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    • 54. 发明授权
    • Fixed and varactor-tuned bandstop filters with spurious suppression
    • 固定和变容二极管调谐带阻滤波器,具有杂散抑制
    • US08912868B1
    • 2014-12-16
    • US13554592
    • 2012-07-20
    • Andrew C. Guyette
    • Andrew C. Guyette
    • H01P1/203H01P7/08
    • H01P1/203H01P1/20336H01P7/088
    • A bandstop filter configured to suppress a spurious resonance frequency includes a resonator and a transmission line that is coupled to the resonator at a first junction and at a second junction with a length θ of transmission line running between the two couplings. The configuration provides two signal paths so that constructive interference occurs at the spurious resonance, and destructive interference occurs at a fundamental bandstop frequency. This provides spurious suppression by effectively cancelling out resonator couplings via the constructive interference, extending the upper passband of the bandstop filter to any degree required by the application.
    • 被配置为抑制寄生谐振频率的带阻滤波器包括:谐振器和传输线,其在第一结和第二连接处与长度与长度耦合到谐振器; 的传输线在两个联轴器之间运行。 该配置提供了两个信号路径,使得在寄生谐振处产生相当大的干扰,并且在基波频带频率处发生相消干扰。 这通过有效地消除谐振器耦合经由建设性的干扰来提供杂散抑制,将带阻滤波器的上通带扩展到应用所需的任何程度。
    • 55. 发明授权
    • Bandpass filter, and wireless communication module and wireless communication device using the bandpass filter
    • 带通滤波器,以及使用带通滤波器的无线通信模块和无线通信设备
    • US08878634B2
    • 2014-11-04
    • US13131236
    • 2009-11-24
    • Hiromichi YoshikawaMasafumi Horiuchi
    • Hiromichi YoshikawaMasafumi Horiuchi
    • H01P1/203H01P7/08
    • H01P1/20345H01P7/08
    • [Object] An object is to provide a bandpass filter that can be used for a wide frequency band and has a large degree of freedom in designing a passband, and a wireless communication module and a wireless communication device that use the bandpass filter.[Solution] A bandpass filter includes first to third resonance electrodes 31a, 31b, and 31c sequentially arranged side-by-side such that they are electromagnetically coupled to each other, the first to third resonance electrodes 31a, 31b, and 31c being grounded at one end and constituting first to third resonators, respectively; a first input/output coupling electrode 40a facing the first resonance electrode 31a and electromagnetically coupled thereto; a second input/output coupling electrode 40b facing the second resonance electrode 31b and electromagnetically coupled thereto; and a resonator coupling electrode 43 configured to provide electromagnetic coupling between the first resonance electrode 31a and the third resonance electrode 31c. The first and second resonators have the same resonance frequency which is different from a resonance frequency of the third resonator. The first to third resonators are used to produce a passband. The bandpass filter can be used for a wide frequency band and has a large degree of freedom in designing the passband.
    • 目的在于提供一种能够用于宽频带并且在设计通带时具有较大自由度的带通滤波器,以及使用带通滤波器的无线通信模块和无线通信装置。 [解决方案]带通滤波器包括:第一至第三谐振电极31a,31b和31c,它们彼此并联地并排排列成彼此并联;第一至第三谐振电极31a,31b和31c接地 一端并分别构成第一至第三谐振器; 面对第一谐振电极31a并与其电磁耦合的第一输入/输出耦合电极40a; 面向第二谐振电极31b并与其电磁耦合的第二输入/输出耦合电极40b; 以及构造成在第一谐振电极31a和第三谐振电极31c之间提供电磁耦合的谐振器耦合电极43。 第一和第二谐振器具有与第三谐振器的谐振频率不同的谐振频率。 第一至第三谐振器用于产生通带。 带通滤波器可以用于宽频带,并且在设计通带时具有很大的自由度。
    • 56. 发明授权
    • Wideband frequency tunable ring resonator
    • 宽带频率可调环形谐振器
    • US08854161B2
    • 2014-10-07
    • US13239426
    • 2011-09-22
    • Jian Xin ChenLi Heng ZhouHui TangZhi Hua BaoYong Jie YangQuan Xue
    • Jian Xin ChenLi Heng ZhouHui TangZhi Hua BaoYong Jie YangQuan Xue
    • H01P7/08
    • H01P7/088
    • The present invention provides a wideband frequency tunable ring resonator, wherein, comprises a closed λg/2 transmission line and two variable capacitors with tunable capacitance, the λg/2 transmission line is axisymmetric around a central line, first ends of the two variable capacitors are respectively connected to two intersection points of the λg/2 transmission line and the central line, the second ends of the two variable capacitors are respectively grounded. By implementing the technical solution of present invention, following technical effects are obtained. The fundamental resonant frequency (ffund) can be shifted up and down by controlling the respective values of the two loading capacitors, resulting in a bi-directional tuning of ffund. As a result, the tuning range of this invention can be approximately doubled as compared with the conventional tunable ring resonator.
    • 本发明提供一种宽带频率可调环形谐振器,其中包括一个闭合的λg/ 2传输线和两个具有可调电容的可变电容器,λg/ 2传输线围绕中心线是轴对称的,两个可变电容器的第一端 分别连接到λg/ 2传输线和中心线的两个交点,两个可变电容器的第二端分别接地。 通过实施本发明的技术方案,获得以下技术效果。 通过控制两个负载电容器的相应值,基本谐振频率(ffund)可以上下移动,从而导致ffund的双向调谐。 结果,与传统的可调环谐振器相比,本发明的调谐范围可以大致加倍。
    • 60. 发明授权
    • Tunable bandpass filter
    • 可调谐带通滤波器
    • US08760243B2
    • 2014-06-24
    • US13545923
    • 2012-07-10
    • Tamrat Akale
    • Tamrat Akale
    • H01P1/203H01P7/08
    • H01P1/20381H01P7/088
    • Tunable bandpass filters are provided. In one embodiment, the invention relates to a tunable bandpass filter including a dielectric substrate having a first surface opposite to a second surface, a conductive ground plane disposed on the first surface, a microstrip conductive trace pattern disposed on the second surface, the trace pattern defining a phase velocity compensation transmission line section including a series of spaced alternating T-shaped conductor portions, at least one varactor diode coupled to a first T-shaped conductor portion of the series of T-shaped conductor portions and to the conductive ground plane, and bias control circuitry coupled to the first T-shaped conductor portion, wherein the bias control circuitry is configured to control the at least one varactor diode.
    • 提供可调谐带通滤波器。 在一个实施例中,本发明涉及一种可调谐带通滤波器,包括具有与第二表面相对的第一表面的电介质基底,设置在第一表面上的导电接地平面,设置在第二表面上的微带导电迹线图案,迹线图案 定义了包括一系列间隔交替的T形导体部分的相速度补偿传输线部分,耦合到一系列T形导体部分的第一T形导体部分和导电接地平面的至少一个变容二极管, 以及耦合到所述第一T形导体部分的偏置控制电路,其中所述偏置控制电路被配置为控制所述至少一个变容二极管。