50results about How to "Reduce reflected power" patented technology

The present invention relates to comprehensive systems, devices and methods for delivering energy to tissue for a wide variety of applications, including medical procedures (e.g., tissue ablation, resection, cautery, vascular thrombosis, treatment of cardiac arrhythmias and dysrhythmias, electrosurgery, tissue harvest, etc.). In certain embodiments, systems, devices, and methods are provided for treating a tissue region (e.g., a tumor) through application of energy.

A method is provided in plasma processing of a workpiece for stabilizing the plasma against engineered transients in applied RF power, by modulating an unmatched low power RF generator in synchronism with the transient.

The invention discloses a tunable rounding cavity type high-power microwave plasma chemical vapor deposition device which is composed of a microwave resonance cavity main body, a mode converter and amicrowave electric field adjusting system. According to the chemical vapor deposition device, by means of the rounding cavity type cavity, a sample table, the mode converter and an adjusting structurethereof, the problems of low microwave input power, the poor focusing ability, shortage of perfect adjusting measures and the too close distance between a unifying part and plasma existing in variousexisting devices can be effectively solved, gas is input from the top and output from the bottom, the multi-hole array distributing structure of a flow uniformizing ring and a buffering bin is adopted, uniformity of gas flow and distribution in a resonance cavity and on the surface of a base piece can be effectively is improved, and deposition efficiency and uniformity of a deposition diamond film are further improved. The device can achieve efficient deposition of large-area and high-quality diamond film under high power.

The invention relates to an impedance matching method and an impedance matching the same, wherein the method comprises the following steps of: separating the harmonic frequency signals from the fundamental frequency signals in the radio frequency input signals, performing frequency division processing on the harmonic frequency signals by using frequency division unit and transforming the harmonic frequency signals into sub fundamental frequency signals which have the same frequency as the fundamental frequency, and impedance matching the fundamental frequency signals and the sub fundamental frequency signals into a matching state. Therefore, the implementing of the invention can reduce the reflection power to the lowest and thus guarantees the yield rate of the semi-conduct production crafts.

The invention discloses a microwave oven and an exciter for the microwave oven, wherein the exciter comprises a waveguide box, a coaxial connector and at least one antenna rod, wherein a cavity is in the waveguide box; one end of the cavity is opened and the other end of the cavity is closed along the length direction of the waveguide box; the coaxial connector is positioned in the cavity; the upper end of the coaxial connector passes through the top wall of the waveguide box; the antenna rod is arranged in the cavity and communicated with the coaxial connector; and the antenna rod extends in a plane vertical to the axis of the coaxial connector. According to the exciter for the microwave oven, the antenna rod and the coaxial connector are communicated, so that microwaves are converted from coaxial propagation to waveguide propagation in the conductivity process, and therefore, the reflection power is reduced; the microwave radiation range is enlarged; and the microwave transmission efficiency is improved.

A power feeding system is provided, in which a detected value of reflected power at a power supply device in a power feeding installation is sent from the power feeding installation to a vehicle via a first communication device, the vehicle has an impedance matching device for adjusting an impedance at a resonance system that is constituted of a power transmission resonator, including a primary self-resonant coil and a primary coil in the power feeding installation, and a power receiving resonator, including a secondary self-resonant coil and a secondary coil in the vehicle, and the impedance matching device is controlled based on the detected value of the reflected power at the power supply device, which has been received from the power feeding installation.

The present specification relates to a wireless power transmission device. The present specification provides a wireless power transmission device comprising: a power supply unit for supplying power to the wireless power transmission device; at least one first coil for transmitting power to a wireless power reception device; and first and second condensers configured so as to be connected respectively to different both ends of the power supply unit and the first coil.

