| 摘要 |
A filter (500) including a first resonator (505) coupled in shunt with a first port (507), a first bridging network (510) coupled between the first port (507) and a first node (509), a second resonator (515) coupled in shunt with the first node (509) and a second port (547) coupled to the first node (509). The first (505) and second (515) resonators each include acoustic resonators (15) and the first bridging network (510) has an electrical length THETA at a frequency omega in a system having a characteristic admittance Y in accordance with omega Co=Ycot THETA where Co is a shunt capacitance including the clamping capacitance of the first resonator (505) and omega is a center frequency of the filter (500).
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