830 results about "Power combiner" patented technology

A power amplifier assembly has a first power amplifier with a first input conditioning circuit. At least first and second amplifiers are in parallel with each other and having inputs and outputs. An input signal is coupled to the inputs of the first and second amplifiers. A first multi-input power combiner is provided. The outputs of the at least first and second parallel amplifiers are combined by the first multi-input power combiner to add signals of the outputs constructively. A second power amplifier has a first input conditioning circuit. At least first and second amplifiers are in parallel with each other and having inputs and outputs. An input signal is coupled to the inputs of the first and second amplifiers. A second multi-input power combiner is provided. The outputs of the at least first and second parallel amplifiers are combined by the second multi-input power combiner to add signals of the outputs constructively.

In an exemplary embodiment, a phased array antenna comprises a bidirectional antenna polarizer and is configured for bidirectional operation. The bidirectional antenna polarizer may combine active implementations of power splitters, power combiners, and phase shifters. Furthermore, in another exemplary embodiment a bidirectional antenna polarizer has extensive system flexibility and field reconfigurability. In yet another exemplary embodiment, the bidirectional phased array antenna operates in “radar-like” applications where the transmit and receive functions operate in half-duplex fashion. Furthermore, in exemplary embodiments, the phased array antenna is configured to operate over multiple frequency bands and / or multiple polarizations.

A power supply system comprises a low-speed power supply and a high-speed power supply configured to operate in first and second frequency ranges, respectively, and generate first and second outputs, respectively. The lower end of the second frequency range is at least higher than a lower end of the first frequency range. A frequency blocking power combiner circuit combines the power from the first output with the power from the second output to generate a combined, third output for driving a load, while providing frequency-selective isolation between the first and second outputs. A feedback circuit is coupled to receive the combined, third output through a global feedback loop. The feedback circuit generates first and second power supply control signals for controlling the low-speed power supply and the high-speed power supply, respectively, based on a difference between the third output and the predetermined control signal.

Radio frequency (RF) power amplifiers are provided which may include high power, wideband, microwave or millimeter-wave solid state power amplifiers based on waveguide power combiner / dividers.

The invention relates to a wireless-receiving system for detecting microelectronic mechanical microwave frequency and a preparation method thereof. The wireless-receiving system for detecting the microelectronic mechanical microwave frequency has quite simple structure, large measurement magnitude range, no direct-current power consumption and easy integration. In the system for detecting the microelectronic mechanical microwave frequency, gallium arsenide is used as a substrate, wherein a microwave antenna (A), a one-three power splitter (B), a coplanar waveguide transmission line (C), a two-in-one power combiner (D), an MEMS cantilever capacitive microwave power sensor (E) and an MEMS thermoelectric microwave power sensor (F) are designed on the substrate; and then a phase difference between a signal 3 and a signal 2 after the signal 3 passes through the coplanar waveguide transmission line with the length of lambda / 2 can be determined according to a law of cosines. Because the phase difference corresponds to the frequency of the signal, the frequency of the signal can be measured.

A head-up display system includes a display device for generating and displaying information to an eye of an observer; a tilted power combiner for superimposing the information displayed by the display device onto the forward view of the outside by the eye of the observer; and a relay optic assembly between the display device and the tilted power combiner for forming an intermediate image of the displayed information forwardly of the combiner that reflects the image towards the eye of the observer within an eye motion box to produce a large field of view for the observer. The relay optic assembly is void of holographic elements and includes a spherical mirror generating aberrations in the intermediate image tending to compensate for aberrations produced by the tilted power combiner.

this invention relates to power in direct-current circuits. The invention takes gallium arsenide as foundation (1). On the foundation has power divider, power synthesizer, 90deg phaser, solid beam structure. Power divider and power synthesizer composed by port one (7), port two(8), port three(8), dissymmetry coplane band line(10), nitride tantalum electric resistance. Solid beam structure includes signal input port(16), pier(5), solid beam(13), pedestal structure(6), sensing electrode(4), sensing electrode leader(12), capacitance detecting port(15), air bridge(14). There are nitriding silicon medium layer on the transmission line, pedestal structure and sensing electrode under solid beam, and sensing electrode leader under Air Bridge.

