Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2020. No. 4
ContentsFull text in Russian (pdf)
Russian page
DOI 10.30898/1684-1719.2020.4.15
UDC 621.385.632.1
Technique of designing TWTO with high technical efficiency
Yu.N. Scherbakov
SC "NPP Almaz", Panfilova 1, Saratov 410033, Russia
The paper is received on Februry 20, 2020, fter correction - on March 30, 2020
Abstract. The design technique for achieving a high technical efficiency of TWTO is described. The proposed method is based on the assigning the law of change of phase difference of the grouped beam current and the electromagnetic wave along the device with the subsequent synthesis of the helix pitch of the slow-wave system.
The dependence of the phase difference between the electromagnetic wave and the beam current along the longitudinal coordinate has the form of a constant for the input section of the TWT and has the form of a two-segment broken for the output section. The phase difference of the fields and currents at the ends of the broken line was taken to be equal to π radians and varied at the middle point.
The results of application of the methodology for TWTO with operating frequency 11, 18, 25 GHz are presented. It is shown that the proposed methodology allows designing the TWTO with an efficiency of more than 63% in all considered frequency ranges by balancing the following parameters: electronic efficiency, RF-loss power, left border of the energy spectrum of the spent beam. Shortage of electronic efficiency by 2.9, 9.0 and 2.8% gave a gain in total efficiency by 5.9, 14,7 è 9,8% for 11, 18, 25 GHz, respectively. The technique allows for a simple choice of a compromise solution between high technical efficiency and high electronic efficiency of the device. The level of the calculated amplitude-phase characteristic in the case of optimization by technical efficiency does not exceed 4.0 deg/dB, which is significantly less than in the case of optimization by electronic efficiency, when this parameter reaches 6.5 for the 18 GHz device.
Key words: TWTO, efficiency, helical TWT, helical pitch, synthesized law of the helix pitch.
References
1. Shalaev P.D., Scherbakov Yu.N. The program of calculation and optimization of the TWTO interaction space parameters. Radiotehnika - Radioengineering. 2017. No. 7. P. 48-52. (In Russian)
2. Shalaev P.D., Scherbakov Yu.N. Synthesis of the quasi-optimal pitch variation law for helical TWT. Proceedings of the International Scientific-Tech. Conf. Aktualnyje problemy elektronnogo priborostroeniya. - Actual problems of electronic instrument engineering. Saratov, Nauka Publ. Center. 2018. P.155-160. (In Russian)
3. Yu. N. Scherbakov. Increasing the electronic efficiency of the Ku- and K-band TWTO. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2019. No. 3. Available at http://jre.cplire.ru/jre/mar19/9/text.pdf
DOI 10.30898/1684-1719.2019.3.94. Shalaev P.D. The results of the development of the average power TWT in the 3-centimeter range with an efficiency up to 69%. Proceedings of the International Scientific-Tech. Conf. Pespektivy razvitiya elektroniki i vakuumnoy tehniki na period 2001-2006 gg. - Perspective of development of electronics and vacuum technology for the period 2001-2006. Saratov, GNPP "Contact". Saratov University Press. 22 – 23 February 2001. P. 62- 67. (In Russian)
For citation:
Scherbakov Yu.N. Technique of designing TWTO with high technical efficiency. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2020. No. 4. Available at http://jre.cplire.ru/jre/apr20/15/text.pdf. DOI 10.30898/1684-1719.2020.4.15