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公开(公告)号：US11183745B2
公开(公告)日：2021-11-23
申请号：US17005387
申请日：2020-08-28
发明人： Roman Tkadlec , Stefano Tamiazzo
摘要： In-line filters may include a tubular metallic housing defining a single inner cavity that extends along a longitudinal axis and a plurality of resonators that are spaced apart along the longitudinal axis within the single inner cavity, each resonator having a stalk. The stalks of first and second of the resonators that are adjacent each other are rotated to have different angular orientations.
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32.发明授权公开(公告)号：US10944144B2
公开(公告)日：2021-03-09
申请号：US16281146
申请日：2019-02-21
摘要： RF transmission lines that include a conductive ground plane, a conductive strip that extends above the ground plane, one or more plastic strips disposed between the conductive ground plane and the conductive strip, the one or more plastic strips having a combined length that is at least half a length of the conductive strip, and a plurality of dielectric fasteners that maintain the conductive strip at a predetermined distance above the conductive ground plane.
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公开(公告)号：US10236550B2
公开(公告)日：2019-03-19
申请号：US15529775
申请日：2015-07-10
发明人： Stefano Tamiazzo , Giuseppe Resnati
IPC分类号： H01P1/205
摘要： An in-line resonator filter has a linear array of three or more conductors. A first pair of adjacent conductors has inductive main coupling and oppositely signed capacitive main coupling, while a second pair of non-adjacent conductors has inductive cross-coupling. The first and second pairs have one conductor in common. Between the second pair of non-adjacent conductors, there is no direct ohmic connection that provides the corresponding inductive cross-coupling. The oppositely signed capacitive main coupling compensates for at least a portion of the inductive main coupling between the first pair of adjacent conductors. The in-line resonator filter is able to provide one or more transmission zeros without requiring any discrete bypass connectors that provide direct ohmic connection between pairs of non-adjacent conductors. As such, the in-line resonator filters can be smaller, less complex, and less susceptible to damage.
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公开(公告)号：US10090938B2
公开(公告)日：2018-10-02
申请号：US15526592
申请日：2015-01-06
发明人： Sammit A. Patel , Ray K. Butler , John W. Brunner , Xiaohua Hou
摘要： For wireless cellular communications, a “smart” multi-band combiner system has a multi-band combiner and a passive inter-modulation (PIM) detection sub-system. The multi-band combiner combines multiple transmit signals in different downlink frequency bands into a single, multi-band transmit signal for transmission from a cell tower antenna. The PIM detection sub-system characterizes the frequency components in the multi-band transmit signal to predict PIM products and determine if any predicted PIM products might interfere with any receive signals in any uplink frequency bands. If so, the PIM detection sub-system generates a signal indicating the presence of such predicted interfering PIM products, and the system installer and/or the network administrator can take remedial action to prevent the PIM products from interfering with user communications.
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公开(公告)号：US20120326811A1
公开(公告)日：2012-12-27
申请号：US13192778
申请日：2011-07-28
IPC分类号： H01P7/10
CPC分类号： H01P7/10
摘要： A (TM01) dielectric resonator has a metal housing, a dielectric insert, and a resilient element located between one end of the dielectric insert and the housing. The resilient element ensures physical contact between the housing and both ends of the dielectric insert over the entire operating temperature range of the resonator, thereby compensating for differences in the coefficients of thermal expansion of the materials used for the metal housing and the dielectric insert. In one embodiment, the dielectric insert is housed within a cylindrical tube between a top cover and a bottom end cap, the resilient element is an electrically non-conductive (silicone rubber) gasket, and the resonator has a thin, electrically conductive (aluminum) plate located (i) between the dielectric insert and the gasket and (ii) between the end cap and the tube to ensure a contiguous electrically conductive path from one end of the dielectric insert to the other.
