11results about How to "Avoid signal attenuation" patented technology

The utility model discloses a real-time signal transmission device, which belongs to the technical field of signal transmission, and comprises an outer shell and an inner shell, the upper ends of the outer shell and the inner shell are open, the two ends of the inner wall of the outer shell are provided with sliding chutes, the two ends of the inner shell are fixedly connected with sliding blocks matched with the sliding chutes, and the sliding blocks are connected with the sliding chutes. A plurality of signal transmission interfaces are installed at the end, away from the outer shell, of the inner shell, first threaded holes are formed in the two ends of the outer shell, limiting screws are in threaded connection with the interiors of the first threaded holes, and a plurality of limiting holes arranged at equal intervals are formed in the two ends of the inner shell. Stepless adjustment of the internal capacity of the device is achieved, when the optical fiber cable is long, the inner shell can be stretched to enlarge the storage space, and signal attenuation caused by excessive bending of the cable is avoided; when the cable is short, the inner shell can be compressed to reduce the size of the device, and the installation flexibility and the space utilization rate are remarkably improved.

The application relates to the technical field of circularly polarized antennas, and discloses a small-sized circularly polarized reconfigurable metasurface antenna for assisting satellite communication, which is provided with a dielectric layer provided with a plurality of metal through holes, metal resonance structures arranged on the upper and lower surfaces of the dielectric layer and a metal ground plate; the metal resonance structure comprises a plurality of metaline units arranged in a periodic mode along a horizontal direction, each metaline unit comprising: an upper metal stub, a metal main arm and a lower metal stub arranged in a sequential mode along a vertical direction; a first PIN diode is connected with the metal main arm at a positive electrode and connected with the upper metal stub at a negative electrode; a second PIN diode is connected with the lower metal stub at a positive electrode and connected with the metal main arm at a negative electrode; and the metal ground plate is connected with the metal stubs of the metal resonance structure through the metal through holes. PIN diodes are integrated between the metal main arm and the two side grounding metal stubs, the on and off states are switched by controlling the bias voltage, and the polarization direction is adaptively adjusted.

The utility model relates to a kind of projector device of built-in television stick Dongle, comprising: shell, its inside is equipped with the installation slot for accommodating television stick Dongle;Mainboard is fixed in the shell, its edge is provided with HDMI terminal, the plug interface of the HDMI terminal is directly opposite the lateral opening of the installation slot;The side wall of the installation slot is equipped with rib, the rib is configured to make the HDMI interface of television stick Dongle and the fixed structure of mainboard HDMI terminal after wirelessly plug-in;Box cover is locked by screw in the top of the shell, television stick Dongle is enclosed in the installation slot.By canceling all connecting wires and ATV adapter board, the HDMI interface of television stick Dongle and mainboard HDMI terminal are designed as the physical straight insertion structure without intermediary, ensure signal stable and reliable and connection firmness.

This utility model relates to the field of radio frequency connector technology and discloses a quick-plug radio frequency connector, including a male terminal and a female terminal. The outer wall of the male terminal connection is provided with an external thread, and the inner wall of the female terminal connection is provided with an internal thread. A limit block is provided inside the male terminal, and a male wire core is provided at the center of the limit block. A support block is provided inside the female terminal, and a female wire core is provided at the center of the support block. A plug-in port is provided on the side of the male terminal away from the female terminal, and a gap is provided between the male wire core and the plug-in port. A wiring port is provided on the side of the female terminal away from the male terminal, and a gap is provided between the female wire core and the wiring port. A wiring groove is provided on the side of the male wire core close to the female wire core, and the male wire core and the female wire core are connected through the wiring groove. A connecting component is provided between the male terminal and the female terminal for aligning and connecting the male wire core and the female wire core and for heat dissipation, which solves the problem that existing equipment cannot cool down in time.

This invention discloses a flexible piezoelectric sensor structure and fabrication method based on an h-BN / GaN heterojunction. The flexible piezoelectric sensor structure includes, from bottom to top, a flexible support substrate layer, a bottom electrode layer, a piezoelectric active layer, an electron dissipation layer, and a top electrode layer. The piezoelectric active layer is composed of a doped and activated n-type single-crystal GaN thin film. The electron dissipation layer is composed of a doped and activated n-type single-crystal GaN and a p-type h-BN two-dimensional thin film covering its surface, forming a p-BN / n-GaN heterojunction with a space charge region at the interface between the n-type single-crystal GaN and the p-type h-BN two-dimensional thin film. The fabrication process includes epitaxial growth of the piezoelectric active layer, interface cleaning and plasma activation, mechanical stacking of the electron dissipation layer, deposition of the bottom electrode layer, silicon substrate etching, debinding and cleaning, deposition of the top electrode layer, stacking and pressing of the flexible support substrate layer, and encapsulation. This invention can form a broad depletion layer, fundamentally eliminating the "free electron shielding effect."

