12results about How to "Improve radiation efficiency" patented technology

An ultra-wideband end-fire antenna with a common aperture embedded in a metal carrier includes a metal cavity with a coaxial cable compartment on one side. A radiator module is connected to the bottom of the metal cavity via a radiator fixing slot. The radiator module includes a common aperture antenna substrate. A low-frequency radiator is printed on the side of the common aperture antenna substrate closer to the coaxial cable compartment, and a high-frequency radiator is printed on the side farther from the coaxial cable compartment. This invention utilizes a dual-band antenna in a common aperture design to enhance the channel capacity and anti-fading capability of the communication system. At the same time, by achieving the antenna's carrier conformal characteristics, high isolation, and miniaturization, it enriches the antenna's application scenarios and improves the overall performance of the communication system.

The application discloses a planar vortex orbit angular momentum antenna based on artificial surface plasmons. The application comprises a resonant antenna and a feeding system; the resonant antenna comprises an artificial surface plasmon metal ring and a first dielectric plate; the feeding system comprises a second dielectric plate, an air dielectric layer, a metal ground, a third dielectric plate and a feeding network; two microstrip stubs are arranged on the third dielectric plate, and a small metal disc is arranged at the end of each microstrip stub; the microstrip stubs are connected with the feeding network through metal vias; the surface impedance of the slotted unit of each artificial surface plasmon unit in the artificial surface plasmon metal ring is the same or different. The application can emit a vortex wave beam carrying a precisely defined orbit angular momentum on a plane, and through synthesizing multiple wave beams at a fixed frequency, the multiple wave beams can be superimposed to form a new wave beam, so that the shape of the wave beam can be controlled. The wave beam scanning can be realized by adjusting the surface impedance distribution of each wave beam.

This invention discloses an X-band direction-finding antenna and antenna device. The antenna includes an array layer, a cavity layer, and a network layer stacked sequentially from front to back. An antenna array is disposed on the array layer, and an array port is disposed on the antenna array. The array port is connected to the network layer and an output terminal disposed on the antenna through the cavity layer. The antenna device includes an antenna and an antenna support, with the antenna disposed on the antenna support. This X-band direction-finding antenna has a high degree of integration, small size, and light weight, achieving miniaturization. Simultaneously, it exhibits a low standing wave ratio and high element radiation efficiency in the X-band.

The invention provides an electronic device. The electronic equipment comprises a front shell, a floor and an antenna assembly, the front shell comprises a frame part, the floor comprises a first edge and a second edge which are connected in a bending manner, the antenna assembly comprises a first antenna, and the first antenna comprises a first radiator and a first feed source; at least part of the first radiating body is arranged corresponding to the long side of the floor, the first radiating body comprises a first main radiating body and a first parasitic radiating body, the first main radiating body comprises a first end, a first feeding point and a first coupling end which are arranged in sequence, and the first parasitic radiating body comprises a second coupling end and a second end which are arranged in sequence; the first main radiating body and the first parasitic radiating body are positioned on the frame part; the first feed source is electrically connected to the first feed point, excites a first resonant mode to support a first sub-band of a first target band, and a second resonant mode to support a second sub-band of the first target band, the first resonant mode including a parasitic mode of the first parasitic radiator, and the second resonant mode including a zero-order mode of the floor.

This invention belongs to the field of ultrasonic sensing and microelectromechanical systems (MEMS) packaging technology, specifically relating to a multi-segment acoustic packaging structure and optimization method for a PMUT ultrasonic transducer. The multi-segment acoustic packaging structure for a PMUT ultrasonic transducer includes a base, a PMUT chip, and an acoustic cavity. The acoustic cavity includes a front cavity section, a tapered transition section, a conduit section, and a waterproof and acoustically permeable membrane. A first minimum gap is formed between the radiating surface of the PMUT chip and the bottom surface of the front cavity section; a second minimum gap is formed between the waterproof and acoustically permeable membrane and the outlet end of the conduit section. Furthermore, the acoustic cavity serves as either a transmitter or a receiver. When used as a transmitter, the depth of the front cavity section is greater than that of the front cavity section when used as a receiver, and the inner diameter of the conduit section is smaller than that of the conduit section when used as a receiver. This packaging structure, through optimization of geometric parameters and acoustic characteristics, achieves differentiated performance improvements for the transmitter and receiver, increasing the transmitted sound pressure and directivity, and expanding the bandwidth and receiving angle of the receiver.

The application provides an antenna structure and a wireless communication device with the antenna structure. The antenna structure comprises a first substrate, a second substrate, at least one first radiation unit, a feed source and a ground plane. The first substrate is bent to form a receiving space for receiving the second substrate. The feed source is arranged on a first surface of the second substrate, the ground plane is arranged on a second surface of the second substrate, and the at least one first radiation unit is arranged on an upper surface of the first substrate. The feed source is electrically connected to the at least one first radiation unit to feed the first radiation unit with an electrical signal, and the ground plane is electrically connected to the at least one first radiation unit to provide the first radiation unit with a ground. The antenna structure provided by the application has higher antenna gain and can meet the design requirements of antenna operation.

