17 GHz Photonic Band Gap Cavity with Improved Input Coupling
17 GHz Photonic Band Gap Cavity with Improved Input Coupling
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DOI：
10.1103/physrevstab.4.042001
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发表时间：
2001-05
影响因子：
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通讯作者：
M. Shapiro;W. Brown;I. Mastovsky;J. Sirigiri;R. Temkin
中科院分区：
文献类型：
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作者：
M. Shapiro;W. Brown;I. Mastovsky;J. Sirigiri;R. Temkin
我们提出了一个17 GHz的光子带隙（PBG）腔的理论设计和冷测试与改善耦合从外部矩形波导。光子带隙腔由金属棒的三角形晶格组成，中心有一个缺陷（缺棒）。选择${\mathrm{TM}}_{010}$类缺陷模式作为工作模式。实验结果表明，临界耦合到腔中可以实现部分退出或删除的一些杆从晶格，结果与模拟一致。的PBG加速器结构的详细设计相比，与传统的（药盒）腔。PBG腔的一个优点是其谐振频率比可比较的药盒腔中的谐振频率更少地受到输入/输出耦合结构的扰动。PBG结构对于未来的加速器应用是有吸引力的。
We present the theoretical design and cold test of a 17 GHz photonic band gap (PBG) cavity with improved coupling from an external rectangular waveguide. The PBG cavity is made of a triangular lattice of metal rods with a defect (missing rod) in the center. The ${\mathrm{TM}}_{010}$-like defect mode was chosen as the operating mode. Experimental results are presented demonstrating that critical coupling into the cavity can be achieved by partial withdrawal or removal of some rods from the lattice, a result that agrees with simulations. A detailed design of the PBG accelerator structure is compared with a conventional (pillbox) cavity. One advantage of the PBG cavity is that its resonance frequency is much less perturbed by the input/output coupling structure than in a comparable pillbox cavity. The PBG structure is attractive for future accelerator applications.