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1. 发明申请

WO2012025946A1 TUNABLE BANDPASS FILTER 审中-公开
标题翻译： TUNABLE BANDPASS过滤器
公开(公告)号：WO2012025946A1
公开(公告)日：2012-03-01
申请号：PCT/IT2010/000375
申请日：2010-08-25
申请人： COMMSCOPE ITALY S.R.L. , TAMIAZZO, Stefano , RESNATI, Giuseppe
发明人： TAMIAZZO, Stefano , RESNATI, Giuseppe
IPC分类号： H03H7/12 , H01P1/203 , H01P11/00
CPC分类号： H01P1/20309 , H01P1/201 , H01P1/205 , H01P1/2086 , H01P7/04 , H01P11/00 , H01P11/007 , H03H7/0123 , H03H7/12 , H03H7/1791 , H03H2250/00 , Y10T29/49826
摘要： A bandpass filter has a combline structure having a plurality of cascaded nodes (503, 504, 506, 508 ). A plurality of nodes in the filter are connected both to resonant elements ( 514, 517 ) (a.k.a. resonators) and non-resonant elements ( 601, 604 ) (including elements having inductances and/or capacitances that do not resonate in a predetermined frequency band of interest). The resonant frequencies of the resonant elements may be adjusted, in order to adjust the location of the center frequency and/or the width of the passband of the filter. The characteristics of the resonant and non-resonant elements are selected such that the poles of the filter, when plotted on the complex plane, move substantially along the imaginary axis when the resonant frequencies are adjusted, without substantial movement along the real axis. The resulting bandpass filter has substantially constant losses and substantially constant absolute selectivity over a relatively wide range of bandwidths.
摘要翻译：带通滤波器具有具有多个级联节点（503,504,506,508）的组合结构。滤波器中的多个节点都连接到谐振元件（514,517）（又称谐振器）和非谐振元件（601,604）（包括具有在预定频带中不谐振的电感和/或电容的元件出于兴趣）。可以调节谐振元件的谐振频率，以便调节滤波器的中心频率的位置和/或通带的宽度。选择共振和非共振元件的特性，使得当绘制在复平面上时，滤波器的极点在谐振频率被调整时基本沿着虚轴移动，而不沿实际实质运动。所得到的带通滤波器在相对宽的带宽范围内具有基本恒定的损耗和基本上恒定的绝对选择性。

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