Waveguide‐based combining S‐band high power microwaves

Abstract

Incoherent power combining system is a promising technique for enhancing the output power level of narrow‐band high‐power microwave devices, and waveguide‐based combiner usually has the virtues of high transmission efficiency, proper bandwidth and high power‐handling capacity within a compact structure. A specific cross‐junction combiner is proposed for combining the S/S band microwave beams, and the detailed simulation and experimental results are presented. The investigations show that the combiner realises integration of GW level power combination and mode conversion from two microwave sources simultaneously.

Circular sectoral waveguide TM01 to TE11 mode converter

“…At 1‐atm air pressure is used as a medium, the maximum electric field inside the mode converter is 93.3 kV/mm, as shown in Figure . The field values are within the breakdown limit of 100 kV/mm . Therefore the proposed mode converter has the ability to use for HPM systems at mega‐watt level.…”

“…The field values are within the breakdown limit of 100 kV/mm. 6,10 Therefore the proposed mode converter has the ability to use for HPM systems at mega-watt level.…”

Compact circular waveguide TM 02 ‐TE 11 mode converter

“…HPM source plays an important role in HPM systems. The relativistic backward-wave oscillators (RBWOs), which are considered as one of the most promising HPM generators, have attracted more and more attention [3][4][5][6][7][8][9][10]. RBWOs operating in L-, S-, and C-bands often select TM 01 circular waveguide (Cir.TM 01 ) as an operation mode.…”