59 results about "Rat-race coupler" patented technology

High-frequency couplers and coupling techniques are described utilizing artificial composite right / left-handed transmission line (CRLH-TL). Three specific forms of couplers are described; (1) a coupled-line backward coupler is described with arbitrary tight / loose coupling and broad bandwidth; (2) a compact enhanced-bandwidth hybrid ring coupler is described with increased bandwidth and decreased size; and (3) a dual-band branch-line coupler that is not limited to a harmonic relation between the bands. These variations are preferably implemented in a microstrip fabrication process and may use lumped-element components. The couplers and coupling techniques are directed at increasing the utility while decreasing the size of high-frequency couplers, and are suitable for use with separate coupler or couplers integrated within integrated devices.

A magnetic cable fastener includes a magnetic fastener, a boss, a base, and a loop coupler attached to the base. The loop coupler is attached to the base and is operable to attach to another structure. The loop coupler may be a cable, wires, electrical conduit, rope, adjustable strap, and a tie wrap or suitable object. According to one embodiment, the loop coupler may further include at least two fingers. The fingers are operative to flex or compress appropriately to permit the cables to enter the fingers. According to another embodiment, the loop coupler is a solid loop to permit for example, a cable strap to be inserted and attach the cable strap to the loop coupler. Thus, the magnetic cable fastener may secure one or more cables via the loop fingers or solid loop or other suitable cable coupler.

The invention discloses a fractal and composite right / left-handed transmission line-based miniature double-frequency microstrip rat-race coupler, which consists of four composite right / left-handed transmission line (CRLH TL) braches and four input / output ports, wherein the four CRLH TL branches are sequentially connected end to end, and have a Koch fractal structure respectively; the four input / output ports are connected between every two adjacent branches respectively, and are used for connecting small A type (SMA) joints; the four branches comprise three CRLH TL branches with completely identical circuit parameters and the CRLH TL branch with different circuit parameters, namely, the four branches comprise three transmission line branches which realize +90 degrees and -90 degrees on the frequency bands of fL and fH respectively and the transmission line branch which realizes -90 degrees and -270 degrees on the frequency bands of fL and fH respectively; and each of the four branches is formed by concatenating two CRLH TL units. The fractal and composite right / left-handed transmission line-based miniature double-frequency microstrip rat-race coupler is rationally designed, convenient to realize, good in using effects, highly accuracy and widely applicable, and can effectively solve the problems of complex method, poor using effects, large volume, incapability of really working in a double-frequency mode and the like of the conventional double-frequency rat-race coupler.

A compact multi-band hybrid ring (rat-race) coupler utilizing a ring of composite right-handed and left-handed (CRLH) transmission lines (TLs) and multiple ports, provides miniaturization and the ability to operate at arbitrary frequency bands unlike conventional couplers. The hybrid ring is made compact, such as by constraining phase delay contributions |φ1|, |φ2|≦270°. The coupler can be used in many applications, for example as a mode decoupling network in a dual-band front-end MIMO system. The inclusion of a CRLH delay line is also described which alters the phase relationship of the signals and is particularly well suited for extending pattern diversity in response to frequency.

High-frequency couplers and coupling techniques are described utilizing artificial composite right / left-handed transmission line (CRLH-TL). Three specific forms of couplers are described; (1) a coupled-line backward coupler is described with arbitrary tight / loose coupling and broad bandwidth; (2) a compact enhanced-bandwidth hybrid ring coupler is described with increased bandwidth and decreased size; and (3) a dual-band branch-line coupler that is not limited to a harmonic relation between the bands. These variations are preferably implemented in a microstrip fabrication process and may use lumped-element components. The couplers and coupling techniques are directed at increasing the utility while decreasing the size of high-frequency couplers, and are suitable for use with separate coupler or couplers integrated within integrated devices.

A microwave geodimeter relates to a distance measuring device, in particular to a high-accuracy noncontact distance measuring device with microwave method, mainly suitable for measuring material lever or liquid lever in containers or storehouses in industrial production engineering. The invention provides a microwave geodimeter which can realize a high-resolution distance measuring by using the prior electric elements. The invention comprises a transmitting device, a receiving device and a signal processing device. The transmitting device is provided with a first clock signal generator, a second clock signal generator, a pulse generator, a local oscillator, a switch, a power amplifier, a ring coupled circuit and an antenna. The receiving device is provided with an antenna, a ring coupled circuit and a low-noise amplifier; the input of the low-noise amplifier is connected with the output of the ring coupled circuit of the receiving device. The signal processing device is provided with a receiving / transmitting switch unit, a filter, a second clock signal generator, a pulse generator, a sampling smoothing circuit, a peak value testing circuit, a microprocessor and a display device.

