Abstract: A BAW resonance device comprises a first layer including a cavity located on a first side, a first electrode having a first end located in the cavity and a second end contacting with the first layer, a second layer located on the first side, and a second electrode located on the second layer above the cavity, wherein the first electrode and the second electrode are located on two sides of the second layer. The first electrode comprises a first electrode layer and a second electrode layer, and the second electrode layer and the second layer are located on two sides of the first electrode layer. The second electrode comprises a third electrode layer and a fourth electrode layer, and the second layer and the fourth electrode layer are located on two sides of the third electrode layer. Thus, the electrical resistance is lowered and the electrical losses are reduced.

Abstract: The invention provides a filter device, an RF front-end device and a wireless communication device. The filter device comprises a substrate, at least one resonance device, a passive device and a connector, wherein the at least one resonance device has a first side and a second side opposite to the first side, the substrate is located on the first side, and the passive device is located on the second side. The at least one resonance device is connected to the passive device through the connector. The RF filter device formed by integrating the resonance device (such as an SAW resonance device or a BAW resonance device) and the passive device (such as an IPD) in one die can broaden the passband width, has a high out-of-band rejection, and occupies less space in an RF front-end chip.

Abstract: A compact 5G MIMO antenna system includes at least two antenna assemblies. Each antenna assembly includes a first antenna unit and a second antenna unit, wherein the first antenna unit includes a first radiation assembly, a first feed branch and a ground branch; the second antenna unit includes a second radiation assembly, a second feed branch and the ground branch; the ground branch is located between the first radiation assembly and the second radiation assembly; the first feed branch is arranged close to an end, away from the ground branch, of the first radiation assembly; and the second feed branch is arranged close to an end, away from ground branch, of the second radiation assembly. The antenna system improves the isolation between the first antenna unit and the second antenna unit and compacts the overall structure of the antenna assembly, which has simple structure, high antenna efficiency, and convenient use.

Abstract: A formation method of a filter device includes: forming a first layer by providing a first substrate and forming a resonance device preprocessing layer with a first side and a second side opposite to the first side, wherein the first substrate is located on the first side; forming a second layer by providing a second substrate and forming a first passive device with a third side and a fourth side opposite to the third side, wherein the second substrate is located on the third side; connecting the first layer located on the fourth side and the second layer located on the second side; removing the first substrate; and forming at least one first resonance device based on the resonance device preprocessing layer. The resonance device and the passive device are integrated in one die to form a filter device, which requires less space in an RF front-end chip.

Abstract: A filter device, an RF front-end device and a wireless communication device are provided. The filter device includes a substrate, a passive device and at least one resonance device, wherein the passive device has a first side and a second side opposite to the first side, the substrate is located on the first side, and the at least one resonance device is located on the second side. The RF filter device formed by integrating the resonance device (such as an SAW or BAW resonance device) and the passive device (such as an IPD) can broaden the pass-band width, has a high out-of-band rejection, and occupies less space in an RF front-end chip.

Abstract: A dual-polarized millimeter wave antenna unit, an antenna system, and a mobile terminal are disclosed. The dual-polarized millimeter wave antenna unit comprises a main part, a first feed branch, a second feed branch, and a radiator, wherein the radiator is arranged on the top face of the main part, the first feed branch is arranged on a first side face of the main part, the second feed branch is arranged on a second side face of the main body, the first feed branch and the second feed branch are communicated with the bottom face of the main part, the first side face is perpendicular to the second side face, and a weld region is arranged on the bottom face of the main part. The dual-polarized millimeter wave antenna unit provided by the invention has the advantages of wideband, dual polarization, and low sidelobe, thus being especially suitable for 5G communication.

Abstract: A 5G MMW dual-polarized antenna module and a handheld device are disclosed. The antenna module comprises at least two antenna units. Each antenna unit comprises a first horizontal metal plate, a second horizontal metal plate, a first vertical metal plate, a second vertical metal plate and a patch antenna assembly. The antenna module can work within the 5G MMW frequency band and has the characteristic of dual polarization; and when applied to the handheld device, the antenna module will not increase the thickness of the handheld device and is conducive to ultra-thin development of the handheld device.

