Accession Number:

AD0731866

Title:

Microwave Network Approach to Guided Acoustic Surface Wave Structures.

Descriptive Note:

Final rept. 1 Jul 69-31 Dec 70,

Corporate Author:

POLYTECHNIC INST OF BROOKLYN FARMINGDALE N Y DEPT OF ELECTROPHYSICS

Personal Author(s):

Report Date:

1971-08-01

Pagination or Media Count:

246.0

Abstract:

In addition to the formulation of a rigorous network approach to acoustic wave problems in solid and fluid media, equivalent networks have been derived for a large number of interfaces between different media. These networks are reported in a fashion which resembles a catalog of acoustic wave phenomena expressed in microwave network terms. These microwave network approaches were then applied to a variety of important current problems in microwave acoustics. One such problem is that of the step junction between plated and unplated regions of a substrate. An equivalent network has been derived for this step junction using a general theoretical approach for the approximate analysis of the network elements describing transverse discontinuities and junctions. The reflection and transmission properties of the step junction revealed some interesting features which served as the basis for several proposed novel devices, such as a narrowband in-line filter, a frequency selector, and a thickness monitor. Three structures were analyzed by means of the microwave network approach, and numerical results were obtained for the propagation characteristics. The results for the thin-ribbon and gap waveguides were compared with other available theoretical data and with available experimental information, and directional couplers for both of these guide types were analyzed. Author

Subject Categories:

  • Acoustics
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE