Patents by Inventor Changfu Chen
Changfu Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240145904Abstract: A base station antenna includes: a reflector; a first radiator located at the front side of the reflector; an ground conductor located at the rear side of the reflector, the ground conductor forming a chamber with an opening forward; and a first stripline conductor mounted in the chamber configured to feed the first radiator, the first stripline conductor extending in a plane substantially parallel to the reflector; where the reflector and the ground conductor are configured such that the opening is capped by the reflector, and the reflector is grounded via the ground conductor, so that the first stripline conductor and the ground conductor and the reflector are configured as a first strip transmission line.Type: ApplicationFiled: October 11, 2023Publication date: May 2, 2024Inventors: Changfu Chen, Haifei Qin, Yuemin Li, Junfeng Yu, Long Shan
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Publication number: 20240145938Abstract: A radiating element includes: a plurality of radiators, where each radiator includes a first side arm segment and a second side arm segment; a plurality of feeder rods, where each feeder rod is electrically connected to a respective one of a plurality of first side arm segments and a plurality of second side arm segments, where each group of feeder rods and their connected side arm segments include a first portion and a second portion electrically insulating from each other; and at least one common mode current suppressing component, where each common mode current suppressing component includes a first conductive portion and a second conductive portion adjacent to each other and electrically insulating, where the first conductive portion is electrically connected between a first portion of a group of feeder rods and their connected side arm segments and a second portion of an adjacent group of feeder rods and their connected side arm segments, and the second conductive portion is electrically connected betweeType: ApplicationFiled: October 24, 2023Publication date: May 2, 2024Inventors: Bin Sun, Changfu Chen, Jian Zhang, Cheng Xue, Pengfei Guo
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Publication number: 20240136725Abstract: A reflector for a base station antenna comprises: a body; and at least one slot provided in the body, where the at least one slot is configured for forming at least one stub-type filtering structure in the body. The stub-type filtering structure is configured for at least partially inhibiting an induced current in the body within an operating frequency band of a radiating element mounted behind the reflector.Type: ApplicationFiled: October 19, 2023Publication date: April 25, 2024Inventors: Qiang Liu, Xun Zhang, Changfu Chen, Nengbin Liu
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Patent number: 11968782Abstract: The present disclosure relates to a coupler and a base station antenna.Type: GrantFiled: July 28, 2021Date of Patent: April 23, 2024Assignee: CommScope Technologies LLCInventors: Xiaotuo Wang, Changfu Chen, Hangsheng Wen
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Publication number: 20240039159Abstract: The present disclosure relates to a radiating element, which includes: a dipole arm configured to emit first electromagnetic radiation within a pre-determined first operating frequency band; and a parasitic radiator, configured such that a first induced current induced on the parasitic radiator within a second operating frequency band at least partially cancels a second induced current induced on the dipole arm within the second operating frequency band. In addition, the present disclosure relates to a base station antenna, including: a first radiating element array, configured to emit first electromagnetic radiation within a pre-determined first operating frequency band, and at least a part of first radiating elements in the first radiating element array is constructed as radiating elements according to the present disclosure; a second radiating element array, configured to emit second electromagnetic radiation within a pre-determined second operating frequency band.Type: ApplicationFiled: July 20, 2023Publication date: February 1, 2024Inventors: Ting Zhang, Fangwen Wan, Changfu Chen
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Publication number: 20240030591Abstract: A base station antenna that may include radiating elements having tilted dipoles. For example, a base station antenna may include a reflector and a plurality of radiating elements, each radiating element mounted on the front surface of the reflector and having a support stalk and at least one dipole mounted to the support stalk. The radiating elements include a plurality of first radiating elements configured to operate in a first operating frequency band, and arranged in one or more first columns extending along a first direction; and a plurality of second radiating elements, configured to operate in a second operating frequency band different from the first operating frequency band, and arranged in one or more second columns extending along the first direction. At least one dipole of a first of the second radiating elements in at least one of the second columns is tilted around the first direction.Type: ApplicationFiled: September 1, 2021Publication date: January 25, 2024Inventors: Qiang Liu, Changfu Chen, Rongrong Zhang, Yuemin Li
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Patent number: 11831083Abstract: Radiating elements include a conductive patch having first and second slots that each extend along a first axis and third and fourth slots that each extend along a second axis that is perpendicular to the first axis, a feed network that includes first through fourth feed lines, each feed line crossing a respective one of the first through fourth slots, and a conductive ring that at least partially surrounds the periphery of the conductive patch and that encloses each of the first through fourth slots.Type: GrantFiled: June 30, 2022Date of Patent: November 28, 2023Assignee: CommScope Technologies LLCInventors: Bo Wu, Changfu Chen, YueMin Li, Mohammad Vatankhah Varnoosfaderani, Jian Zhang, Fan He, Peter J. Bisiules
