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Active surface-wave directional coupler
Authors:Davis   K.L. Newhouse   V.L. Lee   C.W. Gunshor   R.L.
Affiliation:Purdue University, School of Electrical Engineering, Lafayette, USA;
Abstract:We report experimental results which show that noncollinear surface-wave mixing on [111]-cut bismuth?germanium oxide can be used to realise an active, switchable directional coupler. For low-level inputs, the coupling is enhanced by as much as 20 dB by a semiconductor placed over the interaction region. The directivity is found to be greater than 40 dB.
Keywords:
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