Abstract: Sound absorbers using distributed absorption units each having an extended neck are provided. The absorption units can be, for example, Helmholtz resonators with extended neck (HRENs). The absorption units can be distributed in a lateral fashion, for example, in a checkerboard fashion with laterally, non-diagonally adjacent units having a different extended neck length and/or diameter. Each absorption unit can be, for example, a cylinder-structure core sandwiched between a back wall and a perforated plate.

Abstract: The present disclosure provides an antenna, an antenna array and a communication system, and belongs to the field of communication technology. The antenna of the present disclosure includes: a phase shifter, including: a dielectric substrate, a first signal electrode, a first reference electrode, a second reference electrode, an interlayer insulating layer, at least one phase control unit; a first transmission structure and a second transmission structure; wherein the first transmission structure is electrically connected to one end of the first signal electrode, and the second transmission structure is electrically connected to the other end of the first signal electrode; and an antenna unit electrically connected to the second transmission structure.

Abstract: An acoustic transduction unit, a manufacturing method thereof and an acoustic transducer, and relates to the technical field of electronic devices. A first electrode is arranged on a first substrate, a support layer is arranged on a side, close to the first electrode, of the first substrate, and a conductive diaphragm layer is arranged on a side, away from the first substrate, of the support layer; a cavity is enclosed by the support layer, overlapping areas exist between orthographic projections of the first electrode, the conductive diaphragm layer and the cavity on the first substrate, and the conductive diaphragm layer serves as both a diaphragm layer and a second electrode in the acoustic transduction unit, it allows the conductive diaphragm layer to be configured as both the diaphragm layer and the second electrode, a layer structure of the acoustic transduction unit is simple.

Abstract: An antenna includes: a substrate; a first reference electrode on a first surface of the substrate; a radiating element on a second surface of the substrate, feeding directions of a first port and a second port of the radiating element are different; and at least one transmission structure on the second surface of the substrate and connected to at least one of the first port and the second port. The transmission structure includes: a signal electrode, a second reference electrode on at least one side of the signal electrode, and at least one membrane bridge; the signal electrode feeds a microwave signal into the radiating element, is positioned in a space surrounded by the membrane bridge and the substrate, and is insulated from the membrane bridge through an interlayer dielectric layer; orthographic projections of the membrane bridge and the second reference electrode on the substrate are overlapped.

Abstract: A phase shifter and an antenna device are provided. The phase shifter includes a substrate, a signal line on the substrate, ground lines in pairs on the substrate, and a capacitance adjusting component. Two ground lines in a same pair of ground lines are on both sides of the signal line and spaced apart from the signal line, respectively. The capacitance adjusting component includes a film bridge, and both ends of the film bridge are on the two ground lines, respectively. The signal line is in a space enclosed by the film bridge and the substrate. The capacitance adjusting component is configured to adjust a capacitance between the film bridge and the signal line to a target capacitance when the capacitance adjusting component receives a bias voltage, and the target capacitance has a linear correlation with a magnitude of the bias voltage.

Abstract: The present disclosure provides a phase shifter and an antenna. The phase shifter includes: a substrate; a signal electrode, and a first reference electrode and a second reference electrode respectively on two sides of an extending direction of the signal electrode; an interlayer insulating layer on the signal electrode, the first reference electrode and the second reference electrode; and at least one phase control unit each including a film bridge. At least part of the at least one phase control unit further includes at least one driving structure including at least a driving electrode; at least part of the at least one driving structure has a different height from a height of the signal electrode in a direction away from the substrate; the driving structure in each phase control unit is at least partially overlapped an orthographic projection of the film bridge on the substrate.

Abstract: A MEMS phase shifter, including: a substrate; a coplanar waveguide signal structure on the substrate; two coplanar waveguide ground wires respectively at two sides of the coplanar waveguide signal structure; insulating isolation layers respectively on the two coplanar waveguide ground wires; and a metal film bridge across and over the coplanar waveguide signal structure and forming a gap with the coplanar waveguide signal structure, both ends of the metal film bridge respectively attached to the insulating isolation layers on the two coplanar waveguide ground wires, wherein an insulating dielectric layer is provided on the coplanar waveguide signal structure, and the insulating dielectric layer comprises at least one concave part, which is concave in the direction towards the substrate, on the surface facing the metal film bridge.

