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发明授权
CN1921304B 滤波器以及天线分波器 有权 转让

滤波器以及天线分波器
摘要：
本发明提供了一种滤波器以及天线分波器。本发明的课题是提供可小型化并且可以提高设计自由度的滤波器以及天线分波器。作为解决手段，本发明的滤波器、天线分波器和分波器的特征在于，具有：第1谐振子；第2谐振子(S31)，其与第1谐振子相比减低了激励效率；以及电感器(L31)，其与第2谐振子(S31)并联连接。根据本发明，可以减小为了改善衰减特性而在谐振子上附加的电感器，可削减安装面积。并且，可任意地设定2个反谐振点。
摘要（英）：

The invention provides a filter and an antenna branching filter which can be made compact or improved in degree of freedom of design. The filter is equipped with a first resonator, a second resonator(S31) which is made less in excitation efficiency than the first resonator, and an inductor (L31) connected to the second resonator (S31) in parallel, and the antenna branching filter and a branchingfilter. Inductance added to the resonators to improve attenuation characteristics can be made small and the mount area is reducible. Alternatively, two antiresonance points can optionally be set.

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