Microwave Network Synthesis
Semiannual rept. 1 Feb-31 Jul 1972,
STANFORD RESEARCH INST MENLO PARK CA
Pagination or Media Count:
The results of a theoretical and experimental study of the grating transducer are presented. The results clearly demonstrate that such a structure can couple effectively to surface acoustic waves. However the study has revealed two problem areas 1 It is difficult to prevent the parasitic capacitance to ground from dominating the electrical behavior of such transducers, and 2 the electric fields that jump over between nonadjacent electrodes can couple to surface waves and bulk waves and therefore must be taken into account in a transducer design. A possible method for improving the transducer design is discussed. A compact channel-dropping-filter geometry consisting of hairpin bandpass and folded-line bandstop filters is proposed for stripline and MIC microwave integrated circuits. Design details and theoretical and experimental data for a trial channel-dropping filter are presented.
- Line, Surface and Bulk Acoustic Wave Devices