Compensated directional coupler
作者： Conrad E. Nelson , Bernard H. Geyer , S. Wayne Kenyon
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摘要: Transmission line directional coupler directivity is improved by providing compensation for even and odd mode phase velocity differences. Teeth are added to the edges of electrodes remote from coupling region separating electrodes, so that waves made similar over a wide frequency band. The approach applicable both suspended substrate stripline type couplers, where uncompensated less than velocity.
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