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

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 belongs to the technical field of antenna engineering and wireless communication, and relates to an all-dielectric integrated ultra-wideband low-profile multi-form conformal phased array antenna. The antenna is a planar array or a conformal array composed of array elements, and each array element includes a wide-angle broadband matching layer, a feeding balun layer, a radiation antenna layer, an artificial magnetic surface layer, and a dielectric layer stacked from top to bottom. Isolation layer, and floor. The invention replaces the vertical feed balun in the traditional continuous current surface antenna with a horizontal capacitively coupled feed patch above the dipole, and uses an artificial metamaterial wide-angle broadband matching layer and an artificial magnetic surface to ensure The wide-angle and wide-band scanning characteristics of the antenna greatly reduce the antenna profile, and it is suitable for the plane or cylinder conformal of wide-angle and wide-band scanning phased array antennas in high-speed communication systems.

The invention discloses a sequential solidification technology device and method used in vacuum smelting equipment. An induction heating coil is placed in a dead head section of an ingot die, and the feeding capacity of metal liquid in a dead head is enhanced through an induction heating method; a bottom cooling device with the cooling area smaller than the area of the cross section, at the bottom position of the ingot die, of a casting is arranged at the bottom of an ingot die base, the solid-liquid interface angle is reduced, and the metal liquid in the ingot die after pouring can be sequentially solidified from bottom to top. The solidification process control method is applicable to production of metal bar castings in the vacuum smelting equipment. Through the sequential solidification technology device and method, macroshrinkage and shrinkage porosity in alloy bar castings can be eliminated, the casting quality and the technology yield are improved, and the production efficiency is greatly improved.

Embodiments of the present application provide a radio frequency circuit adjustment method, device, electronic equipment, and storage medium, which relate to the technical field of electronic equipment, collect the first voltage standing wave ratio of the radio frequency circuit under the first operating parameter, and convert the first voltage The standing wave ratio is compared with the first voltage standing wave ratio range corresponding to the first working parameter. When the first voltage standing wave ratio is not within the first voltage standing wave ratio range corresponding to the first working parameter, the device of the radio frequency circuit may be in the Mismatch state, adjust the working parameter of the radio frequency circuit from the first working parameter to the second working parameter, collect the second voltage standing wave ratio of the radio frequency circuit under the second working parameter, and compare the second voltage standing wave ratio with the second The second VSWR range corresponding to the working parameters is compared, if the second VSWR is within the second VSWR range, the radio frequency circuit can work normally, and the radio frequency circuit is controlled to work with the second working parameter to ensure that the radio frequency The circuit works normally.

The invention discloses a four-conducting-probe measurement signal-processing system for gas-liquid two-phase flow detection; voltage signals detected by probes are subjected to filtering, denoising, shaping and other processing, so that a signal acquired by a subsequent acquisition card can more really and conveniently show bubble information in a gas-liquid two-phase flow. For ensuring that the signals of the four probes are not affected with each other, at the same time, for ensuring that the amplitude of an output signal of a processing circuit conforms to the acquisition range of the acquisition card, and in the circuit design of the processing system, an isolated operation amplifier is used for each channel of signal and is used for isolating and amplifying the signal. In addition, because the precision of latter signal processing is directly affected by the amplitude and width of the probe signals, for ensuring the parameter-obtaining precision of the probe measurement system, the signal processing system adopts vast denoising measures in the aspects of signal conditioning and transmission, for example, connectors, shielding circuits, filter circuits and the like with good anti-interference performance are used.

The method comprises: a) hollowing out all signaling layers and plane-layers corresponding to the vertical direction of the controlled transmission line; b) the hollowed widths of all signaling layers and plane-layers can be set into a variable; with adjusting and setting the hollowed width, controlling the impedance of transmission line at any required values.

In a connector with a structure that is more miniaturized and has a narrower terminal spacing (narrow pitch structure), in the case of transmitting higher-frequency electrical signals, etc., the spacing between the terminals is not constant, and it cannot be sufficiently connected. Prevent the interference of impedance matching caused by electrical negative effects such as crosstalk. The present invention provides a connector in which a plurality of terminals of the same shape are arranged at equal intervals along the longitudinal direction. The narrow-pitch structure can also keep the lateral width of the contact portion of each terminal and the interval between the contact portions of each terminal constant, and can expand the interval between the contact portions of each terminal, which can prevent terminals from being caused by mutual capacitance or induction. In the event of possible electrical negative effects such as crosstalk, the impedance matching can be properly maintained.

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 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.