Abstract: A rectangular impact-resistant elastic connector includes an upper contact part, first and second side plates, first and second S-shaped lift force arms and a bottom plate, wherein the first and second side plates are connected with the bottom plate, the first S-shaped lift force arm has an end connected with the upper contact part and an end connected with one end of the first side plate, and the second S-shaped lift force arm has an end suspended below the upper contact part and an end connected with one end of the second side plate. The S-shaped lift force arm structures having the advantage of greater elasticity over other force arm structures under the same unit size are used to provide an elastic force, so that the size of the connector is reduced. The side plates protect the force arms, thus, improving the overall impact resistance of the connector.

Abstract: An antenna unit, a MIMO antenna and a handheld device. The antenna unit includes a feeder and a radiator, wherein the radiator is in a 90°-rotated U shape and includes a first horizontal part, a first vertical part and a second horizontal part, two ends of the first vertical part are respectively connected to the first horizontal part and the second horizontal part; the feeder is located in the U shape and includes a second vertical part, a third horizontal part and a third vertical part, two ends of the third horizontal part are respectively connected to the second vertical part and the third vertical part, and the second vertical part and the third vertical part are located on different sides of the third horizontal part. The MIMO antenna has an ultra wideband.

Abstract: A dual-polarized millimeter wave antenna unit, an antenna system, and a mobile terminal are disclosed. The dual-polarized millimeter wave antenna unit comprises a main part, a first feed branch, a second feed branch, and a radiator, wherein the radiator is arranged on the top face of the main part, the first feed branch is arranged on a first side face of the main part, the second feed branch is arranged on a second side face of the main body, the first feed branch and the second feed branch are communicated with the bottom face of the main part, the first side face is perpendicular to the second side face, and a weld region is arranged on the bottom face of the main part. The dual-polarized millimeter wave antenna unit provided by the invention has the advantages of wideband, dual polarization, and low sidelobe, thus being especially suitable for 5G communication.

Abstract: A rectangular impact-resistant elastic connector includes an upper contact part, first and second side plates, first and second S-shaped lift force arms and a bottom plate, wherein the first and second side plates are connected with the bottom plate, the first S-shaped lift force arm has an end connected with the upper contact part and an end connected with one end of the first side plate, and the second S-shaped lift force arm has an end suspended below the upper contact part and an end connected with one end of the second side plate. The S-shaped lift force arm structures having the advantage of greater elasticity over other force arm structures under the same unit size are used to provide an elastic force, so that the size of the connector is reduced. The side plates protect the force arms, thus, improving the overall impact resistance of the connector.

Abstract: A 5G MIMO antenna structure includes a PCB and more than one first antenna assembly arranged on the PCB at intervals. Each first antenna assembly includes a feed branch, a first radiator and two second radiators, wherein the first radiator and the two second radiators are coupled to the feed branch, the first radiator is of an inverted U-structure and has two tail ends connected to grounding points of the PCB, the feed branch is located in the first radiator and corresponds to a feed point of the PCB in position, and the two second radiators are arranged in the first radiator, connected to the first radiator, and respectively located on two sides of the feed branch. The 5G MIMO antenna structure has a good radiation effect, a good isolation effect and a smaller size, and can meet the usage requirements of a 5G system below 6 GHz.

Abstract: A 5G MIMO antenna system includes at least four antenna units which are arrayed at intervals. Each antenna unit includes a first branch and a second branch, wherein the first branch is of an inverted-U structure, and two ends of an opening of the first branch are grounded; the second branch is located in an area defined by the first branch and is a monopole branch, and a feed point is arranged at an end, close to the opening of the first branch, of the second branch. The first branches and the second branches generate two different resonances, so that the 5G antenna system has a broadband operation. Meanwhile, the 5G MIMO antenna system has the characteristics of being small in size, good in isolation and broad in frequency band.

Abstract: A dual-polarized millimeter-wave antenna system applicable to 5G communications and a mobile terminal are disclosed. Each antenna element comprises a radiating body and a director, wherein the radiating body comprises a first dielectric layer, a main radiating part, a first feeding branch, a second feeding branch, a third feeding branch and a fourth branch, and the director comprises a second dielectric layer, a first director part and a second director part. The director has the same effect on a +45° polarization pattern and a ?45° polarization pattern of the radiating body, so that wide-angle coverage is realized, and the consistency of the two polarization patterns is good; and the antenna system occupies a small area does not need a clearance area and can be placed on a complete metal ground plate, there by being suitable for full-screen equipment.

