42 results about "Impedance Converter" patented technology

The present invention provides a method and device for increasing the beam duty cycle by using colored noise, and relates to the field of particle accelerators and signal processing technology. The method comprises: generating a digital noise signal through a finite impulse response filter; converting the digital noise signal into two branch signals of equal magnitude and opposite sign through a phase shifter; and loading the two branch signals onto a transverse electrode plate after each of the two branch signals passes through an attenuator, an amplitude modulator, an impedance converter, and an all-pass network in sequence, thereby obtaining an extracted beam subjected to transverse excitation. The present invention can effectively improve the impact of the current traditional RF-KO sweep mode on beam extraction, making the time structure of the slow extraction beam more uniform, promoting the widespread application of precise point scanning, and improving treatment efficiency.

To provide an impedance converter capable of obtaining satisfactory characteristics in a wide band.SOLUTION: With the impedance converter 1 in which the low-band impedance converting circuit 12 and the high-band impedance converting circuit 11 are connected in parallel between the input terminal IN and the output terminal OUT, and with a circuit configuration in which the phase of the pass characteristic of the high-pass filter formed by the high-band impedance converting circuit 11 is delayed with respect to the phase of the pass characteristic of the low-pass filter formed by the low-band impedance converting circuit 12, the phases of the pass characteristics can be matched when the frequency bands are combined. As a result, an impedance converter having favorable impedance conversion performance in a wide band is realized.SELECTED DRAWING: Figure 1

The embodiment of the present invention relates to the field of microwave communication technology and discloses an ultra-wideband cavity filter, comprising: a first RF coaxial connector, a second RF coaxial connector, a housing cavity, a single-ridged waveguide body disposed in the housing cavity, a first impedance converter, a second impedance converter, a first stripline, and a second stripline; multiple pairs of symmetrical grooves are disposed on both sides of the single-ridged waveguide body; one end of the single-ridged waveguide body is connected in sequence to the first impedance converter, the first stripline, and the first RF coaxial connector, and the other end is connected in sequence to the second impedance converter, the second stripline, and the second RF coaxial connector; the first RF coaxial connector and the second RF coaxial connector are respectively fixed at both ends of the outer surface of the housing cavity. Through the above method, the cavity filter realized by the embodiment of the present invention not only improves the operating frequency bandwidth and power capacity, but also makes the installation and tuning of the equipment more convenient.

The present invention relates to a low-frequency, broadband, high-power, compact impedance transformer, comprising a rectangular coaxial impedance transformer and a coaxial quick-connect connector connected to the rectangular coaxial impedance transformer. The rectangular coaxial impedance transformer comprises a base plate and a cover plate, which are fixedly connected by bolts. An inner conductor is provided at the upper end of the base plate, and an interface is provided at the lower end of the base plate, through which the coaxial quick-connect connector connects to the inner conductor. The present invention employs a rectangular coaxial coiled structure for the impedance transformation section of the inner conductor to reduce its axial length. The inner conductor is disposed on a dielectric plate C and secured via a dielectric plate D, thereby resolving the difficulty of mechanically processing the dielectric plate D. Furthermore, the overall compact design meets the client's requirements for a smaller installation space.

An exemplary embodiment of the invention relates to an electrical amplifier (10) comprising a differential preamplifier (PA) having a first output port and a second output port, and a downstream amplifier stage (DAS) having a first output unit and a second output unit; wherein the first output unit is connected to the first output port of the differential preamplifier (PA) and the second output unit is connected to the second output port of the differential preamplifier (PA); and wherein a negative impedance converter is electrically located in at least one of said differential preamplifier (PA) and said downstream amplifier stage (DAS).

The present invention relates to an ultra-fast 10ps differential Gaussian pulse generator with adjustable amplitude. The generator comprises a pulse shaping circuit, a high-voltage conversion circuit, a low-voltage conversion circuit, a high-voltage regulation circuit, an avalanche circuit, a first low-voltage regulation circuit, a first step circuit, a second low-voltage regulation circuit, a second step circuit, a differential circuit, a bandpass filter, and an impedance converter. The ultra-fast picosecond differential Gaussian pulse generator disclosed herein utilizes avalanche technology, with the adjustment circuit added to the avalanche circuit to achieve adjustable pulse amplitude.

