34results about How to "Guaranteed Impedance Matching" patented technology

The application provides an optical module, which comprises a circuit board. Laser driving chips on driving chip bonding pads, flexible board bonding pads, and differential signal wires for connectingthe flexible board bonding pads with the driving chip bonding pads are arranged on a top signal layer of the circuit board. Ground holes for differential signal returning are formed around each groupof flexible board bonding pads, driving chip bonding pads, and differential signal wires on the top signal layer, and a first grounding layer and a second grounding layer in the circuit board, so that a signal return path is reduced. Moreover, metal layers are laid in forward projection areas of the flexible board bonding pads and hollow areas are formed in the forward projection areas of the driving chip bonding pads; and metal layers are laid in the forward projection areas of the driving chip bonding pads on the second grounding layer so as to provide a signal backflow ground. On the basisof the design, the high-frequency performance coherence resistance can be improved and thus the impedance continuity between the laser driving chip and the flexible circuit board in working of the optical module is improved.

The invention discloses a radio frequency coaxial connector, and provides an improved radio frequency coaxial connector. The radio frequency coaxial connector comprises a body, wherein the body comprises a first socket, a second socket and an adapter, the first socket and the second socket are connected through the adapter, and signal connection between the first socket and the second socket is carried out through the adapter. The radio frequency coaxial connector has the advantages of being simple in structure, firm, durable, convenient to connect and high in signal transmission performance. The radio frequency coaxial connector is mainly used for circuit board radio frequency connection.

A production method for three cleaving transmission transformer belongs to transformer technology field and solves impedance matching problem of three low press windings. It counts electric field, magnetic field, short circuit impedance, short circuit intensity and leak magnetic field of transformer to match impedance of three low press windings. a. Count voltage and current parameter. b. Select iron core parameter. c. Select loop parameter. d. Count short circuit impedance. e. Count spoilage, temperature rise and mechanical power. f. Confirm structure collocation type and parameter. It finds the rule about the three cleaving transmission transformer to solve the problem of high voltage winding circumfluence and keep the transformer with natural function at all kinds of load condition. When satisfied the coequal load condition, it can reduce 50% area and 15-20%spoilage with high over loading ability and its sequential course can reach to 115% of rated capability.

The invention provides a electrical connector, wherein, even in the circumstances that the space between a ground floor and the surface of a basement of the connector is minimum, the electrical connector can easily achieve the matching of a center contact and the ground floor of the basement as well as the impedance matching of the contact center and a external conductor, and the electrical connector can reduce the overall height and weight, the connector can be installed on two surfaces of the basement. The aim of the invention can be achieved by installing the electrical connector on the basement, the electrical connector comprises the center contact with a contact part, a maintaining part and a connecting part, a insulator and the external conductor; wherein, when the ground floor is installed into the basement, the maintaining part of the contact center is bent ,so that the contact center is roughly parallel to the surface of the basement installed with the electrical connector tomaintain the distance of the maintaining part between the ground floor and the bending between 0.5to1.5 mm, and the bending is roughly parallel to the surface of the basement, impedance matching is adjustable.

The invention relates to the technical field of a mobile communication base station antenna, aims to solve problems that processing difficulty increases because of small sizes of chambers and designing chambers in different sizes are required by phase shifters in different frequency bands existing in ultrahigh frequency phase shifters in the prior art and provides a phase shifter. The phase shifter comprises a rectangular chamber with two end openings, a power division feed network unit fixedly mounted in the rectangular chamber, two medium moving sheets arranged in the rectangular chamber, and a pull rod fixedly connected with the two medium moving sheets, wherein four transverse tail ends of the medium moving sheets are provided with direction holes, a side wall of the rectangular chamber is provided with multiple sets of openings used for eliminating resonance, and every two openings are arranged in parallel. The phase shifter is advantaged in that the side wall of the rectangular chamber is provided with the rectangular openings in different sizes, the higher mode appearance environment is broken by the openings, and a problem of prominent system resonance existing in an ultrahigh frequency micro phase shifter is solved.

The invention discloses a double-rotational parabolic dipole antenna, which is used for solving of low gain caused by deviation of a main beam direction of the current standard radiation source antenna from a horizontal direction with different frequencies. The double-rotation parabolic dipole antenna comprises an upper oscillator, a lower oscillator and a connection device, wherein the outer surfaces of the upper oscillator and the lower oscillator are rotational paraboloids with same shape, the connection device comprises a coaxial connector, an inner conductor and an insulator, and the end surface of a second end of the insulator is conformal to the outer surface of the upper oscillator. As the typical embodiment of the invention, the exponential term coefficient of a rotational curvilinear equation of the rotational paraboloids is 0.06, the slope is 0.1, the radiation distance is 2 millimeters, and the maximum radius value of the upper oscillator and the lower oscillator is 48.5 millimeters. With the double-rotational parabolic dipole antenna disclosed by the typical embodiment of the invention, a horizontal omnibearing standard radiation field in a range of ultra wide band (1GHz to 18GHz) is achieved; and with the adoption of a mode of changing oscillator gap to a curve distance, the gain of the ultra wide band dipole antenna in the horizontal direction is enhanced.

