V.Yu. Muchkaev – Ph.D.(Eng), Associate Professor, 

Department «Electronic Instruments and system engineering», Yuri Gagarin State Technical University of Saratov E-mail: muchkaev_vadim@mail.ru

V.A. Senchurov – Ph.D.(Eng), Associate Professor, 

Department «Electronic Instruments and system engineering», Yuri Gagarin State Technical University of Saratov E-mail: senchurov_v86@mail.ru

The results of researches of the electrodynamic properties of seven-beam triple gap resonator whose main frequency lies on K-band (f0 ≈ 18.5 GHz) and highest types of oscillations in millimeter frequency range wavelength are shown in this paper. In the examined resonator design one can reach multiple frequency ratio f 2 ≈ 37 GHz of the highest type of oscillations to the frequency of the main type of oscillations f0 ≈ 18.5 GHz (i.e. f2/f0 = 2) and also multiple frequency ratio f6 ≈ 55.5 GHz of the sixth highest mode of oscillations to the frequency of the dominant mode of oscillations f0 ≈ 18.5 GHz (f6/f0= 3). The examined triple gap resonator is generated electro-magnetically by coupled through two П-shaped coupling slots 1 and 2 by the prismatic resonance cavities 3, 4, 5. Seven communication channels are packed in common drift tube, whose radius is r1. Radius of each channel is r2 = 0.2 mm. Parameter values of h1 = h2 = h3 = 1 mm and r2 during the numerical calculations were not changed. During the calculations it was found that the frequency which is common to the doubled frequency of the main type of oscillations has the second highest type of oscillations and to the triple – the sixth one. Therefore later there were discussed two variants of resonator tuning. The first one – the resonator dimensions were changed so that one can achieve order of two frequencies of the second highest mode of oscillations f2 and the dominant mode of oscillations f0. The second variant – the resonator was tuned so that one can achieve order of three frequencies of the sixth highest mode of oscillations f6 and the dominant mode of oscillations f0. The calculation results of the field distribution, mentioned types of oscillations could interact simultaneously with the beam. This type of mode can be used for creating the effective frequency multipliers for radiation generation in millimeter range.

1. Tonouchi M. Cutting-edge terahertz technology. Nature Photonics 2007. V. 1. P. 97−105.
2. Taylor Z.D., Singh R.S., Bennett D.B. et al. THz medical imaging: in vivo hydration sensing. IEEE Transactions of Terahertz Science and Technology. 2011. V. 1. № 1. P. 201−219.
3. Senchurov V.A., Muchkaev V.Yu. Issledovanie elektrodinamicheskikh svoistv chetyrekhzazornogo rezonatora W-diapazona. Radiotekhnika. 2017. № 7. S. 70−75. (in Russian)
4. Ruey-Jen Hwu, Derrick K. Kress, Sam V. Judd, Jordan M. Krebs, Larry P. Sadwick. 81−86 GHz E-band 90 Watts High Power Traveling Wave Tubes. IEEE IVEC. 2016. P. 515−516.
5. Belov K.V., Karetnikova T.A., Ploskikh A.E., Ryskin N.M., Torgashov G.V. Umnozhitel diapazona 0,2 TGts s lentochnym elektronnym puchkom. Radiotekhnika. 2017. № 7. S. 19−23. (in Russian)
6. Fan J.; Wang Y. A 14 kW High-Power X-Band to Ka-Band Klystron Frequency Multiplier. IEEE Transactions on Electron Devices. 2014. V. 61. № 6. P. 1854−1858.
7. Senchurov V.A., Muchkaev V.Yu. Elektrodinamicheskie kharakteristiki mnogoluchevogo dvukhzazornogo rezonatora millimetrovogo diapazona. Radiotekhnika. 2017. № 2. S. 99−103. (in Russian)
8. Muchkaev V.Yu., Senchurov V.A., Tsarev V.A. Elektrodinamicheskie parametry trekhzazornogo rezonatora s dvumya raznesennymi puchkami. Materialy Mezhdunar. nauchno-tekhnich. konf. «Aktualnye problemy elektronnogo priborostroeniya». Saratov. 2016. T. 1. S. 343−349. (in Russian)
9. Lebedev I.V. Tekhnika i pribory sverkhvysokikh chastot. Izd. 2-e. T. 2. M.: Vysshaya shkola. 1972. (in Russian)
10. Svidetelstvo ob ofitsialnoi registratsii programmy dlya EVM. № 2011611748 ot 24.02.2011. Muchkaev V.Yu., Tsarev V.A. (in Russian)
11. Grigorev A.D., Yankevich V.B. Rezonatory i rezonatornye zamedlyayushchie sistemy SVCh. Chislennye metody rascheta i proektirovaniya. M.: Radio i svyaz. 1984. (in Russian)
12. George Caryotakis High Power Klystrons: Theory and Practice at the Stanford Linear Accelerator Center. 2005.