Study of Traveling Wave Tube With Folded-Waveguide Circuit Shielded by Photonic Crystals

• Published in: IEEE transactions on electron devices Vol. 57; no. 5; pp. 1137 - 1145
• Main Authors: Gong, Yubin, Yin, Hairong, Wei, Yanyu, Yue, Lingna, Deng, Mingjin, Lu, Zhigang, Xu, Xiong, Wang, Wenxiang, Liu, PuKun, Liao, FuJiang
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.05.2010; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Arrays; Circuit properties; Circuits; Computer simulation; Cutoff frequency; Electric, optical and optoelectronic circuits; Electromagnetic scattering; Electronic circuits; Electronic tubes, masers; Electronics; Exact sciences and technology; Folded waveguide (FW); Frequency filters; Fundamental areas of phenomenology (including applications); Gain; Impedance; Materials; Metals; Optical materials; Optics; Oscillators; Photonic band gap; Photonic bandgap materials; Photonic crystals; photonic crystals (PhC); Physics; slow-wave structure (SWS); Stability; Traveling wave tubes; travelling-wave tube (TWT); Walls; Performance evaluation; slow-wave structure (SWS); Output power; Electronic filters; Travelling wave tube; photonic crystals (PhC); Waveguide; Photonic crystal; Slow wave structure; travelling-wave tube (TWT); Impedance; Folded waveguide (FW); Gain
• ISSN: 0018-9383; 1557-9646
• DOI: 10.1109/TED.2010.2043176

The design and simulated performance of a traveling-wave tube (TWT) constructed by combining a folded-waveguide (FW) slow-wave circuit with arrays of 2-D photonic crystals (PhC) are presented. Numerical results reveal that the Pierce interaction impedance of the FW circuit with PhCs is similar to the circuit without PhC arrays. The gain, output power, and efficiency of TWTs with and without PhCs are also similar when the circuit dimensions are identical; however, the TWT with PhCs can filter out nonoperating modes, which may improve the stability of the circuit shielded with PhCs when compared to the same circuit shielded by metal walls.