianguo Wang2,3, Zhaochang He1
1The Institute of Anhui Huadong photoelectric Technology, Wuhu, Anhui, 241002, China.
Scientific Reports
|January 12, 2018
Summary
This study presents a high-performance continuous-wave (CW) backward wave oscillator (BWO) operating in the Y-band. The device utilizes a planar slow wave structure (SWS) and sheet electron beam, achieving state-of-the-art output power.
Area of Science:
- Physics
- Electrical Engineering
- Terahertz Technology
Background:
- Backward wave oscillators (BWOs) are crucial for generating high-frequency electromagnetic waves.
- Developing efficient BWOs in the Y-band (0.3-0.4 THz) presents significant engineering challenges.
- Continuous-wave (CW) operation is essential for many advanced applications.
Purpose of the Study:
- To design and demonstrate a high-performance CW BWO in the Y-band.
- To investigate mode selection mechanisms for optimal device operation.
- To achieve state-of-the-art output power and frequency tunability.
Main Methods:
- Utilized planar slow wave structures (SWSs) fabricated with UV-LIGA technology.
- Employed a sheet electron beam with precise current density control.
- Analyzed dispersion curves, electric field distributions, and particle-in-cell simulations for mode selection.
- Conducted experimental validation of the BWO's performance.
Main Results:
- The designed BWO operates in the fundamental TM11 mode.
- Achieved an output power of 182 mW at 0.3426 THz.
- Demonstrated a wide frequency tuning range from 0.318 THz to 0.359 THz.
- Fabrication achieved a processing error of less than 0.003 mm.
Conclusions:
- The developed Y-band CW BWO with a planar SWS and sheet electron beam is a high-performance device.
- The study confirms the TM11 mode operation and demonstrates significant output power and tunability.
- UV-LIGA technology enables precise fabrication for advanced millimeter-wave devices.
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