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US08648674B2 Filter circuit, and wireless communication module and wireless communication device that uses the same 有权
滤波电路，无线通信模块和使用相同的无线通信设备

Filter circuit, and wireless communication module and wireless communication device that uses the same
摘要：
A filter circuit having two pass bands includes first and second bandpass filters which are connected in parallel with each other. Each of the bandpass filters includes at least a resonator group composed of a plurality of resonators arranged in orderly sequence so as to be coupled to each other to form a pass band, an input terminal coupled to a resonator on an input stage, and an output terminal coupled to a resonator on an output stage. The resonator group is composed of at least one of one or more quarter-wavelength resonators and one or more half-wavelength resonators. The resonator group of at least one of the first bandpass filter and the second bandpass filter includes both one or more quarter-wavelength resonators and one or more half-wavelength resonators.
摘要（中）：

具有两个通带的滤波器电路包括彼此并联连接的第一和第二带通滤波器。 每个带通滤波器至少包括由有序排列的多个谐振器组成的谐振器组，以便彼此耦合以形成通带，连接到输入级上的谐振器的输入端和输出端 端子耦合到输出级上的谐振器。 谐振器组由一个或多个四分之一波长谐振器和一个或多个半波长谐振器中的至少一个组成。 第一带通滤波器和第二带通滤波器中的至少一个的谐振器组包括一个或多个四分之一波长谐振器和一个或多个半波长谐振器。

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