The invention discloses a single-fiber quantum key distribution system classic signal driving and detection and discrimination system. A high-speed modulation amplifier has a classic signal input end for inputting classic signals; an active microwave integrated amplifier is used for carrying out second-stage amplification on modulation amplified output signals and outputting the signals to a classic light laser; the input end of a classic optical detector is connected with the output end of the classic light laser; the output end of the classic optical detector is connected with the input end of a high-speed voltage comparator; the output signal of the classic light laser is input to the classic optical detector; detection output signals of the classic optical detector are input to the high-speed voltage comparator; and the high-speed voltage comparator is used for carrying out discrimination outputting on the detection output signals. The invention also discloses a single-fiber quantum key distribution system classic signal driving and detection and discrimination method. The method and system can guarantee that the classic signals are not distorted, provide a background current for the classic light laser, and ensure impedance matching of the output signals.

The present invention belongs to the radio receiving-transmitting device field. Aiming at the technical problem of the bandwidth of a conventional monopole antenna in a low-frequency (being smaller than 100MHz) segment, the present invention concretely discloses a low-frequency loading antenna. The low-frequency loading antenna comprises: a monopole antenna which is connected with a feeder; a lumped loading portion being connected in series with the monopole antenna; and an impedance conversion portion configured to realize that the impedance of a feed terminal of the monopole antenna is equal to the characteristic impedance of the feeder, wherein the lumped loading portion comprises an inductor and a resistor, and the inductor and the resistor are connected in series with the monopole antenna.

The invention belongs to the technical field of antenna engineering and wireless communication, and relates to an all-dielectric integrated ultra-wideband low-profile polymorphic conformal phased array antenna. The antenna is a planar array or a conformal array composed of array elements; each array element comprises a wide-angle broadband matching layer, a feed balun layer, a radiation antenna layer, an artificial magnetic surface layer, a dielectric isolation layer and a ground plate which are stacked from top to bottom. According to the all-dielectric integrated ultra-wideband low-profile polymorphic conformal phased array antenna of the invention, a vertical feed balun in a traditional continuous current surface antenna is replaced by a feed patch which is capacitively coupled in the horizontal direction above a dipole; the artificial metamaterial wide-angle broadband matching layer and the artificial magnetic surface are adopted, so that the wide-angle broadband scanning characteristic of the antenna is ensured, and the profile of the antenna is greatly reduced at the same time. The antenna is suitable for the fields of planar or cylindrical conformal wide-angle and broadband scanning phased-array antennas in high-speed communication systems.

The invention relates to a design method and device of an ultra-wideband antenna, computer equipment and a storage medium. The method comprises the following steps: based on an input antenna model, obtaining an endpoint preset value of the antenna model; loading the antenna model according to a preset rule to obtain an optimal feed point value of the antenna model; based on the antenna model, segmenting the antenna model into a plurality of simulation material blocks; obtaining an optimal gradient curve of the antenna model according to the distance value between each simulation material block and the optimal feed point value, an end point preset value and a preset optimization function; and transmitting the optimal gradient curve to an ink-jet printing controller to instruct the ink-jet printing controller to perform jet printing on the antenna substrate based on the optimal gradient curve to obtain the ultra-wideband antenna. The ultra-wideband antenna obtained by the method has the advantages of wider bandwidth broadening, faster time domain convergence and less high-frequency clutter noise.

The invention discloses a zero-reflection network based on complex impedance matching, the input of the zero-reflection network is complex impedance, the output of the zero-reflection network is standard 50 ohm port impedance, and the zero-reflection network comprises N stages of matching circuits which are sequentially connected in series, and a resistive element which is connected with the N stages of matching circuits in parallel; the matching circuit is used for converting input complex impedance into a parallel impedance value of port impedance and a resistive element in a passband, and converting the input complex impedance to tend to infinity in a stop band; and the resistive element is used for further converting infinite impedance generated out of band into a matching state and dissipating the absorbed reflected signal, so that the output port has no reflected signal in a full frequency band; wherein N represents the number of the matching circuits and is a positive integer greater than or equal to 1. According to the invention, a capacitor device of the last stage in the in-band matching network is multiplexed as an impedance converter, a zero reflection network of complex impedance input is realized for the first time, impedance matching conditions are met in a full frequency band, and reflection signals of an output port are eliminated.

The embodiment of the invention provides a radio frequency circuit adjusting method and device, electronic equipment and a storage medium, relates to the technical field of electronic equipment. A first voltage standing-wave ratio of a radio frequency circuit under a first working parameter is acquired, and the first voltage standing-wave ratio is compared with a first voltage standing-wave ratiorange corresponding to the first working parameter. When the first voltage standing-wave ratio is not within a first voltage standing-wave ratio range corresponding to the first working parameter, a device of the radio frequency circuit may be in a mismatch state, the working parameter of the radio frequency circuit is adjusted from the first working parameter to a second working parameter, and asecond voltage standing-wave ratio of the radio frequency circuit under the second working parameter is acquired; and the second voltage standing-wave ratio is compared with a second voltage standing-wave ratio range corresponding to the second working parameter; if the second voltage standing-wave ratio is within the second voltage standing-wave ratio range, the radio frequency circuit can work normally, the radio frequency circuit is controlled to work according to the second working parameter, and normal work of the radio frequency circuit is guaranteed.