11results about How to "Low insertion loss" patented technology

This invention discloses a wideband, high-isolation single-pole five-throw switch chip, comprising six ports, two power ports, five control ports, twenty microstrip lines, one capacitor C1, twenty-five switching transistors, twenty-five gate resistors, and five voltage control modules. The six ports are port 1, port 2, port 3, port 4, port 5, and port 6; port 1 is the RF input port; ports 2, 3, 4, 5, and 6 are output ports. The RF input and output ports are connected via the two power ports, five control ports, twenty microstrip lines, one capacitor C1, twenty-five switching transistors, twenty-five gate resistors, and five voltage control modules. Compared to existing single-pole five-throw switches, this invention is integrated on a single chip, offering the advantage of small size. The use of voltage control modules significantly reduces the number of power supply modules, facilitating application.

The present invention discloses a low dielectric constant multifunctional electronic moisture-proof coating composition, and relates to the technical field of electronic materials and protective coatings, the composition comprises: a component A: 15-35% of a reaction type fluorine-silicon hybrid oligomer; the component B comprises 2%-8% of surface modified nanosheet barrier filler; the component C comprises 50%-75% of a green cosolvent system; the component D comprises 0.5%-3% of a multifunctional epoxy silane coupling agent; and the component E comprises 1%-5% of a photo-thermal dual-curing initiation system. The problems that in the prior art, the VOC emission of a fluorine-containing solvent is high, the compactness is insufficient due to filler sedimentation, and the water vapor permeability is high in a high-damp-heat environment are solved, through the quaternary synergistic effect, the low dielectric constant, high hydrophobicity, excellent moisture resistance and high adhesive force to various base materials are achieved, and the water-based paint is suitable for protection of high-frequency electronic devices.

This application discloses a three-dimensional ultra-wideband power divider, belonging to the field of radio frequency communication technology. It includes an input port, a strongly coupled line unit, a weakly coupled line unit, a first output port, and a second output port. The input port, strongly coupled line unit, and weakly coupled line unit are connected sequentially. The first terminal of the second end of the weakly coupled line unit is connected to the first output port, and the second terminal of the second end of the weakly coupled line unit is connected to the second output port. The weakly coupled line unit includes any number of coupling lines and multiple first resistors, with the multiple first resistors bridging between two coupling lines of the weakly coupled line unit. The strongly coupled line unit is a three-dimensional integrated vertical substrate circuit structure. This application overcomes the contradiction between ultra-wideband, high isolation, low loss, and mass production through a three-dimensional integrated structure, gradually changing coupling lines, and a multi-level bridging resistor network, providing a high-performance power divider solution for high-frequency communication systems.

This invention relates to the field of optoelectronic detection equipment, specifically an improved industrial optical fiber structure with adjustable transmission band and filtering function. To achieve the above objectives, the invention employs the following technical solution: it comprises an optical fiber head, a first optical fiber, a second optical fiber, a filtering component, and a third optical fiber; the first and second optical fibers are inserted into the optical fiber head from the left side to its left end face to form an optical path entrance; the second optical fiber continues to be inserted into the filtering component from the right; the third optical fiber is inserted into the filtering component from the right side and optically connected to the second optical fiber at the filter, completing the optical path transmission; by introducing a replaceable filter component into the optical fiber path, the optical fiber itself possesses filtering function, eliminating reliance on terminal equipment for band selection and significantly enhancing the flexibility of band selection; simultaneously, it achieves a glue-free, reusable connection method, improving maintenance efficiency and component reusability.

This invention discloses a design method for dual-polarized ultrawideband energy-selective materials. The method includes: integrating diodes with surface plasmon polaritons (SSPPs) and etching them onto the surface of a dielectric waveguide to form a centrosymmetric structure; wherein the SSPPs are periodic metal strips etched onto the dielectric waveguide surface, each SSPP metal strip integrating two diodes, symmetrically integrated on both sides of the metal strip, with etched gaps at the diodes connecting the metal strips; when the diodes are off, the metal strip transmission between the two diodes is below the asymptotic frequency. f 1. Electromagnetic waves; when the diode is turned on, the metal strip connecting the two diodes increases in equivalent length, and the asymptotic frequency decreases to 1. f 2, make f 2~ f Electromagnetic waves in the 1-band exhibit energy selectivity. This invention integrates a diode and a surface plasmon polariton (SSPP) structure and etches them onto the surface of a dielectric waveguide to achieve dual polarization, ultra-wideband coverage, and low cost.