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Patent number: 11811144Abstract: The present disclosure relates to an antenna device comprising: a first antenna comprising a first reflecting member configured to reflect at least a portion of a signal radiated by the antenna device; a second antenna comprising a second reflecting member configured to reflect at least a portion of the signal radiated by the antenna device, there is a spacing between the first reflecting member and the second reflecting member; and a coupling capacitor comprising a first polar plate and a second polar plate, the first polar plate is disposed on a side, close to the spacing, of a first reflecting surface of the first reflecting member, and the second polar plate is disposed on a side, close to the spacing, of a second reflecting surface of the second reflecting member.Type: GrantFiled: June 16, 2021Date of Patent: November 7, 2023Assignee: CommScope Technologies LLCInventors: Changfu Chen, Xiaotuo Wang, Xun Zhang
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Publication number: 20230291103Abstract: An antenna includes a reflector, a radiating element extending forwardly of the reflector, and a director positioned forwardly of the radiating element. The director includes a plurality of passive impedance elements that provide frequency-dependent reactances to currents induced therein responsive to electromagnetic radiation generated by the radiating element. The plurality of passive impedance elements include: (i) a primary capacitive element, (ii) a first series LC circuit having a first inductor therein electrically connected to a first portion of the primary capacitive element, and (iii) a second series LC circuit having a second inductor therein electrically connected to a second portion of the primary capacitive element.Type: ApplicationFiled: March 16, 2023Publication date: September 14, 2023Inventors: Changfu Chen, Runmiao Wu
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Publication number: 20230253710Abstract: The present disclosure relates to a phase shifter assembly comprising a phase shift circuit and a dielectric assembly having at least one dielectric element movable relative to the phase shift circuit for phase shifting, wherein the at least one dielectric element is disposed at a set distance from the phase shift circuit to form a gap between the at least one dielectric element and the phase shift circuit. In addition, the present disclosure also relates to a cavity phase shifter and a base station antenna.Type: ApplicationFiled: January 5, 2023Publication date: August 10, 2023Inventors: Yuanpeng Ren, Changfu Chen, Shuguang Shao
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Publication number: 20230216197Abstract: A multi-band antenna includes a first column of radiating elements that are configured to operate in a first operating frequency band mounted on a reflecting plate; a second column of radiating elements that are configured to operate in a second operating frequency band mounted on the reflecting plate; a first fence and a second fence located on both sides of the reflecting plate that extend forward from the reflecting plate, where the first and second columns of radiating elements are arranged in between the first and second fences, the first fence and the second fence respectively comprise a frequency selective surface with a passband and a stopband, the passband covers at least the first operating frequency band, and the stopband covers at least the second operating frequency band.Type: ApplicationFiled: January 5, 2023Publication date: July 6, 2023Inventors: Changfu Chen, Pengfei Guo
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Publication number: 20230155287Abstract: The present disclosure relates to a phase shifter, which includes: a phase shift circuit board with conductive traces printed thereon; and a phase shift circuit board with conductive traces printed thereon; and a slide device with a first tooth section configured to be driven, wherein movement of the first tooth section drives the slide device to slide on the phase shift circuit board. In addition, the present disclosure further relates to a remote electrical tilt system, which includes an actuator, a transmission mechanism, and at least one phase shifter according to the present disclosure, wherein the actuator is configured to drive the transmission mechanism, and the transmission mechanism engages the first tooth section to drive the slide device to slide on the phase shift circuit board. In addition, the present disclosure also relates to a base station antenna which includes the remote electrical tilt system according to the present disclosure.Type: ApplicationFiled: January 4, 2023Publication date: May 18, 2023Inventors: Yiding Wang, PuLiang Tang, Changfu Chen
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Patent number: 11637373Abstract: An antenna includes a first radiating element configured to emit first electromagnetic radiation in response to at least one feed signal having a frequency within a first radio frequency (RF) band. A director is provided, which is positioned forwardly of the first radiating element, and in a path of the first electromagnetic radiation. The director includes first and second passive impedance elements that provide respective first and second frequency-dependent reactances to first currents induced within the director in response to the first electromagnetic radiation. The first and second passive impedance elements may include a first inductor and a first capacitor, which are electrically coupled in series. The director may also be configured to include a plurality of passive impedance elements that are connected within an impedance loop containing a second LC circuit in series with a first LC circuit.Type: GrantFiled: February 22, 2021Date of Patent: April 25, 2023Assignee: CommScope Technologies LLCInventors: Changfu Chen, Runmiao Wu
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Publication number: 20230064306Abstract: A connection assembly for an antenna includes a printed circuit board and a coaxial cable connected to the printed circuit board. A transmission trace and a solder pad are provided on the printed circuit board. An opening for receiving an end portion of the coaxial cable is also provided in the printed circuit board, and an exposed outer conductor of the end portion extends into the opening, and an exposed inner conductor reaches the solder pad. The connection assembly further includes a ground structure, which is electrically connected to a ground metal layer on a second surface of the printed circuit board, and the ground structure is at least partially arranged on both sides of the exposed inner conductor and/or the exposed outer conductor.Type: ApplicationFiled: August 3, 2022Publication date: March 2, 2023Inventors: Cheng Xue, Bo Wu, Fei Li, Jian Zhang, Yuanpeng Ren, Changfu Chen, Xun Zhang
