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发明公开
CN102763265A 电滤波器 无效 - 撤回

电滤波器
摘要：
一种用于对电信号进行滤波的电滤波器，该滤波器具有包括在带边沿过渡频率处的带边沿的传输特性，该滤波器包括：环形器，具有用于接收要被滤波的信号的第一环形器端口，该环形器适用于将在第一环形器端口处接收到的信号传送到第二环形器端口，并且还适用于将在第二环形器端口处接收到的信号传送到第三环形器端口；以及连接到第二端口的反射模式滤波器；该反射模式滤波器包括：包括至少一个谐振器的滤波器网络，该滤波器网络具有连接到第二环形器端口的网络输入；以及连接到网络输入的另一谐振器，该另一谐振器被配置为提供提取的极点，该提取的极点提供最接近带边沿过渡频率的传输零点；其中，与滤波器网络的至少一个谐振器中的至少一个的低Q相比，该另一谐振器具有高Q。
摘要（英）：

An electrical filter for filtering an electrical signal, the filter having a transmission characteristic comprising a band edge at a band edge transition frequency, the filter comprising a circulator having a first circulator port for receiving a signal to be filtered, the circulator being adapted to transfer a signal received at the first circulator port to a second circulator port and being further adapted to transfer a signal received at the second circulator port to a third circulator port; and, a reflection mode filter connected to the second port; the reflection mode filter comprising a filter network comprising at least one resonator, the filter network having a network input connected to the second circulator port; and, a further resonator connected to the network input, the further resonator being arranged to provide an extracted pole providing a transmission zero closest to the band edge transition frequency; wherein the further resonator has a high Q compared to the low Q of at least one of the at least one resonator of the filter network.

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