Multivariable Digital Waveguides

The wave components of equations (16) travel undisturbed along each axis. This propagation is implemented digitally using $m$ bidirectional delay lines, as depicted in Fig. 1. We call such a collection of delay lines an $m$-variable waveguide section. Waveguide sections are then joined at their endpoints via scattering junctions (discussed in section IV) to form a DWN.

Figure: An $m$-variable waveguide section.