The present invention discloses a novel balanced-unbalanced matching impedance converter device. The device comprises impedance converters with eight impedance conversion ratios, a fixing plate, and a PVC chassis. The impedance converter for each impedance conversion ratio comprises a ferrite core transformer, an input resonant capacitor, an output resonant capacitor, an unbalanced input terminal, a balanced output terminal, a PVC pipe, and a PVC pipe sleeve. The ferrite core transformer is composed of a toroidal core, a primary winding, and a secondary winding. The toroidal core is composed of multiple stacked toroidal manganese-zinc ferrite cores, and the primary and secondary windings are each wound with multiple strands of silver wire. An input resonant capacitor is connected in parallel between the primary windings, and the unbalanced input terminal is an N-type female connector. An output resonant capacitor is connected in parallel between the secondary windings, and the balanced output terminal is a 4mm banana connector. The present invention can achieve eight types of impedance conversion.

A radio frequency (RF) generating device for generating RF output signals is provided. The RF generating device includes: a controller configured to generate an RF control signal and a gain control signal; a plurality of RF signal generators, each RF signal generator being configured to generate an RF signal having at least one of a frequency and a phase determined based on the RF control signal; a plurality of RF amplification modules, each RF amplification module being configured to receive the RF signal generated by a corresponding RF signal generator and generate an RF amplification signal by controlling a gain of the RF signal based on the gain control signal; an RF switch module configured to select at least one of the RF amplification signals generated by the RF amplification modules and generate an RF output signal in a form of a multi-level pulse based on the selected at least one of the RF amplification signals; and an impedance converter connected to an electrode of an external load and configured to convert a load impedance into a target impedance having a target range, the load impedance being an impedance of the external load.

This invention relates to the field of graded impedance converter technology, and more particularly to a graded impedance converter and its processing method. The graded impedance converter includes: a graded section consisting of a beveled outer conductor and a core wire passing through the interior of the beveled outer conductor, and an assembly section disposed at one end of the graded section. The processing method includes: mixing and curing polytetrafluoroethylene (PTFE) dispersion powder with an extrusion aid to form a blank; extruding the blank through an annular gap while simultaneously coating the inner conductor to form a wet blank insulation layer; during the extrusion process, adjusting the extrusion speed according to the temperature anomaly region, adjusting the preheating temperature according to the interface distance between the rigidity anomaly region and the inner conductor, and compensating the extrusion pressure of the annular gap according to the vibration intensity and the area of ​​the rigidity anomaly region; subsequently, drying, sintering, copper tube drawing and beveling, and assembly are performed to obtain the graded impedance converter. This invention achieves continuous impedance transformation of the graded impedance converter.

The utility model relates to the technical field of network cable analyzer calibration, in particular to an impedance converter of a network cable analyzer, which comprises two RJ45 adapter interfaces, four N-type radio frequency interfaces and four impedance conversion modules, each N-type radio frequency interface is connected with the input end of one impedance conversion module, and the other N-type radio frequency interface is connected with the output end of the other impedance conversion module. The output end of each impedance conversion module is connected with the two RJ45 adapters respectively; the impedance conversion module comprises a first balun transformer, a second balun transformer and a third balun transformer, the first balun transformer is connected with the second balun transformer and the third balun transformer in sequence, the first balun transformer is used for achieving impedance conversion and conversion of unbalanced end signals and differential balance signals, and the second balun transformer is used for achieving differential balance signals. And the second balun transformer and the third balun transformer are used for dividing one path of input into three paths of output. According to the utility model, broadband measurement requirements of calibration of a network cable analyzer can be met, full-project calibration of different regulation requirements can be completed, and the problem of characteristic impedance matching of 100 omega or 150 omega of the characteristic impedance of a twisted pair is solved.

