Gigawatt-level circularly polarized radiation was transmitted using a coaxial beam rotating antenna in an X-band relativistic backward wave oscillator. The mode conversion from the TM01 mode to the circularly polarized TE11 -like mode was experimentally and numerically shown. The simulated radiation pattern was in good agreement with the measured radiation pattern.
Bibliographical noteFunding Information:
We have demonstrated the power transmission of a gigawatt-level circularly polarized TE 11 -like mode using a beam-rotating mode converter from the X-band RBWO. The mode conversion from the doughnut shaped TM 01 mode to the circularly polarized TE 11 -like mode is shown both experimentally and numerically in the high field environment of ∼ MV / m with a minimal loss of −10.5 dB. Such a compact antenna which can reduce the probability of breakdown or serious loss of output power would be very effective for the application of HPEM devices. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (No. 2009-0083512).
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)