10results about How to "Increase the withstand power" patented technology

The invention relates to the technical field of cable assemblies, and provides an airtight armor low-loss radio frequency cable and a manufacturing method thereof. The cable comprises a low-loss radio frequency cable body serving as a trunk, and the two ends of the low-loss radio frequency cable body are connected with connectors used for connecting a cable assembly with the outside; the manufacturing method comprises the steps that a low-loss radio frequency cable is adopted as a trunk of the cable assembly, a polyimide insulating layer and a multi-layer microporous film are wrapped outside a wire core in the low-loss radio frequency cable, and the low-loss radio frequency cable is formed through combination; according to the invention, the low-loss radio frequency cable is adopted, and the polyimide insulating material is wrapped outside the cable, so that the power resistance and the average service power of the cable are improved. Meanwhile, the low-loss radio frequency cable reduces standing waves and loss, and ensures stable transmission and reliability. Silicone rubber is coated between the armor corrugated pipe and the connector, and the armor corrugated pipe and the connector are connected through the pressing sleeve, so that the air tightness of the cable assembly and the reliability of the joint are enhanced.

The present application relates to a kind of full metal circular polarization frequency scanning antennas based on artificial surface plasmons, belong to frequency scanning antenna technical field.The antenna includes three parts of feed waveguide, radiation structure and metal base plate.The radiation structure includes metal ground plate, artificial surface plasmons transmission structure by multiple staggered stepped rectangular wave column body equidistant arrangement, the transmission structure side for realizing TE 10 to TM mode conversion Graduated height transmission structure, and multiple metal cylindrical radiation units periodically arranged.The radiation unit is electromagnetically coupled with transmission structure, excitation space high harmonic wave realizes leaky wave radiation, and generates the orthogonal electric field of phase difference 90 ° and realizes circular polarization.The present application adopts full metal structure, easy to process, resistant to high power, robustness is strong;In 190 GHz-205 GHz frequency band, beam scanning range is-20 ° to +2 °, and main radiation direction axis ratio is less than 3 dB.The present application solves the technical problems that existing leaky wave antenna is difficult to realize circular polarization radiation in terahertz frequency band, structure is complex.

The invention discloses a 3μm fiber laser based on fluoride-doped phase-shift grating feedback, which belongs to the technical field of fiber lasers. The invention comprises an LD pumped laser source group, a fiber beam combiner, an optical isolator, a fiber grating, a first high-germanium-doped fiber, a second high-germanium-doped fiber and a double-cladding Ho-doped fiber engraved with a random phase-shift grating. 3+ The present invention is composed of a double cladding doped with Ho 3+ Random phase-shifted gratings are written on fluoride optical fibers and pumped by a pump source laser. 3+ It absorbs pump light and generates stimulated radiation. When the output laser threshold is reached, random laser output is generated. The pump laser oscillates back and forth through the fiber grating reflection, which can effectively reduce the pump threshold power and improve the pump efficiency. The laser has the characteristics of low threshold power, high conversion efficiency, compact structure, and all-fiber.

The application discloses a PIN diode with an arc-shaped gradually-changing tube core, which comprises a substrate and a diode packaging structure, wherein the diode packaging structure is arranged on the substrate; the diode packaging structure comprises a first anode metal plate, an anode air bridge, a tube core, a cathode metal plate and an N-type high-doped layer; the first anode metal plate is connected with a second anode metal through the anode air bridge; the tube core comprises the second anode metal, a P-type high-doped layer and a semiconductor I layer; the second anode metal plate is in contact with the P-type high-doped layer to form an anode ohmic contact electrode; the cathode metal plate is in contact with the N-type high-doped layer to form a cathode ohmic contact electrode; the P-type high-doped layer is arranged directly below the second anode metal plate; and the semiconductor I layer is arranged between the P-type high-doped layer and the N-type high-doped layer. The application can eliminate the electric field concentration effect and improve the maximum withstand power of the diode by adjusting the gradually-changing shape.

The invention discloses a high-performance surface acoustic wave filter and a forming method thereof.The filter formed through the method comprises a substrate layer, a piezoelectric layer and a resonator metal layer, the upper surface of an electrode connecting area in the resonator metal layer is further covered with a covering metal layer, and a channel cavity is formed in the portion, below the resonator metal layer, of the substrate layer; the range of the channel cavity covers the interdigital transducer. The forming method comprises the following steps: S1, providing a substrate layer and forming a channel cavity; s2, filling the channel cavity with a sacrificial layer; s3, forming an upper heat-conducting metal layer on the sacrificial layer; s4, deriving a sacrificial layer; s5, forming a piezoelectric layer; and S6, generating a resonator metal layer and a covering metal layer. The surface acoustic wave filter formed by the forming method can obstruct the transmission of body waves and improve the tolerance power at the same time.

