Effect of Oblique Misalignment in a 9GHz Open Coaxial Resonator

Abstract:

The effect of inner-rod oblique misalignment in a 9-GHz open coaxial resonator is studied by means of the software CST microwave studio. Results show that the oblique eccentric between the inner rod and outer wall have substantial influences on the field profile, resonant frequency, and Q factors of an open coaxial resonator. And the oblique misalignment has more serious effect than the parallel misalignment. So in the practical of engineering applications, we should try to avoid the occurrence of eccentric between the inner rod and outer wall during to technological factors.

• Periodical: Applied Mechanics and Materials (Volume 392)
• Pages: 461-465
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.392.461
• Online since: September 2013
• Authors: Yong Chao Xie, Tong Liu
• Keywords: Field Profile, Oblique Misalignment, Open Coaxial Resonator, Q Factors, Resonant Frequency

References

[1] Chien Lun Hung and Yisheng Yeh, Spectral domain analysis of coaxial cavities, International Journal of Infrared and Millimeter Waves, Vol. 24, No. 12, December (2003).

DOI: 10.1023/b:ijim.0000009758.76835.1f

[2] C. L. Hung, Y. C. Tsai, and K. R. CHU, A Study of Open-End Cavities by the Field-Energy Method., IEEE TRANSACTIONS ON PLASMA, VOL. 26, NO. 3, JUNE (1998).

DOI: 10.1109/27.700874

[3] S. C. Zhang and M. Thumm: Structural eccentricity effect on output power of a coaxial-cavity gyrotron oscillator, Int. J. Infrared and Millimeter Waves, vol. 20, no. 7, pp.1271-1276, (1999).

[4] S. C. Zhang and M. Thumm: Gyrokinetic description of the structural eccentricity influence on the starting current of a coaxial-cavity gyrotron, Physics of Plasmas, vol. 6, no. 5, pp.1622-1626, (1999).

DOI: 10.1063/1.873415

[5] S. C. Zhang and M. Thumm: Eigenvalue equations and numerical analysis of a coaxial cavity with misaligned inner rod, IEEE Trans. Microwave Theory Tech, vol. 48, no. 1, pp.8-14, (2000).

DOI: 10.1109/22.817466

[6] Ying-XIn Lai, Hui –Bo Zhang and Shi-Chang Zhang, Calculation Approach of the RF-Field Distribution in an Eccentrically Coaxial Cavity, APMC2005 Proceedings0-7803-9433.

DOI: 10.1109/apmc.2005.1606606

[7] Hui –Bo Zhang, Ying-XIn Lai, and Shi-Chang Zhang, Eigenfrequcy analysis of a coaxial cavity with large eccentricity, APMC2005 Proceedings0-7803-9433.

DOI: 10.1109/apmc.2005.1607017

[8] Computer Simulation Technology (CST), User, s Manual 5, inCST-Microwave.

[9] Piosczyk B, Dammertz G, Dumbrajs O, et al., A 2-MW, 170-GHz coaxial cavity gyrotron, IEEE Trans. Plasma Sci. Vol. 32, 413-417(2004).

DOI: 10.1109/tps.2004.827605

[10] Idehara T, Ogawa I, Mitsudo S, et al, A high harmonic gyrotron with an axis-encircling electron beam and a permanent magnet, IEEE Trans. Plasma Sci, Vol. 32, NO. 3, 903-909 (2004).

DOI: 10.1109/tps.2004.827614