Abstract: There is provided a phase shifter including a substrate, a signal line on the substrate, ground lines disposed in pairs on the substrate, and at least one film bridge. Two ground lines of the ground lines are on two sides of the signal line and are respectively spaced apart from the signal line. Each film bridge includes a plurality of connection walls and a bridge floor structure that is opposite to the substrate. The connection walls are respectively on the two ground lines. The bridge floor structure includes a phase shifting electrode and at least one pair of adsorption electrodes respectively connected to two sides of the phase shifting electrode. The phase shifting electrode is opposite to the signal line. Two adsorption electrodes in each pair are respectively opposite to the two ground lines, and are respectively connected to the connection walls on the two ground lines.

Abstract: An antenna includes: a substrate; a first reference electrode on a first surface of the substrate; a radiating element on a second surface of the substrate, feeding directions of a first port and a second port of the radiating element are different; and at least one transmission structure on the second surface of the substrate and connected to at least one of the first port and the second port. The transmission structure includes: a signal electrode, a second reference electrode on at least one side of the signal electrode, and at least one membrane bridge; the signal electrode feeds a microwave signal into the radiating element, is positioned in a space surrounded by the membrane bridge and the substrate, and is insulated from the membrane bridge through an interlayer dielectric layer; orthographic projections of the membrane bridge and the second reference electrode on the substrate are overlapped.

Abstract: The present disclosure provides a phase shifter and an antenna. The phase shifter includes: a substrate; a signal electrode, and a first reference electrode and a second reference electrode respectively on two sides of an extending direction of the signal electrode; an interlayer insulating layer on the signal electrode, the first reference electrode and the second reference electrode; and at least one phase control unit each including a film bridge. At least part of the at least one phase control unit further includes at least one driving structure including at least a driving electrode; at least part of the at least one driving structure has a different height from a height of the signal electrode in a direction away from the substrate; the driving structure in each phase control unit is at least partially overlapped an orthographic projection of the film bridge on the substrate.

Abstract: A phase shifter and a method for manufacturing the same are provided. The phase shifter includes a substrate, a signal line on the substrate, ground lines in pairs and on the substrate, and at least one film bridge on the substrate and spaced apart from the signal line. Two adjacent ground lines of the ground lines are on both sides of the signal line and spaced apart from the signal line, respectively, and both ends of each film bridge are on the two adjacent ground lines, respectively. The signal line is in a space surrounded by each film bridge and the substrate. Each film bridge includes a metal layer opposite to the signal line, the metal layer has a plurality of openings therein, and the plurality of openings penetrate through the metal layer in a thickness direction of the metal layer.

Abstract: The present disclosure discloses a dimming mirror and a manufacturing method thereof, and a dimming apparatus. The dimming mirror includes a dimming layer including a plurality of dimming units. Each of the dimming units includes a first driving structure and a second driving structure opposite to each other, and an elastic supporting structure disposed between the first driving structure and the second driving structure. The first and second driving structures and the elastic supporting structure enclose a dimming chamber. The first and second driving structures are configured to adjust a dimming angle of the dimming unit by adjusting a gap width of the dimming chamber, such that a response wavelength of the dimming mirror is adjusted. The present disclosure facilitates the improvement of the flexibility of the dimming mirror.

Abstract: An embodiment of the present disclosure provides a method for driving an acoustic transducer, including: obtaining a reference electrical signal according to a first electrical signal output by a first acoustic transducer element in a case where sound waves are not received by the first acoustic transducer element; obtaining an actual detected electrical signal according to a second electrical signal output by a second acoustic transducer element in a case where sound waves are received by the second acoustic transducer element; and performing a noise reduction process on the actual detected electrical signal according to the reference electrical signal to obtain a noise-reduced signal as a final output electrical signal of the second acoustic transducer element in a case where sound waves are received by the second acoustic transducer element. An embodiment of the present disclosure further provides an acoustic transducer.

