en yurtu78678468hgjn تخصصي Special پژوهشي Research nothing <p>&nbsp;<strong><i> Abstract </i></strong><strong>&mdash;This paper p r esents the experimental r esults on the generation of subgigawatt radio f r equency (RF) pulses using t w o types of nonlinear transmission lines (N L TLs). In the high- v oltage coaxial lines, we used the f oll o wing: 1) a periodic gas gap structu r e and 2) uni f ormly loaded saturated ferrite with axial bias. The concept of the first line is based on the in-phase composition of RF fields p r oduced by cur r ents in the periodic gas gap structu r e of the inner conducto r . The most stable and efficient nar r o w-band operation of the system with 12 cylindrical gas gaps (200 k V , </strong></p> <p>&nbsp;<strong> 18 ns) was r ealized at an RF of 1 GHz and an RF p o wer of s e v eral hund r eds of megawatts. The maximum p o wer co n v ersion r eached 10%. The second N L TL lacks spatial dispersion. The self- consistent dynamics of the tr a v eling w a v e is obse rv ed by cohe r ent magnetic switching in ferrites with axial bias. The pulsed v oltage dr iv er p r oduced 9-ns pulses of v oltage between 110 and 290 k V . W ith the optimum exte r nal magnetic field, the efficiency of ene r gy </strong></p> <p>&nbsp;<strong> co n v ersion was </strong><strong><i>&sim; </i></strong><strong>10%. </strong><strong>The peak p o wer of oscillations p r oduced on a r esist iv e load was </strong><strong><i>&sim; </i></strong><strong>700 </strong><strong>M W . An inc r ease in central f r equency </strong></p> <p>&nbsp;<strong> f r om 600 MHz to 1.1 GHz with incident pulse amplitude was </strong></p> <p>&nbsp;<strong> f </strong><strong>ound. </strong></p> 0 0 http://yektaweb.ir/modern01/browse.php?a_code=A-10-25-1&slc_lang=en&sid=1 ma ha sma.hashemi@yahoo.com 100319475328460046 100319475328460046 Yes dfgsdhstryr