Abstract: An antenna unit, a MIMO antenna and a handheld device. The antenna unit includes a feeder and a radiator, wherein the radiator is in a 90°-rotated U shape and includes a first horizontal part, a first vertical part and a second horizontal part, two ends of the first vertical part are respectively connected to the first horizontal part and the second horizontal part; the feeder is located in the U shape and includes a second vertical part, a third horizontal part and a third vertical part, two ends of the third horizontal part are respectively connected to the second vertical part and the third vertical part, and the second vertical part and the third vertical part are located on different sides of the third horizontal part. The MIMO antenna has an ultra wideband.

Abstract: A 5G wideband MIMO antenna system based on coupled loop antennas and a mobile terminal are disclosed. The antenna system comprises at least four antenna units comprising an antenna frame, a first coupling branch, a second coupling branch, a feed branch and an ground branch, wherein one end of the first coupling branch and one end of the ground branch are overlapped in the thickness or length direction of the frame, one end of the second coupling branch and one end of the feed branch are overlapped in the thickness or length direction of the frame. A traditional loop antenna is converted into a coupled loop antenna with three coupling regions. The coupled loop antenna system is high in antenna efficiency, good in isolation, simple in structure and easy to manufacture and has a small height when placed vertically, thereby making the mobile terminal lighter and thinner.

Abstract: A 5G MIMO antenna system includes at least four antenna units which are arrayed at intervals. Each antenna unit includes a first branch and a second branch, wherein the first branch is of an inverted-U structure, and two ends of an opening of the first branch are grounded; the second branch is located in an area defined by the first branch and is a monopole branch, and a feed point is arranged at an end, close to the opening of the first branch, of the second branch. The first branches and the second branches generate two different resonances, so that the 5G antenna system has a broadband operation. Meanwhile, the 5G MIMO antenna system has the characteristics of being small in size, good in isolation and broad in frequency band.

Abstract: A 5G wideband MIMO antenna system based on coupled loop antennas and a mobile terminal are disclosed. The antenna system comprises at least four antenna units comprising an antenna frame, a first coupling branch, a second coupling branch, a feed branch and an ground branch, wherein one end of the first coupling branch and one end of the ground branch are overlapped in the thickness or length direction of the frame, one end of the second coupling branch and one end of the feed branch are overlapped in the thickness or length direction of the frame. A traditional loop antenna is converted into a coupled loop antenna with three coupling regions. The coupled loop antenna system is high in antenna efficiency, good in isolation, simple in structure and easy to manufacture and has a small height when placed vertically, thereby making the mobile terminal lighter and thinner.

Abstract: A dual-polarized millimeter-wave antenna system applicable to 5G communications and a mobile terminal are disclosed. Each antenna element comprises a radiating body and a director, wherein the radiating body comprises a first dielectric layer, a main radiating part, a first feeding branch, a second feeding branch, a third feeding branch and a fourth branch, and the director comprises a second dielectric layer, a first director part and a second director part. The director has the same effect on a +45° polarization pattern and a ?45° polarization pattern of the radiating body, so that wide-angle coverage is realized, and the consistency of the two polarization patterns is good; and the antenna system occupies a small area does not need a clearance area and can be placed on a complete metal ground plate, there by being suitable for full-screen equipment.

Abstract: A 5G MIMO antenna structure includes a PCB and more than one first antenna assembly arranged on the PCB at intervals. Each first antenna assembly includes a feed branch, a first radiator and two second radiators, wherein the first radiator and the two second radiators are coupled to the feed branch, the first radiator is of an inverted U-structure and has two tail ends connected to grounding points of the PCB, the feed branch is located in the first radiator and corresponds to a feed point of the PCB in position, and the two second radiators are arranged in the first radiator, connected to the first radiator, and respectively located on two sides of the feed branch. The 5G MIMO antenna structure has a good radiation effect, a good isolation effect and a smaller size, and can meet the usage requirements of a 5G system below 6 GHz.