This invention relates to a high-frequency plasma light source (1), wherein, in the operating state, a quasi-capacitively coupled plasma is formed by at least two plasma anchors (6, 7), thus the plasma region with the highest energy density is spatially decoupled from the plasma anchors (6, 7). The high-frequency plasma light source (1) includes: - a pressure chamber (5) containing a gaseous medium, in the operating state, a luminescent plasma is formed within the pressure chamber; - an impedance converter (4) assembly connected to the pressure chamber (5) and including a coupling pin (8) for coupling electromagnetic waves into the high-frequency plasma light source (1) and having an internal guide... The inner conductor (9) and the outer conductor (9b) are coaxial conductors (9a) and (9b), wherein a dielectric pressure seal (13) and at least one conductive or dielectric connector (10, 12) are provided between the inner conductor (9a) and the outer conductor (9b), an inner conductor plasma anchor (6) extending into the pressure chamber (5) and electrically and mechanically connected to the inner conductor (9a) of the coaxial conductor (9), and an outer conductor plasma anchor (7) having a first end (7a) located in the pressure chamber (5) and a second end (7b) mechanically connected to the inner surface of the pressure chamber (5).

The present invention relates generally to the field of electret capsule, and more particularly to a circuit configuration of an impedance converter integrated in an electret capsule such as for use in condenser microphones. The electret capsule of a microphone may include a gate biasing field effect transistor (FET) to facilitate biasing of a low noise FET. Advantageously, the use of low noise FET in the electret capsule of a microphone provides for a reduced cost, while achieving lower self-noise.

The invention relates to the technical field of radio frequency multi-vector synthesis impedance transformers, solves the technical problem that a vector synthesis transformer needs to measure a large number of complex impedance points during multi-vector synthesis, so that the consumed time is long, and particularly relates to a radio frequency multi-vector synthesis impedance transformer and a method for measuring the complex impedance points. Comprising a multi-vector impedance converter serving as a main body, and a measuring module used for measuring a plurality of complex impedance points required by multi-vector synthesis is arranged in the multi-vector impedance converter. According to the method, measurement data of N1 * N2 *... * Nn complex impedance points can be obtained only by measuring N1 + N2 +... + Nn complex impedance points without positioning massive complex impedance points of each vector converter combination one by one, so that radio frequency multi-vector synthesis rapid measurement becomes possible, the measurement time is greatly shortened, and the measurement efficiency is improved. Therefore, the design and test efficiency of the high-power radio frequency chip, module and system is greatly improved.

An outphasing amplifier includes a first amplifier, a second amplifier, a first coupler coupling a first signal and a third signal, a second coupler coupling a second signal and a fourth signal, a first impedance converter inputting the first signal coupled with the third signal, a second impedance converter inputting the second signal coupled with the fourth signal, a combiner combining the first and the second signals output from the first and the second impedance converters and outputting an output signal, and a signal processor outputting the first signal having a first phase to the first amplifier, outputting the second signal having a second phase to the second amplifier, outputting the third signal having at least one of a third phase and a first amplitude to the first coupler, and outputting the fourth signal having at least one of a fourth phase and a second amplitude to the second coupler.

A multiplexer includes an impedance converter. The impedance converter includes: a transmission line having a length of λ / 4 (λ is an in-transmission-line wavelength of a signal) and a characteristic impedance of 35Ω; and a transmission line having a length of λ / 4 and a characteristic impedance of 70Ω. The impedance converter includes: a transmission line having a length of λ / 4 and a characteristic impedance of 35Ω; and a transmission line having a length of λ / 4 and a characteristic impedance of 70Ω.

The present application provides a power amplification module, which aims to properly combine a wideband signal while reducing the module. The power amplification module comprises: a first amplifier, which amplifies the power level of a first input signal of a given frequency band and outputs a first signal of a first power level; a first impedance converter connected with the first amplifier and comprising a transmission line transformer; a second amplifier, which amplifies the power level of a second input signal of the given frequency band and outputs a second signal of the first power level; a second impedance converter connected with the second amplifier and comprising a transmission line transformer; and a combiner, which combines the first signal input through the first impedance converter and the second signal input through the second impedance converter into an output signal of a second power level greater than the first power level, and comprises a transmission line transformer.