摘要翻译： A（TM01）介质谐振器具有金属壳体，电介质插入件和位于电介质插入件的一端和壳体之间的弹性元件。 弹性元件确保壳体与谐振器的整个工作温度范围之间的电介质插入件的两端之间的物理接触，由此补偿用于金属外壳和电介质插入件的材料的热膨胀系数的差异。 在一个实施例中，电介质插入件容纳在顶盖和底端盖之间的圆柱形管内，弹性元件是非导电（硅橡胶）垫圈，并且谐振器具有薄的导电（铝） 位于介质插入件和垫圈之间的（i）和（ii）端盖和管之间，以确保从电介质插入件的一端到另一端的连续导电路径。
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公开(公告)号：US20240039138A1
公开(公告)日：2024-02-01
申请号：US18257163
申请日：2022-03-16
发明人： Matteo CENDAMO , Marco COMERLATI
摘要： Bias tees are provided that include a radio frequency (RF) transmission line. The bias tees include a dielectric material that is configured to provide a capacitance between the RF transmission line and ground. The bias tees include a high-frequency port, a common port, and a low-frequency port, and the RF transmission line is coupled between the common port and the low-frequency port.
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公开(公告)号：US11881609B2
公开(公告)日：2024-01-23
申请号：US17722753
申请日：2022-04-18
发明人： Andrea Manzoni , Luca Bonato , Antonio Sala
CPC分类号： H01P1/2053 , H01P1/207 , H01P3/12 , H01P7/04 , H01P7/06 , H01P7/10 , H01P11/007 , H01P11/008
摘要： An assembly for a radio frequency filter includes: an elongate pedestal with an upper surface; a resonator; a tuning member that is positioned above the resonator; and a screw that mounts the resonator to the upper surface of the pedestal, the screw including a shank with a thread and a head, the head including a plurality of recesses configured to receive a tool, the recesses extending through the head.
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公开(公告)号：US11770164B2
公开(公告)日：2023-09-26
申请号：US17354222
申请日：2021-06-22
摘要： Devices having bypassable radio frequency (RF) filters are provided. A device includes a bypassable RF filter and an adjustable-length RF transmission line that is coupled thereto. Moreover, the device includes a component that is coupled to the adjustable-length RF transmission line and is configured to change an electrical length of the adjustable-length RF transmission line between a first length and a second length. Related methods of bypassing the bypassable RF filter are also provided.
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公开(公告)号：US11757164B2
公开(公告)日：2023-09-12
申请号：US17319140
申请日：2021-05-13
发明人： Stefano Tamiazzo , Giuseppe Resnati
IPC分类号： H01P1/205
CPC分类号： H01P1/2053 , H01P1/205
摘要： An in-line resonator filter has a linear array of three or more conductors. A first pair of adjacent conductors has inductive main coupling and oppositely signed capacitive main coupling, while a second pair of non-adjacent conductors has inductive cross-coupling. The first and second pairs have one conductor in common. Between the second pair of non-adjacent conductors, there is no direct ohmic connection that provides the corresponding inductive cross-coupling. The oppositely signed capacitive main coupling compensates for at least a portion of the inductive main coupling between the first pair of adjacent conductors. The in-line resonator filter is able to provide one or more transmission zeros without requiring any discrete bypass connectors that provide direct ohmic connection between pairs of non-adjacent conductors. As such, the in-line resonator filters can be smaller, less complex, and less susceptible to damage.
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40.发明公开公开(公告)号：US20230275335A1
公开(公告)日：2023-08-31
申请号：US18311665
申请日：2023-05-03
发明人： Martin Kufa , Luká{hacek over (s)} Matrka , Frantisek Ondracek , Jaromir Peroutka , Giuseppe Resnati
CPC分类号： H01P7/10 , H01P1/207 , H01P3/12 , H01P1/2084
摘要： Resonant cavity filters include a conductive housing having a floor. A dielectric resonator is mounted to extend upwardly from the floor. The dielectric resonator has a cylindrical body with a longitudinal bore that defines an inner sidewall. The longitudinal bore has a variable transverse cross-sectional area. A threaded dielectric fastener is at least partially inserted within the longitudinal bore of the cylindrical body.
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