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Publication number: 20230059701Abstract: A power divider includes: a dielectric substrate; a transmission line circuit on a first surface of the dielectric substrate, the transmission line circuit including an input trace, a first output trace and a second output trace. The transmission line circuit is configured to split a signal received at the input trace into a first sub-component that is output on the first output trace and a second sub-component that is output on the second output trace; and a reference potential layer, set on a second surface opposite the first surface of the dielectric substrate, where the reference potential layer is provided with a decoupling window that exposes a part of the dielectric substrate to reduce coupling in the transmission line circuit.Type: ApplicationFiled: July 20, 2022Publication date: February 23, 2023Inventors: Jianpeng Lu, Changfu Chen, Fei Li
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Patent number: 11575197Abstract: A multi-band antenna includes a reflector, and a plurality of first radiating elements on the reflector. The plurality of first radiating elements are configured to radiate a first antenna beam(s) in a first frequency band responsive to at least one feed signal. A passive radiation-filtering element is provided, which extends proximate the first antenna beam(s). The passive radiation-filtering element includes at least one of a low-pass LC circuit, a band-pass LC circuit, and a high-pass LC circuit therein, which is configured to provide a lower frequency-dependent impedance to radiation within the first frequency band relative to radiation at frequencies outside the first frequency band. The passive radiation-filtering element may be configured as a multi-segment fence having capacitive and inductive elements therein, which are electrically coupled in series.Type: GrantFiled: April 5, 2021Date of Patent: February 7, 2023Assignee: CommScope Technologies LLCInventors: Runmiao Wu, Changfu Chen
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Patent number: 11557829Abstract: The present invention relates to a base station antenna. The base station antenna comprises: a reflector that is configured to provide a ground plane; a first radiating element array including at least one first cross-polarized radiating element that is arranged on the reflector; and a first parasitic element array including first through third parasitic element pairs, wherein each of the first through third parasitic element pairs includes a pair of parasitic elements that are arranged substantially symmetrically on both sides of the first longitudinal axis, and distances from the first through third parasitic element pairs respectively to the first longitudinal axis increase sequentially, wherein projections of any two of the first parasitic element pair, the second parasitic element pair, the third parasitic element pair, and the at least one first cross-polarized radiating element on the first longitudinal axis at least partly overlap.Type: GrantFiled: March 12, 2021Date of Patent: January 17, 2023Assignee: CommScope Technologies LLCInventors: Changfu Chen, Jian Zhang
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Patent number: 11552396Abstract: The present disclosure relates to a phase shifter, which includes: a phase shift circuit board with conductive traces printed thereon; and a phase shift circuit board with conductive traces printed thereon; and a slide device with a first tooth section configured to be driven, wherein movement of the first tooth section drives the slide device to slide on the phase shift circuit board. In addition, the present disclosure further relates to a remote electrical tilt system, which includes an actuator, a transmission mechanism, and at least one phase shifter according to the present disclosure, wherein the actuator is configured to drive the transmission mechanism, and the transmission mechanism engages the first tooth section to drive the slide device to slide on the phase shift circuit board. In addition, the present disclosure also relates to a base station antenna which includes the remote electrical tilt system according to the present disclosure.Type: GrantFiled: July 7, 2021Date of Patent: January 10, 2023Assignee: CommScope Technologies LLCInventors: Yiding Wang, PuLiang Tang, Changfu Chen
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Publication number: 20220352644Abstract: A multi-band antenna includes a reflector that provides a ground plane, a first array of first radiating elements, each of the first radiating elements located on a front side of the reflector and configured to emit first electromagnetic radiation in a low frequency band, a second array of second radiating elements, each of the second radiating elements located on the front side of the reflector and configured to emit second electromagnetic radiation in a high frequency band, and an artificial magnetic conductor (AMC) plane that is located between the reflector and a radiator of the first radiating element and between the reflector and a radiator of the second radiating element. The AMC plane is configured to reflect the first electromagnetic radiation substantially in phase and to reflect the second electromagnetic radiation substantially in antiphase.Type: ApplicationFiled: April 21, 2022Publication date: November 3, 2022Inventors: Changfu Chen, Pengfei Guo
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Publication number: 20220336964Abstract: Radiating elements include a conductive patch having first and second slots that each extend along a first axis and third and fourth slots that each extend along a second axis that is perpendicular to the first axis, a feed network that includes first through fourth feed lines, each feed line crossing a respective one of the first through fourth slots, and a conductive ring that at least partially surrounds the periphery of the conductive patch and that encloses each of the first through fourth slots.Type: ApplicationFiled: June 30, 2022Publication date: October 20, 2022Inventors: Bo Wu, Changfu Chen, YueMin Li, Mohammad Vatankhah Varnoosfaderani, Jian Zhang, Fan He, Peter J. Bisiules