设计了一种紧凑的新型宽带双模带通滤波器。该滤波器基于一个直连馈线弯曲方环谐振器的带阻结构,加载调谐短截线构成带通滤波器,通过将所加载短截线弯曲实现滤波器的小型化。此外,方环1/4角上放置微扰并在侧面阻带位置激起的模式可以实...设计了一种紧凑的新型宽带双模带通滤波器。该滤波器基于一个直连馈线弯曲方环谐振器的带阻结构,加载调谐短截线构成带通滤波器,通过将所加载短截线弯曲实现滤波器的小型化。此外,方环1/4角上放置微扰并在侧面阻带位置激起的模式可以实现带通滤波器的选择性。实验结果表明:滤波器的中心频率为5.41 GHz,3 d B带宽为59.5%,插入损耗为0.16 d B,带内的反射损耗大于11 d B,符合设计要求。展开更多
A side band power re-injection locked （SBPRIL） magnetron is presented in this paper. A tuning stub is placed between the external injection locked （EIL） magnetron and the circulator. Side band power of the EIL mag...A side band power re-injection locked （SBPRIL） magnetron is presented in this paper. A tuning stub is placed between the external injection locked （EIL） magnetron and the circulator. Side band power of the EIL magnetron is reflected back to the magnetron. The reflected side band power is reused and pulled back to the central frequency. A phase-locking model is developed from circuit theory to explain the process of reuse of side band power in SBPRIL magnetron. Theoretical analysis proves that the side band power is pulled back to the central frequency of the SBPRIL magnetron, then the amplitude of the RF voltage increases and the phase noise performance is improved. Particle-in-cell （PIC） simulation of a 10-vane continuous wave （CW） magnetron model is presented. Computer simulation predicts that the frequency spectrum＇s peak of the SBPRIL magnetron has an increase of 3.25 dB compared with the free running magnetron. The phase noise performance at the side band offset reduces 12.05 dB for the SBPRIL magnetron. Besides, the SBPRIL magnetron experiment is presented. Experimental results show that the spectrum peak rises by 14.29% for SBPRIL magnetron compared with the free running magnetron. The phase noise reduces more than 25 dB at 45-kHz offset compared with the free running magnetron.展开更多
为了提升微带天线的带宽,设计了一种具有U型调谐枝节的宽频带E型微带天线。通过在传统的E型微带天线引入U型调谐枝节,改变电容电感,优化天线的阻抗匹配,使得带宽增加了16.7%。仿真结果表明,该天线实现了26.1%的相对带宽,工作频率范围为2...为了提升微带天线的带宽,设计了一种具有U型调谐枝节的宽频带E型微带天线。通过在传统的E型微带天线引入U型调谐枝节,改变电容电感,优化天线的阻抗匹配,使得带宽增加了16.7%。仿真结果表明,该天线实现了26.1%的相对带宽,工作频率范围为2.0~2.6 GHz（S11〈-10 d B）。展开更多
文摘设计了一种紧凑的新型宽带双模带通滤波器。该滤波器基于一个直连馈线弯曲方环谐振器的带阻结构,加载调谐短截线构成带通滤波器,通过将所加载短截线弯曲实现滤波器的小型化。此外,方环1/4角上放置微扰并在侧面阻带位置激起的模式可以实现带通滤波器的选择性。实验结果表明:滤波器的中心频率为5.41 GHz,3 d B带宽为59.5%,插入损耗为0.16 d B,带内的反射损耗大于11 d B,符合设计要求。
基金Project supported by the National Basic Research Program of China(Grant No.2013CB328902)the National Natural Science Foundation of China(Grant No.61501311)
文摘A side band power re-injection locked （SBPRIL） magnetron is presented in this paper. A tuning stub is placed between the external injection locked （EIL） magnetron and the circulator. Side band power of the EIL magnetron is reflected back to the magnetron. The reflected side band power is reused and pulled back to the central frequency. A phase-locking model is developed from circuit theory to explain the process of reuse of side band power in SBPRIL magnetron. Theoretical analysis proves that the side band power is pulled back to the central frequency of the SBPRIL magnetron, then the amplitude of the RF voltage increases and the phase noise performance is improved. Particle-in-cell （PIC） simulation of a 10-vane continuous wave （CW） magnetron model is presented. Computer simulation predicts that the frequency spectrum＇s peak of the SBPRIL magnetron has an increase of 3.25 dB compared with the free running magnetron. The phase noise performance at the side band offset reduces 12.05 dB for the SBPRIL magnetron. Besides, the SBPRIL magnetron experiment is presented. Experimental results show that the spectrum peak rises by 14.29% for SBPRIL magnetron compared with the free running magnetron. The phase noise reduces more than 25 dB at 45-kHz offset compared with the free running magnetron.
