Showing papers on "Coupled mode theory published in 1969"
TL;DR: In this article, the transfer of acoustic surface waves between two noncontacting surfaces by means of passive, co-directional piezoelectric coupling is achieved in LiNbO3.
Abstract: Transfer of acoustic surface waves between two noncontacting surfaces by means of passive, co‐directional piezoelectric coupling is achieved in LiNbO3. Minimum coupling loss is less than 3 dB. When the surfaces are maintained parallel, periodic variation of insertion loss with coupling length is observed. Measurements are in close agreement with predictions using coupled mode theory. A 100‐MHz delay line with a mechanically variable, nondispersive differential delay of 6.1 μsec and a total insertion loss less than 17 dB which utilizes this coupling mechanism is reported.
23 citations
01 Apr 1969
TL;DR: In this article, a coupled mode theory for a tapered cylindrical dielectric rod with a multimode taper, linear to first order in the taper angle, excited by the dominant HE 11 surface wave is presented.
Abstract: Surface wave propagation along a tapered cylindrical dielectric rod is described in the form of a coupled mode theory which includes the effects of the radiation field. Analytical results are presented for a multimode taper, linear to first order in the taper angle, excited by the dominant HE 11 surface wave.
6 citations
01 May 1969
TL;DR: In this article, the interaction of cyclotron beam modes with circuit modes was studied using a coupled-mode approach, and it was found that the interaction between the slow cycle mode with the fast cycle mode can lead to growth.
Abstract: Interaction of cyclotron beam modes with circuit modes is studied using a coupled-mode approach. It is found that the interaction of the slow cyclotron beam mode with the fast forward circuit mode can lead to growth. The instability experimentally observed also supports this hypothesis. Means are discussed for reducing the growth rate in order to improve the stability of a crossed-field amplifier.
4 citations
TL;DR: In this paper, the observation of two 55 Mn NMR modes in antiferromagnetic RbMnF 3 was reported, and the resonances were predicted to good accuracy by a coupled mode theory.
4 citations