22 results about "Impedance Converter" patented technology

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

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).

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).

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.

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 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.

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 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.

A hybrid planar combiner for use in broadband high power multi-component power amplifier architectures in planar solid-state power amplifiers, which does not comprise impedance converters in the power amplifier layer, is suitable for hermetic construction, supports effective cooling infrastructure and enables easy in-circuit applications.

Testing equipment (1) for testing at least one test object (2) - with an input (3) for applying a test signal, - with an output (4) for tapping a response signal, - with a transformer (5) having a primary (6) and a secondary winding (7), - with at least one first connection contact (8) and with at least one second connection contact (9) for electrically connecting the test device (1) to the at least one test object (2), wherein - the input (3) is connected to a first winding terminal of the primary winding (6), - the output (4) is connected to a second winding terminal of the primary winding (6), - the first terminal contact (8) is electrically connected to a first winding terminal of the secondary winding (7) and - the second terminal contact (9) is electrically connected to a second winding terminal of the secondary winding (7), characterized by the fact that a first switch (10) is connected between the first winding terminal of the secondary winding (7) and the first terminal contact (8) and / or a second switch (11) is connected between the second winding terminal of the secondary winding (7) and the second terminal contact (9), and the test device (1) has a self-diagnostic circuit, wherein the self-diagnostic circuit has a signal input (16), a voltage divider (17) and at least one result transfer point (18), wherein the self-diagnostic circuit has a third switch (19) and / or a fourth switch (20) and at least one signal adaptation, for example an impedance converter (21, 22), and wherein the voltage divider (17) is constructed from resistors (23, 24, 25), preferably three resistors, where - the first resistor (23) is connected between the first and the second switch (10, 11), - the second resistor (24) is connected with a first terminal contact to a first terminal contact of the first resistor (23), - the third resistor (25) is connected with a first terminal contact to a second terminal contact of the first resistor (23).

Embodiments of a Doherty amplifier include a module substrate, a first surface mount device and a second surface mount device coupled to a top surface of the module substrate, and an impedance translator line assembly. The first and second surface mount devices include first and second amplifier die, respectively. The impedance translator line assembly is electrically connected between outputs of the first and second amplifier die. The impedance translator line assembly includes an impedance translator line coupled to the module substrate, a first lead of the first surface mount device coupled between the first amplifier die output and a proximal end of the impedance translator line, and a second lead of the second surface mount device coupled between the second amplifier die output and a distal end of the impedance translator line. According to further embodiments, the impedance translator line assembly has an electrical length of 90 degrees at a fundamental operating frequency of the Doherty amplifier.

A wearable device includes a receiver element, a first wave transmission structure, a second wave transmission structure, an impedance converter, a transmitter element, and a flexible wearable layer. The first wave transmission structure and the second wave transmission structure are adjacent to the receiver element. The receiver element is positioned between the first wave transmission structure and the second wave transmission structure. The impedance converter is adjacent to the first wave transmission structure. The transmitter element is adjacent to the impedance converter. The impedance converter is positioned between the first wave transmission structure and the transmitter element. The flexible wearable layer is configured to carry the receiver element, the first wave transmission structure, the second wave transmission structure, the impedance converter, and the transmitter element. A composite radiator is formed by the first wave transmission structure, the second wave transmission structure, and the transmitter element.

A portable bioelectric impedance monitor and methods using the monitor can measure and monitor extracellular fluid levels and / or cardiac signals. The monitor may include a tetrapolar electrode array lead with four electrodes arranged sequentially and axially along the lead, and circuitry coupled with the at least four electrodes configured to measure bioelectric impedance extracellular fluid and / or cardiac signals in a human subject at various frequencies. The electrodes are adhered to a human subject / patient on the patient's torso or one of the patient's limbs. One embodiment includes a Tetrapolar Analog Front End Patient Interface circuit configured to convert two electrode operation of a commercial Impedance Converter, Network Analyzer into a tetrapolar operation for excitation and impedance measurement of the human subject.

The invention relates to an ink jet printing system, a method for monitoring a nozzle state thereof, and an electronic device. The ink jet printing system includes: an ink jet head including a plurality of nozzles that eject ink; a driver that controls driving of the plurality of nozzles; an impedance converter between the driver and the inkjet head, the impedance converter having an impedance that varies based on a magnitude of the input voltage provided by the driver; and a self-sensing circuit portion connected to an input terminal of the inkjet head and an output terminal of the impedance converter, the self-sensing circuit portion measuring a self-sensing voltage of each nozzle.