The present disclosure relates to a middle frame assembly and an electronic device, the middle frame assembly comprising a middle frame body and a tuning circuit, the middle frame body being provided with at least two adjacent antenna branches, a gap being provided between the adjacent antenna branches, the tuning circuit being provided at the gap and connected to the two adjacent antenna branches; wherein at least one of the two adjacent antenna branches operates in a traveling wave mode, and the tuning circuit is used for transmitting electromagnetic waves between the two adjacent antenna branches, so that one of the two adjacent antenna branches acts as a magnetic parasitic branch of the other antenna branch. The present disclosure connects the two adjacent antenna branches by providing the tuning circuit at the gap, transmits electromagnetic waves between the antenna branches, configures the two adjacent antenna branches as a magnetic parasitic mode in the same direction, generates a superimposed magnetic field in the same direction, and thus improves the radiation efficiency of the antenna.

This disclosure relates to an antenna structure and an electronic device. The antenna structure includes: a first radiator for radiating satellite frequency band signals; a second radiator, perpendicular to the extension direction of the first radiator, for radiating cellular frequency band signals; a third radiator, which forms a gap with the end of the second radiator away from the first radiator, for radiating both satellite frequency band signals and cellular frequency band signals; and a first antenna switch, one end of which is grounded and the other end electrically connected to the end of the second radiator away from the third radiator; wherein, when the third radiator operates in satellite frequency band signal mode, the feed point of the second radiator switches to an off state, the first antenna switch switches to an on state, and the second radiator and the third radiator couple to generate resonance.

The utility model provides a kind of double-frequency wave trap ultra-wideband antenna based on double C-shaped structure, including dielectric substrate, C-shaped radiating patch unit, microstrip transmission line and two coplanar waveguide ground planes.C-shaped radiating patch unit is printed in the upper surface middle part of dielectric substrate, including first C-shaped radiating patch and second C-shaped radiating patch;Microstrip transmission line is printed on the upper surface of dielectric substrate, and microstrip transmission line is guided to C-shaped radiating patch unit from the edge of dielectric substrate and is connected therewith;Two coplanar waveguide ground planes are printed on the upper surface of dielectric substrate, and are symmetrically arranged on the both sides of microstrip transmission line and are provided with first gap between microstrip transmission line.

The utility model relates to a lamp tube clamping type warmer, including the shell, is provided with first heating area and second heating area on the shell, and first heating area and second heating area are communicated in the shell inside, first heating area and second heating area have different radiation direction, the reflector board is located in the inside of first heating area, the lamp tube is located in the inside of first heating area, the shell inside is provided with the mounting plate who penetrates first heating area and second heating area, the outside of mounting plate is equipped with the card and carries out the constraint to the lamp tube in axial direction, the utility model has the advantages of: through the design that the mounting plate is radially restrained to the lamp tube, the card is axially restrained, the installation stability of the lamp tube and mounting plate is guaranteed, simultaneously, the card and mounting plate are all simple sheet body structure, and production assembly flow is simple, and production cost is reduced, and the design of limiting buckle and limiting male prevents the card from falling off automatically, and the connection stability of card and lamp tube, mounting plate is ensured.

This invention provides a high-gain antenna and a mobile terminal device. The high-gain antenna includes a substrate, a first radiating element, and a second radiating element. The first radiating element is located on one side of the substrate, and the second radiating element is located on the other side of the substrate. The first radiating element includes a feed point, a ground point, and a first radiating component, a second radiating component, and a third radiating component. The second radiating element includes a fourth radiating component, a fifth radiating component, a sixth radiating component, and a seventh radiating component. The fourth, fifth, sixth, and seventh radiating components are sequentially coupled and arranged on the substrate, and are coupled to the first, second, and third radiating components. This high-gain antenna not only enables the entire antenna to transmit and receive signals, but also widens the antenna bandwidth, enhances antenna radiation efficiency, and reduces production costs.

This disclosure provides a magnetic field positioning system. The magnetic field positioning system includes at least two magnetoelectric transmitting nodes, at least one magnetoelectric receiving node, and a position determination module. Each magnetoelectric transmitting node includes a signal generator, a voltage amplification circuit, and a first magnetoelectric device connected in sequence. Each magnetoelectric receiving node includes a second magnetoelectric device, a charge amplification circuit, and an amplitude detection circuit connected in sequence. The position determination module is used to determine the distance from each magnetoelectric transmitting node to the magnetoelectric receiving node, and to determine the position of the magnetoelectric receiving node based on the position of each magnetoelectric transmitting node and the distance from each magnetoelectric transmitting node to the magnetoelectric receiving node. This disclosure can effectively increase the maximum measurable distance of magnetic field positioning, effectively solve the problem of needing to deploy a large number of transmitting nodes in a limited space, and reduce positioning errors. It can be used on a large scale in various complex electromagnetic environment industrial scenarios.