An inkjet printing system includes: an inkjet head including a plurality of nozzles that eject ink; a driver that controls driving of the plurality of nozzles; an impedance converter located between the driver and the inkjet head, the impedance converter having an impedance which varies based on a magnitude of an input voltage provided by the driver; and a self-sensing circuit part connected to an input terminal of the inkjet head and an output terminal of the impedance converter, the self-sensing circuit part measuring a self-sensing voltage for each nozzle.

To provide an amplifier which includes a simple circuit configuration and has highly efficient and wide band characteristics.SOLUTION: An amplifier device comprises: a first substrate with a first impedance converter which converts impedance of output signal of a first amplifier amplifying inputted first signal; a second substrate with a second impedance converter which converts impedance of output signal of a second amplifier amplifying inputted second signal; and a third impedance converter a part of which is arranged in the first substrate and the other of which is arranged in the second substrate, and which has an electrical component passing AC signal and blocking DC signal. The output signal of the first impedance converter and the output signal of the third impedance converter are combined and output.SELECTED DRAWING: Figure 12

A microphone is disclosed. The microphone comprises an electromechanical transducer (ET) configured for converting sound waves into an electric signal to be supplied at an output (4) of said transducer; an impedance converter (IC) having an input (6) for receiving an electric signal and an output (8) for providing an electric output signal; a power supply regulator (PSR) for powering said impedance converter (IC); said power supply regulator comprising power supply input (10) and a regulated output (12); a microphone output connector (MOC) comprising a ground connector pin (1), a first signal connector pin (2) and a second signal connector pin (3); and a switchable output stage (200). The switchable output stage (200) comprises: a transformer (TR) comprising a primary winding (TR1) having a first end terminal (TR1a) and a second end terminal (TR1b); and having a first secondary winding (TR2) and a second secondary winding (TR2'), electrically coupled in series at a tap point terminal (TPT); and further having a first end terminal (TR2a) and a second end terminal (TR2b); and a switch (S) comprising a first switch section (S1) and a second switch section (S2). The switch S is being configured to be switched between a first configuration and a second configuration. Hereby, the microphone may be switched between a first configuration in which the signals conveyed to the first signal connector pin (2) and / or the second signal connector pin (3) of the (MOC) is a signal which predominantly originates from the secondary windings (TR2,TR2') of the transformer (TR); and a second configuration in which the signals conveyed to the first signal connector pin (2) is a signal which predominantly has bypassed that transformer TR.

The present invention provides a substrate processing apparatus and a control method of a substrate processing apparatus, in which a timing at which high-frequency electric power for generating plasma is supplied to plasma at a high power is adjusted with respect to attracted high-frequency electric power in a plasma processing apparatus. The substrate processing apparatus includes: a substrate stage on which a substrate is placed; a first high-frequency power source that supplies a first high-frequency electric power of a first frequency to the substrate stage; an impedance converter that converts an impedance on a load side, as viewed from the first high-frequency power source, to a set impedance that is set; a second high-frequency power source that supplies a second high-frequency electric power of a second frequency that is lower than the first frequency to the substrate stage; and a control section that controls the set impedance of the impedance converter, the control section setting the set impedance in accordance with substrate processing.

The invention discloses a G-band four-ridge dual-polarized horn antenna which comprises a four-ridge horn section, a four-ridge waveguide transition section and a partition polarizer, the four-ridge horn section is used for generating two orthogonal fields, and the four-ridge waveguide transition section is used for performing impedance matching on the four-ridge horn section and the partition polarizer. The partition plate polarizer is used for performing dual polarization on G-band electromagnetic waves transmitted by a signal source and then transmitting the G-band electromagnetic waves to the horn antenna section, in the partition plate polarizer, a stepped metal partition plate is arranged in a square waveguide to divide the square waveguide into two rectangular waveguides, and an inner side impedance converter and an outer side impedance converter perform impedance matching on a feeder line and the square waveguide. According to the invention, the partition plate polarizer is adopted to realize equal-amplitude 90-degree phase difference feed and conversion between linear polarization and circular polarization at the same time under the condition of a single port.

