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公开(公告)号：US20220320702A1
公开(公告)日：2022-10-06
申请号：US17583804
申请日：2022-01-25
摘要： Radio frequency (RF) switches are provided. An RF switch includes a first RF transmission line and a second RF transmission line that are capacitively coupled to each other. Moreover, the RF switch includes a third RF transmission line having a signal trace that is electrically isolated from the first and second RF transmission lines. Related methods of operating filter devices are also provided.
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公开(公告)号：US11158918B2
公开(公告)日：2021-10-26
申请号：US16804024
申请日：2020-02-28
发明人： Xianxiang Li , Yangzhun Lv , Qing Mi , Qiyun Gu , Giuseppe Resnati
摘要： A band-stop filter comprises: a housing having a top wall, a bottom wall and at least one side wall, the housing defining an internal cavity; a signal input port and a signal output port that are respectively disposed on one of the at least one side wall; a resonating element that is disposed in the internal cavity and includes a top, a bottom, and a side; and a transmission line that is disposed in the internal cavity and coupled between the signal input port and the signal output port, the transmission line comprising a coupling section that is coupled to the resonating element, wherein the coupling section is configured to surround more than half of the side of the resonating element and not directly contact the housing and the resonating element.
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公开(公告)号：US11024931B2
公开(公告)日：2021-06-01
申请号：US16846614
申请日：2020-04-13
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：US10790564B2
公开(公告)日：2020-09-29
申请号：US16095219
申请日：2017-07-07
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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公开(公告)号：US10581133B2
公开(公告)日：2020-03-03
申请号：US15736097
申请日：2016-07-05
摘要： A resonant cavity filter has a housing having a resonator mounted therein, a tuning screw that comprises a head portion, a metallic tuning element and a dielectric spacer interposed between the head portion and the metallic tuning element. The tuning screw is mounted for coaxial insertion into an interior of the resonator to adjust a frequency response of the resonant cavity filter.
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公开(公告)号：US09863987B2
公开(公告)日：2018-01-09
申请号：US15335733
申请日：2016-10-27
发明人： Riccardo Massa , Vito Caggiano , Gianluca Ratti
CPC分类号： G01R23/20 , G01N3/34 , G01R31/2853
摘要： A passive intermodulation (“PIM”) distortion test apparatus includes a housing, hammering elements disposed within the housing, each hammering element including a moveable striking member, a strike plate positioned above the hammering elements, where a bottom surface of the strike plate is positioned at a distance above the hammering elements such that the moveable striking members of the hammering elements impact the strike plate when moved into their activated positions, and a retaining member that is configured to hold a device under test on a top surface of the strike plate while a PIM distortion test is performed on the device under test.
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公开(公告)号：US12062828B2
公开(公告)日：2024-08-13
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 , H01P1/2084 , H01P3/12
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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公开(公告)号：US11996875B2
公开(公告)日：2024-05-28
申请号：US17690182
申请日：2022-03-09
发明人： Roman Tkadlec , Stefano Tamiazzo , Marco Riva
CPC分类号： H04B1/163 , H04B1/1607 , H04B1/18
摘要： Filters include a housing having an input port and an output port and a plurality of resonant cavities within the housing. Each resonant cavity may include a respective notch resonator. The filter may further include a bandpass filter that includes a plurality of bandpass resonators, the bandpass filter extending between the input port and the output port. The bandpass filter may replace a transmission line that is included in conventional filters.
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公开(公告)号：US11996599B2
公开(公告)日：2024-05-28
申请号：US17628319
申请日：2020-07-30
发明人： Andrea Facchini , Luca Bonato , Yrjo Erkki Hugg , Roman Tkadlec
CPC分类号： H01P1/208 , H01P1/2084 , H01P7/06
摘要： A resonant cavity filter includes a filter housing defining an internal cavity therein, a resonating element in the internal cavity of the filter housing, and a coupling transmission line extending adjacent a periphery of the resonating element in the internal cavity of the filter housing. The resonating element is rotatable relative to the coupling transmission line to vary an electromagnetic coupling therebetween. Related devices and methods of operation are also discussed.
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公开(公告)号：US20220294483A1
公开(公告)日：2022-09-15
申请号：US17690182
申请日：2022-03-09
发明人： Roman Tkadlec , Stefano Tamiazzo , Marco Riva
摘要： Filters include a housing having an input port and an output port and a plurality of resonant cavities within the housing. Each resonant cavity may include a respective notch resonator. The filter may further include a bandpass filter that includes a plurality of bandpass resonators, the bandpass filter extending between the input port and the output port. The bandpass filter may replace a transmission line that is included in conventional filters.
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