The invention discloses a detection device and a detection method for dynamics process of structure change of a micro region of a material. The device comprises two paths of laser light, one path of laser light reacts with the material, which results in that the structure of the micro region of the material changes, and the second path of laser light detects the dynamics process of the structure change. In the device and the method, a sample is automatically adjusted to a focal point of the first path of laser light by a CCD (charge coupled device) imaging method and a piezoelectric ceramic, and an objective lens with high numerical aperture is used so as to obtain the structure change of the micro region; the two paths of laser light are coaxial and vertically incident on the surface of the sample, light spots formed on the surface of the sample by the two paths of laser light are simultaneously observed through a CCD, and consequently, and the light spots of the two paths of laser light can be accurately superposed, which facilitates the detection on the dynamics process of the structure change of smaller regions; the utilization rate of the laser light is improved through a polarization beam splitting prism and a quarter wavelength plate, the two coaxial paths of laser light are completely separated by a dispersing prism and a total reflection principle, influence of non-detection light is removed, and detection precision is improved.

The invention relates to the technical field of communication equipment application, in particular to a method and a system for measuring actual output impedance of a transmitter, suitable for a system for realizing impedance matching between the transmitter and an antenna by an antenna tuner. The method comprises the steps that the antenna tuner generates a first micropower signal, performs first micropower tuning on the transmitter and the antenna, so that the transmitter and the antenna achieve impedance matching, and first load impedance of the antenna is recorded after the impedance matching between the transmitter and the antenna; parameters of the antenna tuner are kept unchanged, the transmitter transmits a high-power radio-frequency signal with a specific frequency, and a first voltage standing wave ratio is recorded, wherein the first load impedance and the first voltage standing wave ratio are taken as a first group of reference data; the process is repeated to acquire a second group of reference data; according to the first group of reference data and the second group of reference data, the actual output impedance of the transmitter is obtained.

Embodiments of the invention disclose a control circuit for a magnetic resonance radio frequency transmitting link and a magnetic resonance radio frequency transmitting system. The control circuit comprises the following parts: a bridge, containing a first radio frequency signal output port and a second radio frequency signal output port, which are respectively connected to a transmitting coil; afirst PIN diode, of which the positive pole is connected to the first radio frequency signal output port, and the negative pole is grounded; a second PIN diode, of which the positive pole is connectedto the second radio frequency signal output port, and the negative pole is grounded, wherein the control end of the first PIN diode and the control end of the second PIN diode are connected to the same control signal source. The embodiments of the invention can reduce hardware cost, reduce structural complexity, and reduce the reflected power of the radio frequency power source.

The invention discloses a method for reducing reflection power in plasma etching. The method comprises the following steps of: performing a stabilization process, performing a transformation process, an insulating antireflection layer etching process, an adhesive layer removing process, a main etching process, a bottom adhesive layer removing process, an over-etching process and a charge releasing process on a wafer to be etched in turn; and etching a metal layer of the wafer. By the method, the reflection power can be effectively reduced, and the yield of a product is improved.

The present invention relates to the field of radio frequency detection fixtures, and discloses a radio frequency detection connector and a radio frequency detection fixture. The radio frequency detecting connector comprises a conductive colloid, a switching circuit board and a coaxial high frequency connector, the conductive colloid comprises an insulating colloid and a metal wire set, the metalwire set comprises a plurality of metal wires, and the plurality of metal wires are spaced apart and placed in the insulating colloid, and two ends of each metal wire are respectively exposed outsidethe insulating colloid, and one end of the metal wire is connected to an radio frequency signal input end, and the other end of the metal wire is used to connect with a radio frequency product to be tested; and one end of the coaxial high frequency connector is connected to the switching circuit board, and the other end of the coaxial high frequency connector is used for connection with a radio frequency detector. The radio frequency detection connector is more advanced and precise, has a simpler structure, a shorter transmission line, lower loss of high frequency radio frequency, and can facilitate the radio frequency detector to improve detection accuracy of the radio frequency generated by the radio frequency product to be tested.

The electric lamp has a light source (20) in an envelope (21). The light source (20) is secured in a body (1) by means of an insulator body (40) in which current connectors (43) are integrated and which is present in a socket (10) of the reflector lamp. The socket (10) is mechanically connected to the neck portion (5) of the body (1). The integrated insulator/current connector body (40, 43) enables electrical contacting, fixation, and mechanical adjustment of the light source (20) in the body (1). For reliable electrical contacting, the current connector (43) comprises a cylindrical part (60) with scraping edges (63).