The utility model discloses a portable three-feed-source omnidirectional antenna, which belongs to the technical field of antennas and is characterized in that a half-wave folded dipole and a waterproof insulating sheath are mounted on the outer ring of the upper end of a balancer in a surrounding manner, the middle of the outer ring of the half-wave folded dipole is sleeved with the waterproof insulating sheath, and an inner conductor is mounted on the lower portion in the half-wave folded dipole in a surrounding manner; the outer end of the inner conductor is provided with a high-temperature-resistant insulating part, the upper end of the coaxial connector is provided with a balancer for limiting the half-wave folded dipole and the waterproof insulating sheath respectively, and the high-temperature-resistant insulating part, the inner conductor, the three-centimeter device, the insulator and the impedance converter are used for carrying out omnibearing surrounding feed source, so that good directionality, higher borne power and higher output are realized. The antenna has the advantages of wide gain bandwidth, no need of additional outer cover protection, indoor and outdoor application, light weight, simple and light structure, strong weather resistance and wider application, the horizontal lobe width of the antenna is 360 degrees, and the vertical half-power lobe width of the antenna is 45-60 degrees.

The invention discloses a double-ridge waveguide cut by a low-power microwave thermal cracking method and a design method, and relates to the technical field of microwave cutting. Comprising an electric field heating cavity, two metal ridges symmetrically arranged in a heating area, two stepped impedance converters symmetrically arranged at the two ends of the electric field heating cavity and waveguide ports arranged at the tail ends of the stepped impedance converters. A containing gap used for containing a to-be-cut material exists between the two metal ridges, and an inlet and an outlet of the to-be-cut material corresponding to the containing gap are symmetrically formed in the wall of the heating cavity. According to the invention, the problem of low energy utilization rate in microwave cutting of the low-loss material is solved, so that microwave hot cracking cutting of the low-loss brittle material at a low power level is realized.

The utility model discloses a single ridge waveguide coaxial converter, which belongs to the technical field of communication, and is characterized by comprising a cover plate, an impedance converter is arranged on the rear side of the cover plate, a coaxial connector is arranged at the top of the impedance converter, and a connector body is fixedly connected to the top of the coaxial connector. A threaded rod in the connecting mechanism is in threaded connection with a ring disc, a lubricating structure is clamped to the rear side of the ring disc, and a limiting rubber ring is clamped to the front side of the ring disc, so that during mounting, the threaded rod is inserted into a mounting hole and is tightly connected with the ring disc by rotating the threaded rod, and the limiting rubber ring and the lubricating structure play roles in fixing and lubricating, so that stable connection and convenience in operation are ensured; in the long-term use process, if the threaded rod needs to be replaced, the threaded rod only needs to be spirally rotated out of the limiting rubber ring, the lubricating structure and the ring disc, disassembly and replacement can be conveniently carried out, and use of a user is better facilitated.

The invention provides a broadband filtering impedance converter with a high impedance conversion ratio and a design method thereof, and belongs to the technical field of electrical equipment, the broadband filtering impedance converter comprises a first lambda / 4 wavelength transmission line, a first lambda / 4 wavelength short-path line, a second lambda / 4 wavelength transmission line and a second lambda / 4 wavelength short-path line which are sequentially connected between an input port and an output port; the other end of the first lambda / 4 wavelength short-path line and the other end of the second lambda / 4 wavelength short-path line are both grounded. The numerical value of the characteristic impedance is determined based on the target relative bandwidth, the target return loss and the impedance conversion ratio r by making the transfer function of the converter accord with the third-order Chebyshev filtering response; three transmission poles are generated in a passband, so that flat in-band response and expanded bandwidth are realized. Besides, circuit parameters can be directly determined according to specified design requirements, including impedance conversion ratio, bandwidth and in-band return loss (RL), so that the design process is greatly simplified.

