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TM0n0 - and TMm10 - Mode Oversized Cylindrical Cavity Power Combiners

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2 Author(s)

TMm10 -mode power combining is treated in addition to conventional TM0n0-mode combining in a multiple-device oversized cylindrical cavity having a window output structure. Mode analysis gives the condition for stable power-combining operation in the desired mode. By experiments both on TM0n0 -mode combining (n = 2, 3, and 4) and on TMm10 -mode combining (m = 2 and 8), it is shown that almost perfect power combining in the TM210 mode can be achieved as in the TM020 mode and that the power combining efficiency decreases gradually with increasing n or m. A possible advantage of TMm10 -mode combining in an oversized cavity is suggested based on the experimental result that power combining in the TM810 mode gives higher efficiency than in the TM040 mode.

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IEEE Transactions on Microwave Theory and Techniques  (Volume:35 ,  Issue: 9 )