The present application relates to the technical field of resonator, and discloses a surface acoustic wave resonator and a surface acoustic wave filter, which comprise a piezoelectric layer, and an interdigital transducer and a reflective grating structure arranged on the piezoelectric layer and arranged along a first direction, the reflective grating structure being located at the side of the interdigital transducer; the reflective grating structure comprises a plurality of unit reflective gratings arranged along the first direction, and the finger strips of each unit reflective grating extend along a second direction; the structure of each unit reflective grating is an interdigital reflective grating, a short-circuit reflective grating or an open-circuit reflective grating; in the reflective grating structure, at least one unit reflective grating is an interdigital reflective grating, and the unit reflective gratings other than the interdigital reflective grating are one or both of a short-circuit reflective grating or an open-circuit reflective grating. The present application can weaken the influence of the longitudinal wave of the surface acoustic wave resonator on the filter passband, reduce the insertion loss, improve the flatness of the filter passband, and realize a surface acoustic wave device with high stability and low loss.

This invention discloses an all-fiber integrated electro-optic crystal electric field probe and demodulation device. The electro-optic crystal electric field probe includes: a polarization-maintaining fiber, a first glass sleeve, a second glass sleeve, a collimating lens, a quarter-wave plate, an electro-optic crystal, and a reflective film. The polarization-maintaining fiber is fixedly connected to the first glass sleeve, the first glass sleeve is fixedly connected to the second glass sleeve, the polarization-maintaining fiber is connected to the collimating lens, the collimating lens is connected to the quarter-wave plate, the quarter-wave plate is connected to the electro-optic crystal, and the electro-optic crystal is connected to the reflective film. The collimating lens and the quarter-wave plate are disposed inside the second glass sleeve. This invention solves the problems of unstable electric field measurement caused by the difficulty in integrating space optical elements, susceptibility to vibration, large size, and difficulty in coupling, and improves the sensitivity and stability of the measurement device.

This invention discloses a broadband absorption structure with independently adjustable polarization frequency, belonging to the field of frequency-selective absorber technology. The structure comprises six alternating layers of ideal conductor PEC frequency-selective surfaces and three layers of F4B dielectric substrate. The frequency-selective surfaces are divided into lossy and lossless arrays. Both types of arrays consist of two orthogonal sublayers arranged in the same manner. All sublayers are printed on the dielectric substrate and isolated from each other by air layers. Both the lossy and lossless arrays integrate varactor diodes for independently controlling the transmission windows of TE-polarized and TM-polarized incident waves. This invention achieves true independent polarization frequency modulation, overcoming the shortcomings of traditional structures that cannot achieve independent polarization characteristics. It allows independent adjustment of the transmission frequencies of TE and TM polarizations without affecting the transmission and control response of cross-polarized waves.

This invention discloses an optical path system for an optical switch, comprising: a first single-axis crystal, a second single-axis crystal, a polarization combining prism, a total internal reflection prism, a first fiber collimator, a second fiber collimator, a third fiber collimator, a motor, and a motor controller; both the first and second single-axis crystals are cylindrical and placed with their optical axes aligned; the polarization combining prism and the total internal reflection prism are applied to radially symmetrical positions on the exit circular surface of the second single-axis crystal, and the two prisms are placed perpendicularly, with the polarization combining prism on top and the total internal reflection prism on the bottom; the first fiber collimator is located at the input end on the incident circular surface of the first single-axis crystal, the second fiber collimator is located at the output end on the exit circular surface of the second single-axis crystal, and the third fiber collimator is located at the output end of the polarization combining prism; the motor controller is used to control the rotation of the motor, thereby controlling the rotation of the second single-axis crystal.

This invention relates to the field of radio frequency (RF) microwave communication, and particularly to an RF burn-out protection circuit and a high-power RF switch. The RF burn-out protection circuit of this invention includes a first 3dB coupler, a second 3dB coupler, a first parallel unit, a second parallel unit, a first matched load, a second matched load, a first RF circuit, and a second RF circuit. The RF burn-out protection circuit and high-power RF switch of this invention have high power capacity, low insertion loss, high isolation, stable VSWR performance, and are flexible in application and low in cost, possessing broad application prospects and value.

This application relates to a high-frequency relay, including an electromagnetic part comprising multiple metal components; a contact portion disposed on one side of the electromagnetic part along a first direction, the contact portion including a moving spring assembly and a stationary spring; a shielding cover disposed on the side of the stationary spring facing the electromagnetic part; at least a portion of the stationary spring is located inside the shielding cover, and at least a portion of the moving spring assembly passes through the shielding cover; wherein the shielding cover has a grounding terminal; one end of a conductive connector is electrically connected to at least one of the multiple metal components, and the other end is electrically connected to the shielding cover and grounded. By providing a conductive connector connecting the metal components of the electromagnetic part and the shielding cover, a grounding path is provided for the metal components in the electromagnetic part, thereby eliminating parasitic coupling and secondary radiation effects caused by the proximity of the metal components in the electromagnetic part to the high-frequency operating contact portion, thus reducing crosstalk and interference coupling of the electromagnetic part to the high-frequency signal of the contact portion, and ensuring the integrity and transmission efficiency of the high-frequency signal.