Invention Grant
US08525620B2 BAW resonator filter bandwidth and out-of-band frequency rejection 有权
BAW谐振器滤波器带宽和带外频率抑制

BAW resonator filter bandwidth and out-of-band frequency rejection
Abstract:
Embodiments of the present invention provide systems, devices and methods for improving both the bandwidth of a BAW resonator bandpass filter and the suppression of out-of-band frequencies above the passband. In various embodiments of the invention, blocker inductors are located in series between the filter input and the filter output to realize both bandwidth enhancement and improved out-of-band frequency rejection. For example, a first blocker inductor may be located at the input and a second blocker inductor may be located at the output of a BAW resonator bandpass filter.
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