The present invention relates to a multi-frequency, high-gain terahertz microstrip antenna based on a photonic crystal substrate. The purpose of the present invention is to provide a multi-frequency, high-gain terahertz microstrip antenna based on a photonic crystal substrate. The antenna comprises a ground plate, a second dielectric substrate, a first dielectric substrate, and a radiating patch. The ground plate is adhered to the second dielectric substrate, and a photonic crystal structure is disposed in the second dielectric substrate. The first dielectric substrate is bonded to the second dielectric substrate via a prepreg. The radiating patch is etched on the first dielectric substrate and is matched and connected to a quarter-impedance converter and a 50Ω microstrip transmission line. The ends of the quarter-impedance converter are connected to the radiating patch and the 50Ω microstrip transmission line, respectively. Compared with the prior art, the antenna of the present invention meets the requirements for stable operation in three THz frequency bands and has high gain in all three operating frequency bands. It has a simple, novel structure, and is easy to implement.

A power transfer device according to one embodiment of the present invention comprises: an impedance matching network for transferring RF power of an RF generator to a load; a band elimination filter which transfers the DC pulse voltage of the DC pulse generator to a load and suppresses transfer of the RF power to the DC pulse generator; the DC blocking capacitor is connected to the output end of the impedance matching network and used for inhibiting the DC pulse voltage passing through the output end of the band elimination filter from being transmitted to the impedance matching network; and an impedance converter connected to the output end of the band elimination filter and changing the impedance of the RF power incident to the band elimination filter. The output end of the impedance converter and the output end of the DC blocking capacitor are connected with each other and then are connected to the load through a transmission line.

A wearable device includes a receiving element, a first waveguide structure, a second waveguide structure, an impedance converter, a transmitting element, and a flexible wearable layer. The first waveguide structure and the second waveguide structure are adjacent to the receiving element, wherein the receiving element is between the first waveguide structure and the second waveguide structure. The impedance converter is adjacent to the first waveguide structure. The transmitting element is adjacent to the impedance converter, wherein the impedance converter is between the first waveguide structure and the transmitting element. The flexible wearable layer can be used to carry the receiving element, the first waveguide structure, the second waveguide structure, the impedance converter, and the transmitting element, wherein the first waveguide structure, the second waveguide structure, and the transmitting element can collectively form a composite radiator.

The application provides a standard device applied to CAT 6A near-end crosstalk, which converts an RJ45 interface into eight common SMA connectors by using a special fixture, and a differential circuit is arranged in the fixture, and the conversion of impedance is realized through the operation of the differential circuit, so that the calibration of the near-end crosstalk between the wire pairs can be realized, the high-cost impedance converter in the prior art is omitted, the conventional SMA connector is used, cost can be saved, and large-scale popularization and application are facilitated.

The invention discloses a multi-step impedance converter microwave sensing system based on parallel open circuit branches. By introducing the lossy microstrip line impedance formula, the optimal size of the impedance transformer under the condition of maximizing the transmission coefficient phase change rate is obtained, then the differential model of the output direct-current voltage and the dielectric constant is constructed, the optimal solution of the sensitivity is solved under the condition of considering the loss of the liquid to be detected, and therefore the detection performance is remarkably improved. In order to reduce the detection cost, a multi-step impedance converter is used as a load network, a reflection type radio frequency oscillator is designed according to a negative impedance theory, and the change characteristic of a dielectric constant is converted into oscillation frequency change. Furthermore, a frequency demodulation circuit is carried to demodulate the change of the oscillation frequency into the change of the direct-current voltage, so that the equipment cost is reduced. The microwave micro-flow sensor provided by the invention has the advantages of high sensitivity, convenience in detection and the like, and plays an important role in industrial and agricultural production.