Abstract: The present disclosure provides an acoustic transducer unit and a manufacturing method thereof, and an acoustic transducer, the acoustic transducer unit includes: a base substrate; a first electrode on the base substrate; a support pattern on a side of the first electrode away from the base substrate, which is enclosed into an accommodation groove, at least one release groove and at least one connection groove, an orthographic projection of the release groove on the base substrate is spaced apart from that of the accommodation groove on the base substrate, the connection groove is between the accommodation groove and the release groove to communicate them; a diaphragm pattern on the side of the first electrode away from the base substrate and capable of vibrating in the accommodation groove; a filling pattern in the release groove; a second electrode on a side of the diaphragm pattern away from the base substrate.

Abstract: A phased array antenna system is provided, including a feed structure and at least one phased array antenna element, wherein the at least one phased array antenna element includes a first impedance transformation unit, an MEMS phase-shifting multi-unit and an antenna. The first impedance transformation unit is connected to a feed structure, and the MEMS phase-shifting multi-unit is connected between the first impedance transformation unit and the antenna.

Abstract: The present disclosure provides a phase shifter, a method for fabricating the same, and an antenna. The phase shifter includes a substrate, first and second transmission lines spaced apart from each other on the substrate, and at least one phase control element on the substrate. Each phase control element includes a membrane bridge and a transmission line extension which is on the substrate, between the first and second transmission lines, and electrically coupled to the first transmission line; the membrane bridge is on a side of the transmission line extension distal to the substrate, opposite to and spaced apart from the transmission line extension, and electrically coupled to the second transmission line. The membrane bridge is configured to move a portion of the membrane bridge in response to the first and second transmission lines being applied with different voltages, to change a distance from the transmission line extension.

Abstract: A MEMS phase shifter, including: a substrate; a coplanar waveguide signal structure on the substrate; two coplanar waveguide ground wires respectively at two sides of the coplanar waveguide signal structure; insulating isolation layers respectively on the two coplanar waveguide ground wires; and a metal film bridge across and over the coplanar waveguide signal structure and forming a gap with the coplanar waveguide signal structure, both ends of the metal film bridge respectively attached to the insulating isolation layers on the two coplanar waveguide ground wires, wherein an insulating dielectric layer is provided on the coplanar waveguide signal structure, and the insulating dielectric layer comprises at least one concave part, which is concave in the direction towards the substrate, on the surface facing the metal film bridge.

Abstract: An acoustic transduction unit, a manufacturing method thereof and an acoustic transducer, and relates to the technical field of electronic devices. A first electrode is arranged on a first substrate, a support layer is arranged on a side, close to the first electrode, of the first substrate, and a conductive diaphragm layer is arranged on a side, away from the first substrate, of the support layer; a cavity is enclosed by the support layer, overlapping areas exist between orthographic projections of the first electrode, the conductive diaphragm layer and the cavity on the first substrate, and the conductive diaphragm layer serves as both a diaphragm layer and a second electrode in the acoustic transduction unit, it allows the conductive diaphragm layer to be configured as both the diaphragm layer and the second electrode, a layer structure of the acoustic transduction unit is simple.

Abstract: The present disclosure provides an antenna and a communication device, the antenna includes a dielectric substrate, a first radiating element, a second radiating element and a switching element, the second radiating element surrounds the first radiating element, the second radiating element is of an open-loop structure, at least one first groove is provided in the first radiating element, each switching element corresponds to one first groove, the switching element includes a membrane bridge and a signal electrode, the signal electrode is arranged on the dielectric substrate, coupled to the second radiating element, and insulated from the first radiating element, the membrane bridge is arranged on a side of the first radiating element away from the dielectric substrate, each membrane bridge crosses over one first groove, and at least part of the signal electrode is located in a space defined by the membrane bridge and the first groove.

Abstract: A phase shifter includes a substrate, a transmission line on the substrate and extending in a first direction, and first and second reference electrodes respectively on both sides of an extension direction of the transmission line. The transmission line includes signal line segments, any adjacent two of which have a gap therebetween to define a connection region. The phase shifter further includes at least one phase shifting unit each including: a film bridge extending in the first direction, a connection electrode extending in a second direction, and an interlayer insulating layer on a side of the connection electrode distal to the substrate. Both ends of the connection electrode are respectively connected with the first and second reference electrodes, and an orthogonal projection of the connection electrode on the substrate is in the connection region. Both ends of the film bridge are respectively connected with adjacent two signal line segments.