The utility model discloses a ribbon optical cable, which comprises a fiber core unit, a shielding layer, a reinforcing layer and a weather-proof sheath layer, and is characterized in that the fiber core unit is formed by arranging a plurality of single-mode optical fibers at intervals along the length direction of the cross section of the ribbon optical cable; the shielding layer wraps the outer side of the fiber core unit, the shielding layer is provided with a plurality of hollow cavities on the cross section of the optical cable, and the hollow cavities are arranged among the single-mode optical fibers; the reinforcing layer coats the outer side of the shielding layer; the weather-proof sheath layer wraps the outer side of the reinforcing layer. According to the arrangement, the shielding layer between the fiber core unit and the reinforcing layer can shield eddy current generated by materials in the reinforcing layer in a high electromagnetic field environment, signal attenuation can be prevented, the shielding layer is provided with a plurality of hollow cavities on the cross section of the optical cable, each hollow cavity is arranged among the single-mode optical fibers, and due to the existence of the hollow cavities, the shielding layer can be used for shielding the eddy current generated by the materials in the reinforcing layer in a high electromagnetic field environment. The bending performance and the compression resistance of the ribbon optical cable are enhanced, the structural design of the optical cable is optimized, and the service life of the ribbon optical cable is prolonged.

The invention discloses a comprehensive entertainment network system for a floating liquefied gas carrier. Comprising a network system main cabinet (1), a network system main switch (2), an entertainment system main cabinet (4), an entertainment system main switch (5), a first network system branch cabinet (10), a second network system branch cabinet (13), a third network system branch cabinet (16), a first network system branch switch (11), a second network system branch switch (14), a third network system branch switch (17) and a first entertainment system branch switch (12). The integrated entertainment network system comprises a first entertainment system branch switch (11), a second entertainment system branch switch (15), a third entertainment system branch switch (18), an entertainment system network socket (19), a television (20) and a network system socket (21). By optimizing the system design, cables and space are saved, the cost is reduced, and practicability is achieved.

The invention belongs to the technical field of voice interaction and broadcast control, and particularly relates to an AI voice broadcast signal processing device and method. Comprising a telephone interaction information processing module which is used for receiving a user telephone, carrying out voice recognition and converting a user demand into text information; the broadcast demand collection and classification processing module is used for analyzing the text information and extracting key information required by broadcast; and the broadcast system control and broadcast information transmission module is used for generating broadcast audio and initiating a broadcast instruction to a broadcast terminal. The beneficial effects of the system are that the system is especially suitable for emergency broadcasting and information issuing scenes of factories, long-distance high-quality signal transmission is realized by adopting the audio optical transceiver, signal attenuation is avoided, and the sound quality and the coverage range of broadcasting are ensured.

The utility model belongs to the technical field of cables, and particularly relates to a high-temperature-resistant computer cable which comprises a cable body. The cable is sequentially provided with a conductor, an insulating layer, a dynamic heat dissipation layer and a sheath layer from inside to outside. The insulating layer is divided into an inner insulating layer and an outer insulating layer, thermistor wires are embedded in meshes of the dynamic heat dissipation layer, and the space between the inner layer and the outer layer of the sheath layer is filled with expansion rubber strips. The cable 1 of the utility model can form double heat-resistant functions of resistance and slow reflection in use, can automatically block oxygen when encountering open fire so as to prevent flames from spreading inwards and along the flame, and can finally disperse stress in bending so as to inhibit cracking and protect the integrity of the whole structure.

This utility model relates to a heat-dissipating receiver housing in the field of receivers. It includes a middle housing with a shelf inside. Compression springs are installed on both the left and right sides of the inner wall of the shelf, and clamping plates are attached to the ends of the compression springs. Thermally conductive silicone blocks are installed around the top surface of the shelf. After a circuit board is placed in the inner cavity of the shelf, the compression springs on the shelf drive the clamping plates closer to the circuit board, causing the clamping plates to engage with the outer side of the circuit board. Compared to traditional screw fixing methods, this mechanism allows for quick tool-free assembly and disassembly. The thermally conductive silicone blocks attract and dissipate the heat generated by the circuit board during operation, thus achieving efficient heat dissipation and preventing heat accumulation that accelerates component aging.

The utility model relates to the technical field of stone type judgment devices, in particular to a double-spectrum stone type analysis device based on laser-induced breakdown and laser-induced fluorescence. According to the utility model, two technologies of laser-induced breakdown spectroscopy and laser-induced fluorescence are combined. The LIBS technology can be used for analyzing the element composition in the calculus, and the LIF technology can be used for detecting the organic components in the calculus. The two kinds of signals are collected through the multi-channel spectrometer and are comprehensively analyzed through the analysis terminal, and compared with a single technology, more comprehensive stone information can be obtained, so that the accuracy of stone type analysis is effectively improved. According to the multi-technology fusion mode, richer data support is provided for accurate judgment of the calculus type, clinicians can know the characteristics of the calculus more accurately, and a more appropriate treatment scheme is formulated.