Method and apparatus for a communications filter
    1.
    发明授权
    Method and apparatus for a communications filter 有权
    通信滤波器的方法和装置

    公开(公告)号:US07417517B2

    公开(公告)日:2008-08-26

    申请号:US11457238

    申请日:2006-07-13

    IPC分类号: H01P1/20

    CPC分类号: H01P1/203

    摘要: A method and apparatus for a highpass filter structure using transmission line construction which has multiple output tabs for selection of corner frequencies utilizing a plurality of resonators coupled to the transmission line. The transmission line has a characteristic impedance which increases exponentially with respect to a distance from the input.

    摘要翻译: 一种使用传输线结构的高通滤波器结构的方法和装置,其具有多个输出接头,用于利用耦合到传输线的多个谐振器来选择拐角频率。 传输线具有相对于距离输入的距离指数地增加的特性阻抗。

    Tunable bridged-T filter
    2.
    发明授权
    Tunable bridged-T filter 有权
    可调桥式T滤波器

    公开(公告)号:US06441701B1

    公开(公告)日:2002-08-27

    申请号:US09405099

    申请日:1999-09-22

    IPC分类号: H03H701

    CPC分类号: H03H7/0115 H03H7/1708

    摘要: A tunable filter (300) includes first (302) and second (304) “bridged-T” resonators. The first (302) and second (304) resonators are capacitively coupled together via bandwidth control/coupling section (306). A biasing section (314) provides the proper biasing and decoupling for the filter (300). Filter (300) provides for low-side injection mode operation, and provides for a very deep zero on the lower side of the passband resulting in excellent selectivity. Filter (300) provides for excellent selectivity while reducing the number of inductors and varactors needed in the filter circuit. A high side injection mode filter (500) similar to filter (300) is also described in the disclosure.

    摘要翻译: 可调谐滤波器(300)包括第一(302)和第二(304)“桥接T”谐振器。 第一(302)和第二(304)谐振器通过带宽控制/耦合部分(306)电容耦合在一起。 偏压部分(314)为过滤器(300)提供适当的偏置和去耦。 滤波器(300)提供低侧注入模式操作,并且在通带的下侧提供非常深的零,从而产生优异的选择性。 滤波器(300)提供优异的选择性,同时减少滤波器电路中所需的电感器和变容二极管的数量。 在本公开中还描述了类似于过滤器(300)的高侧喷射模式过滤器(500)。

    Electrically tunable band pass filter with symmetrical low-side and
high-side protection
    3.
    发明授权
    Electrically tunable band pass filter with symmetrical low-side and high-side protection 有权
    电可调式带通滤波器,具有对称的低边和高边保护

    公开(公告)号:US6097269A

    公开(公告)日:2000-08-01

    申请号:US241667

    申请日:1999-02-01

    IPC分类号: H03H7/01

    摘要: A tunable filter (400) provides dual injection mode operation over a continuously tunable frequency range (500). A combination of mirrored series resonant circuits (432, 446) tuned through varactors (434, 448) allows the frequency response to shift. The use of a series capacitor and shunted inductor (430, 428), (444, 442) mirrored onto each series resonator (432, 446) provides both high-side and low-side injection protection.

    摘要翻译: 可调滤波器(400)在连续可调频率范围(500)上提供双重注入模式操作。 通过变容二极管(434,448)调谐的镜像串联谐振电路(432,446)的组合允许频率响应移位。 使用镜像在每个串联谐振器(432,446)上的串联电容器和分流电感器(430,428),(444,442)可以提供高侧和低侧注入保护。

    METHOD AND APPARATUS FOR A COMMUNICATIONS FILTER
    4.
    发明申请
    METHOD AND APPARATUS FOR A COMMUNICATIONS FILTER 有权
    通信过滤器的方法和装置

    公开(公告)号:US20080012662A1

    公开(公告)日:2008-01-17

    申请号:US11457238

    申请日:2006-07-13

    IPC分类号: H01P1/203

    CPC分类号: H01P1/203

    摘要: A method and apparatus for a highpass filter structure using transmission line construction which has multiple output tabs for selection of corner frequencies utilizing a plurality of resonators coupled to the transmission line. The transmission line has a characteristic impedance which increases exponentially with respect to a distance from the input.

    摘要翻译: 一种使用传输线结构的高通滤波器结构的方法和装置,其具有多个输出接头,用于利用耦合到传输线的多个谐振器来选择拐角频率。 传输线具有相对于距离输入的距离指数地增加的特性阻抗。