Patent ID: 8701065
Filing Date: 2014-04-15
Classification: G06F,H03H

Abstract:
1. A method of designing an acoustic microwave filter in accordance with frequency response requirements, comprising: selecting a filter section based on the frequency response requirements, wherein the filter section includes an input, an output, and a plurality of circuit elements between the input and the output, the plurality of circuit elements having a paired in-line acoustic resonator and in-shunt acoustic resonator, and further having at least one of an additional in-line acoustic resonator and in-shunt resonator; selecting a value for each of the circuit elements based on the frequency response requirements; selecting a number of filter sections based on the frequency response requirements, each of the filter sections including an input and an output; cascading the selected number of filter sections to create a cascaded filter circuit design, such that the inputs of at least one pair of immediately adjacent filter sections are connected to each other or the outputs of at least one pair of immediately adjacent filter sections are connected to each other; adding parasitic effects to the cascaded filter circuit design to create a pre-optimized filter circuit design; inputting the pre-optimized filter circuit design into a filter optimizer to create a final filter circuit design; and fabricating an actual acoustic microwave filter based on the final filter circuit design.