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61.发明申请公开(公告)号：US20190140334A1
公开(公告)日：2019-05-09
申请号：US16095219
申请日：2017-07-07
Applicant: CommScope Italy S.r.l.
Inventor： Roman TKADLEC , Stefano TAMIAZZO
Abstract: 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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公开(公告)号：US10236550B2
公开(公告)日：2019-03-19
申请号：US15529775
申请日：2015-07-10
Applicant: CommScope Italy S.r.l.
Inventor： Stefano Tamiazzo , Giuseppe Resnati
IPC: H01P1/205
Abstract: 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：US20180331406A1
公开(公告)日：2018-11-15
申请号：US16039366
申请日：2018-07-19
Applicant: CommScope Italy S.r.l.
Inventor： ROMAN TKADLEC , YongJie Xu , Richard Brown , Giuseppe Resnati , Omar Parimbelli , Sammit Patel
CPC classification number: H01P1/207 , H01P1/20345 , H01P1/2135 , H01P1/2138 , H01P7/06
Abstract: The present invention provides filter assemblies, tuning elements and a method of tuning a filter. A filter assembly includes a housing having a top cover, a bottom cover and at least one sidewall, the top cover, the bottom cover and the at least one sidewall defining an internal cavity, the housing configured to receive first through third radio frequency (“RF”) transmission lines; a top metal sheet mounted within the internal cavity that has a plurality of openings that form a first hole pattern; and a bottom metal sheet mounted within the internal cavity that has a plurality of openings that form a second hole pattern. The top and bottom metal sheets are vertically spaced-apart from each other in a vertically stacked relationship within the internal cavity. The top metal sheet and the bottom metal sheet each include at least one resonator.
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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
Applicant: CommScope Italy S.R.L.
Inventor： Sammit A. Patel , Ray K. Butler , John W. Brunner , Xiaohua Hou
Abstract: 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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