Title :
Experimental study on hundreds of MW at X-band for relativistic backward wave oscillator (RBWO)
Author :
Min, S.H. ; Jung, H.C. ; Park, G.S. ; An, J.H. ; Lee, S.H. ; Yoon, Y.J. ; Kim, J.Y. ; Choi, J.H. ; So, J.H.
Author_Institution :
Dept. of Phys. & Astron., Seoul Nat. Univ., Seoul, South Korea
Abstract :
BWO-circuit was designed to generate hundreds MW electromagnetic wave on X-band in this study. A RF coupler is designed and fabricated to measure the power of an electromagnetic wave which is generated in the slow wave structure of a relativistic backward wave oscillator (RBWO) before this wave is radiated through an antenna. To pickup about -63 dB of total output power and avoid a RF breakdown in this coupler, a 2 mm times 5 mm slot is made in a cylindrical waveguide. This coupler is installed before the radiation antenna and the measured value is compared with the power which is measured after the radiation. In the end, the radiation pattern was identified by using of fluorescent lamps.
Keywords :
antenna radiation patterns; backward wave oscillators; microwave generation; microwave oscillators; slow wave structures; waveguide couplers; BWO-circuit; MW electromagnetic wave; RF coupler; RF radiation pattern; X-band; cylindrical waveguide; electromagnetic wave generation; fluorescent lamps; high-power microwave radiation; relativistic backward wave oscillator; slow wave structure; Antenna measurements; Electric breakdown; Electromagnetic coupling; Electromagnetic measurements; Electromagnetic scattering; Electromagnetic waveguides; Oscillators; Power generation; Power measurement; Radio frequency; COBRA; High Power Microwave; RBWO; RF coupler;
Conference_Titel :
Vacuum Electronics Conference, 2009. IVEC '09. IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-3500-5
Electronic_ISBN :
978-1-4244-3501-2
DOI :
10.1109/IVELEC.2009.5193359
