Yuan-Qiang Yu(于元强)1, Yu-Wei Fan(樊玉伟)2, †, and Xiao-Yu Wang(王晓玉)2$
1 Air Early Warning Academy, Wuhan 430014, China 2 College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
Complex magnetically insulated transmission line oscillator (MILO), as an important development direction, can enhance the power efficiency and generate dual-band high power microwaves (HPMs). A complex MILO and a preliminary dual-band radiation system have been proposed in our previous studies. However, the axial length of the dual-band radiation system is too long to meet the compact requirements. In this paper, a compact dual-band radiation system is presented and investigated numerically. The compact dual-band radiation system comprises a dual-band cross-shaped mode converter and a dual-band coaxial conical horn antenna. It can convert two coaxial TEM mode microwaves (1.717 GHz and 4.167 GHz) generated by the complex MILO into the coaxial TE11 mode microwaves, and then radiate them into the air. At 1.717 GHz, the gain of the antenna is 17.9 dB, and the total return loss and diffraction loss are 1.50% and 0, respectively. At 4.167 GHz, the gain is 19.4 dB, and the total return loss and diffraction loss are 1.17% and 0.78%, respectively. The power handling capacity of the antenna is 5.1 GW at 1.717 GHz and 2.0 GW at 4.167 GHz. Comparing with the original structure, the length of the dual-band radiation system is reduced by 45.2%.
Yuan-Qiang Yu(于元强), Yu-Wei Fan(樊玉伟), and Xiao-Yu Wang(王晓玉)$ A compact dual-band radiation system 2020 Chin. Phys. B 29 118402
Fig. 1.
Preliminary dual-band radiation system.
Fig. 2.
Structure of compact dual-band radiation system.
Fig. 3.
Electric field distribution at (a) 1.717 GHz and (b) 4.167 GHz in dual-band mode converter.
Fig. 4.
Mode power fraction of mode converter at (a) 1.717 GHz and (b) 4.167 GHz.
Fig. 5.
Radiation patterns at (a) 1.717 GHz and (b) 4.167 GHz of dual-band radiation system.
Fig. 6.
Rreturn loss and diffraction loss at (a) 1.717 GHz and (b) 4.167 GHz of dual-band radiation system.
Fig. 7.
Schematic diagram of E-plane position of the dual-band radiation system.
Fig. 8.
Electric field at (a) 1.717 GHz and (b) 4.167 GHz of E-plane in dual-band radiation system.
[1]
Calico S E, Clark M C, Lemke R W, Scott M C 1995 SPIE’s 1995 International Symposium on Optical Science, Engineering, and Instrumentation July 9–14, 1995 San Diego, CA, USA 50 DOI: 10.1117/12.218591
[2]
Haworth M D, Cartwright K L, Luginsland J W, Shiffler D A, Umstattd R J 2002 IEEE Trans. Plasma Sci.30 992 DOI: 10.1109/TPS.2002.801550
[3]
Lemke R W, Calico S E, Clark M C 1997 IEEE Trans. Plasma Sci.25 364 DOI: 10.1109/27.602513
[4]
Fan Y W, Wang X Y, Zhong H H, Zhang J D 2015 Appl. Phys. Lett.106 093501 DOI: 10.1063/1.4913932
Fan Y W, Zhong H H, Li Z Q, Shu T, Yang H W, Yang J H, Wang Y, Luo L, Zhao Y S 2008 Chin. Phys. B17 1804 DOI: 10.1088/1674-1056/17/5/042
[7]
Haworth M D, Allen K E, Baca G, Benford J N, Englert T J, Hackett K E, Hendricks K J, Henley D M, Lemke R W, Price D, Ralph D R, Sena M D, Shiffler D A, Spencer T A 1997 Optical Science, Engineering and Instrumentation ’97, July 27–August 1,1997 San Diego, CA, USA 28 DOI: 10.1117/12.279433
[8]
Haworth M D, Baca G, Benford J, Englert T, Hackett K, Hendricks K J, Henley D, LaCour M, Lemke R W, Price D, Ralph D, Sena M, Shiffler D, Spencer T A 1998 IEEE Trans. Plasma Sci.26 312 DOI: 10.1109/27.700759
[9]
Haworth M D, Englert T J, Hendricks K J, Lemke R W, Luginsland J W, Shiffler D S, Spencer T A 2000 Rev. Sci. Instrum.71 1539 DOI: 10.1063/1.1150500
[10]
Fan Y W, Zhong H H, Li Z Q, Shu T, Zhang J D, Zhang J, Zhang X P, Yang J H, Zhang J, Luo L 2007 J. Appl. Phys.102 103304 DOI: 10.1063/1.2817254
[11]
Fan Y W, Zhong H H, Shu T, Li Z Q 2008 Phys. Plasmas15 083108 DOI: 10.1063/1.2976168
[12]
Ju J C, Fan Y W, Zhong H H, Shu T 2009 IEEE Trans. Plasma Sci.37 2041 DOI: 10.1109/TPS.2009.2027603
[13]
Fan Y W, Zhong H H, Li Z Q, Yuan C W, Shu T, Yang H W, Wang Y, Luo L 2011 IEEE Trans. Plasma Sci.39 540 DOI: 10.1109/TPS.2010.2086492
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