A Novel highly accurate synthetic technique for determination of the dispersive characteristics in periodic slow wave circuits
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Date
1992-11Author
Guo, Hezhong
Carmel, Yuval
Lou, Weiran
Chen, Leemian
Rodgers, John
Abe, David
Bromborsky, A.
Destler, William
Granatstein, Victor
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Show full item recordAbstract
A novel, highly accurate (0.1-0.5%) synthetic technique
for determining the complete dispersive characteristics
of electromagnetic modes in a spatially periodic structure is
presented. It was successfully applied for the cases of the fundamental
(TMo,,$ as well as higher order (TM0(*)T, Mo(3,)p assband
modes in a corrugated waveguide. This structure is commonly
used in relativistic backward wave oscillators, traveling
wave tubes, extended interaction oscillators and a variety of
multiwave Cerenkov generators. An appropriately shorted periodic
structure resonates at specific frequencies. To accurately
and unambiguously measure these frequencies we used unique
antenna radiators to excite pure modes in the circuit under test.
An analytical technique to derive the complete dispersion relation
using the experimentally measured resonances is presented.
This technique, which is based on the intrinsic characteristics
of spatially periodic structures, is applicable to slow
wave structures of arbitrary geometry.
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