A direct current (DC) power combiner operable to interconnect multiple interconnected photovoltaic strings is disclosed. The DC power combiner may include a device adapted for disconnecting at least one photovoltaic string from the multiple interconnected photovoltaic strings, each photovoltaic string connectible by a first and second DC power line. The device may include a differential current sensor adapted to measure differential current by comparing respective currents in the first and second DC power lines. A first switch is connected in series with the first DC power line. A control module is operatively attached to the differential current sensor and the first switch. The control module may be operable to open the first switch when the differential current sensor measures the differential current to be greater than a maximum allowed current differential, thereby disconnecting the photovoltaic string from the interconnected photovoltaic strings.

A multilevel LINC transmitter. The multilevel LINC transmitter comprises a multilevel signal component separator, a phase modulator block, and an RF block. The multilevel signal component separator comprises a multilevel scaler and converts a base band signal to constant envelope signals. The phase modulator block is coupled to the multilevel signal component separator. The RF block comprises a plurality of power amplifiers coupled to the phase modulator block and the multilevel scaler and a power combiner coupled to the power amplifiers.

The invention discloses an online microwave frequency detector and a detecting method thereof based on a cantilever beam and a direct-type power sensor. The detector is prepared on a GaAs substrate and comprises coplanar waveguide (CPW) transmission lines, four micro-electromechanical system (MEMS) cantilever beam structures of the completely same structure, a power combiner and three MEMS direct-type microwave power sensors of the completely same structure. The micro-electronic mechanical online microwave frequency detector provided by the invention not only has the advantages of being novel in structure and smaller in size, but also can realize online detection on a microwave signal frequency, and can be compatible with a GaAs single wafer microwave integrated circuit.

A polarization independent (PI) interferometer design that can be built from standard optical components is described. Based upon a Michelson interferometer, the PI interferometer uses a 50 / 50 splitter and Faraday Rotator Mirrors (FM's). The interferometer achieves good optical characteristics, such as high extinction ratio (ER) and low insertion loss (IL). Lack of polarization sensitivity reduces interferometer construction tolerances and cost, enhances performance and utility, and expands the scope of interferometric based devices. Such characteristics can be used to construct flexible, high performance, polarization insensitive, multi-rate, self-calibrating, optical DPSK receivers, power combiners, optical filters and interleavers, all-optical switches, and cascaded interferometers. Since polarization is not maintained in standard fiber optic networks, a PI-DPSK receiver allows for use of more sensitive DPSK communications over fiber, without need for costly polarization control hardware. Other applications of PI interferometers include optical CDMA, secure communications, optical coherence tomography (OCT), and temporal gratings with ultra-precise timing.

A multimode to low-mode optical fiber is constructed by forming a plurality of multimode optical fibers into a fiber bundle. The bundle is then selectively heated and drawn to form a bi-tapered fiber bundle having a central straight portion in which the multimode fibers are fused into a single length of fiber. During the drawing step, measures are taken to provide an aperture extending through the bi-tapered bundle, including the single straight portion of the bundle. An optical fiber having a low-mode or single-mode core is inserted through the aperture into the straight section of the bi-tapered bundle. The bi-tapered bundle and the low-mode core fiber are heated to a temperature at which cladding of the low-mode core fiber fuses to the straight portion of the bi-tapered bundle. The bi-tapered bundle is then cleaved in the straight portion to provide the multimode to low-mode optical fiber combiner. In one example, the multimode fiber bundle is formed around a metal wire before the drawing operation. After the drawing operation the wire is extracted from the bi-tapered bundle leaving the aperture in the bi-tapered bundle.

The invention discloses a device and a method for phase detection based on a direct type micromechanical microwave power sensor. The device comprises an adjustable digital phase shifter (12), a power combiner (16), the direct type micromechanical microwave power sensor (19) and a digital multimeter (20), a reference microwave signal Vref is connected with a first input port (14) of the power combiner, a to-be-detected signal Vx is connected with an input port (11) of the adjustable digital phase shifter, an output port (13) of the adjustable digital phase shifter is connected with a second input port (15) of the power combiner, an output port (17) of the power combiner is connected with an input port (18) of the direct type micromechanical microwave power sensor, and back holes (8) on the direct type micromechanical microwave power sensor (19) are connected with the digital multimeter (20). The objective of accurate detection of microwave signal phase position is realized by utilizing the method of power after combining a measuring reference signal with the to-be-detected signal after phase shifting by the adjustable digital phase shifter.

