Title :
Active surface-wave directional coupler
Author :
Davis, K.L. ; Newhouse, V.L. ; Lee, Chul Wook ; Gunshor, R.L.
Author_Institution :
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 :
acoustic surface wave devices; bismuth compounds; directional couplers; Bi12GeO20; acoustic surface wave devices; directional couplers;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19730146