The invention belongs to the technical field of antennas, and relates to a protection antenna based on a metasurface, which comprises a dielectric layer, a radiation layer arranged on the upper surface of the dielectric layer, a floor layer arranged on the lower surface of the dielectric layer and a feed assembly, the radiation layer comprises a plurality of radiation patches which are arranged in a rectangular array so as to form a metasurface of which the length direction is parallel or vertical to the length direction of the dielectric layer; a diode is arranged between any two adjacent radiation patches along the length direction or the width direction of the metasurface; when the metasurface receives a normal signal, the diode is in a cut-off state; when the metasurface receives electromagnetic attack, the diode is in a conducting state; and electromagnetic protection of the antenna is realized through state switching of the diodes. According to the invention, the advantages of wide working frequency band, high tolerance power, low insertion loss and high integration level can be realized at the same time.

The invention discloses an integrated power-resistant amplitude-limiting low-noise amplifier circuit based on a gate-drain short-circuit transistor and a low-noise amplifier. The amplitude-limiting low-noise amplifier circuit comprises an amplitude-limiting circuit and a low-noise amplifier circuit, the amplitude limiting circuit comprises one or more amplitude limiting circuit branches which are connected in series; the amplitude limiting circuit branch comprises 2N transistors, N is an integer, and the grid electrode and the drain electrode of each transistor are in short circuit. The grid electrode and the drain electrode of the transistor are short-circuited, so that the tolerance power of the integrated amplitude-limiting low-noise amplifier circuit is improved.

The invention relates to a high-power ultra-wideband antenna capable of integrating a radio frequency front end, and the antenna comprises an antenna body which comprises a left arm and a right arm, the left arm is provided with a left arm cover plate, and the left arm and the right arm are respectively provided with an installation space; an electric dipole; a magnetic dipole formed by the installation space of the right arm; the feed structure is arranged on the antenna body; the high-power source and the control panel are both arranged on the left arm cover plate, and the control panel is used for generating extremely narrow pulses; the antenna body, the electric dipole, the magnetic dipole and the feed structure are all metal structures. In the embodiment, the antenna adopts a metal structure, so that the antenna has the characteristic of high tolerance power; the high-power source and the control board are integrated on the antenna, the magnetic dipole is formed by the installation space of the right arm of the antenna, an installation structure does not need to be additionally arranged, the space is saved, the antenna structure is more compact, and the antenna has the advantages of being low in cost, easy to manufacture and good in application prospect.

The invention relates to the technical field of semiconductors, in particular to a surface acoustic wave device and a preparation method thereof. The surface acoustic wave device comprises a substrate, a bonding pad, an interdigital transducer, a heat conduction metal structure and a heat dissipation metal layer. The substrate is provided with a first surface and a second surface which are opposite to each other along the thickness direction of the substrate; the bonding pad and the interdigital transducer are arranged on the first surface; the bonding pad is connected with the interdigital transducer through a metal wiring structure; the interdigital transducers are connected through a metal wiring structure; the heat dissipation metal layer is arranged on the second surface; one end of the heat-conducting metal structure is arranged on the first surface, and the other end is connected with the heat-dissipating metal layer; and the heat conduction metal structure is not in contact with the interdigital transducer. Therefore, the heat conduction metal belongs to heat dissipation metal connection, heat of the surface area of the chip is led to the back surface of the chip, the heat dissipation area is increased, and the heat dissipation capability of the product is enhanced.

This utility model discloses a phased array radar phase shifter data acquisition and testing system, belonging to the field of microwave and radio frequency technology. The system includes a vector network analyzer, a main control subsystem, a temperature monitoring subsystem, and a waveguide array testing subsystem. This utility model employs a layered, staggered method with equal-length straight and curved waveguides to extract microwave signals, resulting in a compact structure and small overall size. It can be used in conjunction with the device under test (DUT) for environmental adaptability testing and temperature and humidity screening testing, overcoming the problems of large size and high cost of matrix switch box testing equipment. The design of the radio frequency coaxial switch group overcomes the problem of generally low power tolerance in electronic switches. The system has a built-in temperature sensor with temperature protection settings; exceeding the protection temperature triggers a temperature alarm and subsequently power-off protection, ensuring system safety. It can be widely applied to various environmental testing scenarios for radar antenna phase shifters, T / R components, power dividers, etc., and general-purpose modules can be replaced according to the actual testing scenario.