| Abstract: | A theory of a reversing multistrip coupler (RMSC) is presented based on a previously developed spectral theory of IDTs. It shows that the frequency dependence of the track-changing reflection of a SAW taking place in a RMSC, and the dependence of the reflection of the SAW from a periodic grating reflector are described by the same functions. The reflection of the SAW to the other channel is complete in a narrow frequency band of relative width (2/3) Δv/v if the RMSC is sufficiently long. Several expected applications of RMSCs are discussed, among them SAW dispersive filters, resonators, and low-loss filters. |