A feedforward amplifier includes a power divider for dividing the input signal into first and second signals. The first signal is processed in a first path that includes, in sequence, a first vector adjuster, a main amplifier, a directional coupler and a delay circuit. The second signal is delayed in a second path that includes, in sequence, another delay circuit, a first power combiner and an auxiliary amplifier block. The first power combiner combines the first signal, by way of a coupling port from the directional coupler, with the second signal to provide a combined signal into the auxiliary amplifier block. The auxiliary amplifier block further divides the second signal into two divided signals, each having a respective non-overlapping frequency band. The two divided signals are respectively vector adjusted, amplified, and then recombined. The recombined signal is then recombined with the processed signal in the first path to provide the desired output signal.

A radio frequency (RF) amplifier structure provides highly efficient RF signal amplification across a wide bandwidth, when implemented in both inverting and non-inverting Doherty designs, by employing matching impedance transform circuits that comprise a low pass multiple section inductance-capacitance circuit and that provides impedance matching between the output of an amplifier device and a power combiner, wherein the output matching impedance transform circuit has approximately an odd multiple of 90 electrical degrees over the RF amplifier structure's frequency range of operation, and adjustable phase delay circuits that route an amplified RF signal to the power combiner and that are controllably adjusted based on a frequency of an RF input signal over an operating frequency range of the RF amplifier structure.

The invention includes a method and apparatus, each with several embodiments, for combining power from two ports of a multi-port Power Sourcing Equipment (PSE) for Power over Ethernet (PoE) systems, for the purpose of providing increased power to a Powered Device (PD) that comprises two separate loads and requires two sources of power.

A radial power combiner / divider capable of a higher order (for example, N=24) of power combining / dividing and a 15% bandwidth (31 to 36 GHz). The radial power combiner / divider generally comprises an axially-oriented mode transducer coupled to a radial base. The mode transducer transduces circular TE01 waveguide into rectangular TE10 waveguide, and the unique radial base combines / divides a plurality of peripheral rectangular waveguide ports into a single circular TE01 waveguide end of the transducer. The radial base incorporates full-height waveguides that are stepped down to reduced-height waveguides to form a stepped-impedance configuration, thereby reducing the height of the waveguides inside the base and increasing the order N of combining / dividing. The reduced-height waveguides in the base converge radially to a matching post at the bottom center of the radial base which matches the reduced height rectangular waveguides into the circular waveguide that feeds the mode transducer.

A power combiner circuit for RF signals includes a multi-path network for conveying a plurality of RF signals over a selected path or paths, to a common node. A switched RF impedance transformer connects between the common node and an RF load. The switched RF transformer switches between first and second transformation functions depending upon the number of network paths that are selected.

A 90-degree phase delay power divider part PSPD is connected to an input side of a carrier amplifier Amp1 and a peak amplifier Amp2, and a variable electric length power combiner VTL2 is connected to an output side thereof. A control signal Sig is applied through a control terminal Ctrl of the variable electric length power combiner VTL2, and adjustment is performed in correspondence to a carrier frequency band of a carrier signal RFs so that an electric length of the variable electric length power combiner VTL2 becomes nearly 90 degrees. As a result, an electric length of an output power combining circuit of a Doherty type amplifier can be made variable, and a power-added efficiency can be enhanced for a multi-band or broad band.

An A / C-D / C-F / C power system is provided that includes a portable power unit that can accept electricity from a number of alternative sources including an AC power source, a DC power source, a battery, and a direct oxidation fuel cell. In accordance with one embodiment of the invention, the fuel cell is used to either recharge a battery, or to power an application device, when the AC source and / or the DC source are unavailable. The A / C-D / C-F / C system of the present invention also includes signal processing and signal conditioning circuitry in a power combiner and conditioner, which condition the voltage signal to deliver power to the application device in a manner that is consistent with device requirements.

