An important stage in the creation of SAW devices is the modeling of its design
providing required electrical parameters. This task can be solved within the context of a device
design synthesis problem. Here, requirements are set for the electrical parameters, on the basis
of which the design of the device is simulated. The simulation allows for selecting other design
parameters, among which are the materials of the piezoelectric and IDT, the number of
electrodes and their thickness in the IDT, etc. Since a number of SAW filter designs with
specific design parameters are currently used, the task seems to be over-complicated and is not
considered here.
The presented method assumes device simulation based on its electrical characteristics for the
given design parameters of the selected filter type. This approach offers an analysis of the
selected type of device design (irrelevant to the reasons for its choice) to predict its design
parameters based on simulation of its electrical characteristics for different values of its design
parameters. Obviously, based on the described method, it is also possible to build algorithms
for device synthesis, e.g. within the context of electrical parameters optimization problem of
the device with selected design type.
The problem of filter topology synthesis is investigated for only one type of ladder SAW filter.
The described method can be used to construct algorithms for the synthesis of various SAW
filter types.
Keywords: Bulk mode, Circuit theory, Green's function, Interdigital converter, Numerical methods, P-matrix, Reflection, SAW filter, Transmission and transformation, Transducer.