Systems and methods may include a signal component separator that receives a non-constant envelope input signal and at least one phase offset value, and generates first digital phase data and second digital phase data; at least one digital phase modulator that receives the first phase data and the second phase data and operates with a frequency synthesizer to generate a first component signal having a first constant envelope and a second component signal having a second constant envelope; at least one power amplifier that amplifies the first component signal and the second component signal; a non-isolated power combiner that combines the first amplified component signal and the second amplified component signal to generate an output signal having a non-constant envelope; and a mismatch compensator that monitors the output signal to determine the at least one phase offset value, where the at least one phase offset value is utilized by the signal component separator for phase adjustment.

In a transmission power amplifier apparatus, a signal calculator divides an input signal into a plurality of N constant amplitude signals having a substantially identical predetermined constant amplitude value and having predetermined phases different from each other, and N power amplifiers amplify electric powers of the N constant amplitude signals under same predetermined operating condition. A power combiner combines the electric powers of the N power-amplified constant amplitude signals, and outputs a combined output signal. A controller controls the signal calculator to detect an amplitude value of the input signal, to detect an average value and one of a maximum value of the amplitude value of the input signal and a peak-to-peak value of the amplitude value for a unit time interval based on the detected amplitude value of the input signal, and to divide the input signal into the N constant amplitude signals having a constant amplitude value and different phases.

A RF power amplifying device is constituted by a system of a balanced amplifier including first phase shifters, a first RF power amplifier, a second RF power amplifier, second phase shifters, and a power combiner. Transmitting power Pout is detected by a first power level detector connected to an output of the first RF power amplifier, a second power level detector connected to an output of the second RF power amplifier, and an adder. A level control signal from a level control circuit controls transmitting power in response to a transmitting signal with wanted power level and a detected signal of the adder.

A broadband coupled-line N-way power combiner is presented for combining N RF signals into a common load. This combiner includes N>=2 input ports, a common output port, and N identical at least two-conductor coupled transmission lines, and N isolating resistors. Each of these two-conductor coupled transmission line has at one end one conductor connected to one of the input port of the power combiner, and another conductor connected to the common output port. At another end two conductors of each two-conductor coupled transmission line are terminated to one of the N isolating one-ports.

This invention relates to a method for Maximum Power Point Tracking (MPPT) a photovoltaic cell by a power converter that provides an output current at voltages useful to operate electronics or charge batteries. This invention also relates to a method for Maximum Power Point Tracking (MPPT) multiple photovoltaic cells by a power combiner that combines the output of the multiple photovoltaic cells into a single output. The power combiner is comprised of multiple power converters, one for each photovoltaic cell. Each power converter used in these methods has an input-regulating element that has an output wave form with a characteristic that is related to the photovoltaic cell voltage and current. As a result only the photovoltaic cell voltage is directly measured in these methods and the photovoltaic cell current is determined indirectly.

The invention relates to a micro electric mechanical microwave frequency checker, and a relative production, with simple structure, small amplitude of measuring signal, non direct-current power consumption, and easy integration. The checker uses gallium arsenide as a liner (1) arranged with a power distributor (a), a power synthesizer (b), a coplane waveguide line (e), and a fixing beam structure (c), wherein the object signal via the power distributor (a) generates two signals, to form an object signal and another object signal (Us1-Us2), the object signal Us1 is connected with the third port of the power synthesizer (b), the object signal Us2 via a section of a CPW line is connected to the second port of the synthesizer (b) in which port to obtain a first signal via the fixing beam structure (c) to obtain the phase shift phi of the microwave signal on the line with fixed length.

The invention relates to a microelectronic mechanical microwave frequency detector and a preparation method thereof. The microelectronic mechanical microwave frequency detector has simple structure, can measure unknown microwave signals, has large amplitude range of the measurement signals, can avoid consuming direct current power, and is easy to be integrated. The microelectronic mechanical microwave frequency detector adopts a gallium arsenide substrate provided with a 1-to-3 power distributor (a), a coplanar wave guide transmission line (b), a 2-to-1 power distributor (c), a fixing beam structure (d) and a thermocouple structure (e), thereby forming the microelectronic mechanical microwave frequency detector.