A cyclonic debris evacuation apparatus and method for removing debris in a pumping system. The apparatus includes a valve rod, a cyclone component, cup component, ring component, and ring coupler component. The cup component is composed of a high density poly-fiber material that helps in creating a positive seal between the cup component and barrel interior during pumping operations, helping to direct solids into the cup component and thereby preventing them from travelling southward in the direction of the barrel and causing damage. The cup component can include a specialized leading edge adapted to direct solids into the cup component. The apparatus can include a carbide ring that prevents solids from traveling further down onto the pump plunger section. The carbide ring can incorporate ports that feed into a main channel flow. The apparatus can include a top plunger adapter capable of connecting with a sucker rod.

The invention relates to a wide-frequency rat-race coupler based on novel composite right-left hand (CRLH) transmission line technology and a small MIMO system based on the rat-race coupler, so as to solve the technical problems that the prior rat-race coupler and the applied system are narrow in working bandwidth and large in size. The MIMO system is provided with a wide-frequency rat-race coupler; the wide-frequency rat-race coupler comprises three CRLH unit groups, that is, a first CRLH unit group, a second CRLH unit group and a third CRLH unit group; each group is formed by two CRLH units in connection to form a head end and a tail end; and each adjacent head end and the tail end of each group are connected to form a signal transmission port. The rat-race coupler of the invention can be widely applied to a Bulter matrix feed network, a microwave power synthesis and decomposition network, a sum-difference device, an isolator, a beam-adjustable antenna, an input / output system, any microstrip antenna array in need of decoupling and a multi-channel communication system.

The invention provides a wavelength division-time division hybrid passive optical network system, which comprises a central office, a plurality of optical network units and a remote node, wherein the remote node is positioned between the central office and the plurality of optical network units; the central office is provided with a plurality of light sources for emitting downlink signal light of various wavelengths, a plurality of receivers for receiving uplink signal light emitted by the plurality of optical network units and transmitted by the remote node respectively, and a plurality of multiplexer / demultiplexers for multiplexing and demultiplexing the downlink signal light and the uplink signal light; the remote end node is used for multiplexing the downlink signal light from the central office and demultiplexing the uplink signal light from the optical network units; and each optical network unit is provided with an internal annular coupler, a light separating unit for separating downlink signal light into signal light and injection light, a downlink data receiver for receiving separated signal light, and an MEMS (Micro Electro Mechanical System) tunable laser for receiving injection light and generating uplink signal light.

The invention discloses an improved on-line optical cable monitoring method. In an optical time domain reflectometer, a laser connected with a ring coupler is a DFB-LD laser with a refrigerator; the refrigerator and the DFB-LD laser are respectively connected with a refrigerator driving circuit and a laser driving circuit; the refrigerator driving circuit, the laser driving circuit and an A / D conversion circuit are connected with an FPGA control unit; and the FPGA control unit is connected with a network communication interface. During monitoring, the refrigeration current of the refrigerator is 500-900mA, pulse signals Pulse1 for starting the laser driving circuit and square signals Pulse2 for starting the refrigerator driving circuit, which are generated by the FPGA control unit, have the same period of 10-30s, and the duty ratio of the square signals Pulse2 is less than or equal to 50 percent. The method has the advantages of reducing light intensity noise, having small OTDR curve waves, little influencing optical signals in communication service, meeting the requirement of on-line optical cable monitoring, and improving the accuracy of analyzing and judging optical cable states and event points by on-line optical cable monitoring equipment.

A user equipment (UE) for cancelling a self-interference (SI) signal is disclosed. The UE includes a rat-race coupler, a plurality of transceiving antennas capable of transmitting and receiving signals, a receive antenna, a transmission (Tx) chain connected to an input port when the rat-race coupler uses one port as the input port, and a reception (Rx) chain connected to the receive antenna and an isolated port when the rat-race coupler uses the one port as the input port.

The invention discloses a narrow-band filtering annular coupler based on a quadruple-mode dielectric resonator, comprising a quadruple-mode dielectric resonator, a metal cavity and four feed metal rods, wherein the four feed metal rods get close to the quadruple-mode dielectric resonator in parallel, and form coupling with the quadruple-mode dielectric resonator; the four feed metal rods are respectively first, second, third and fourth metal rods, the connection line of the second metal rod and the center point of the metal cavity is vertical to the connection line of the third metal rod and the center point of the metal cavity, the first metal rod is located on the axis surfaces of the second and third metal rods, and the connection line of the fourth metal rod and the metal cavity is vertical to the connection line of the first metal rod and the center point of the metal cavity. The narrow-band filtering annular coupler has the characteristics of being miniaturized and high in integration degree, and has creativity and applicability.

The invention discloses a substrate integrated waveguide filter coupler based on an orthogonal degenerate mode, which comprises three resonant cavities, four feeder lines and four ports. The functionsof the integrated band-pass filter and the ring coupler are integrated, the cascade connection of two traditional filters and one ring coupler can be replaced in terms of function, and the volume isgreatly reduced. The zero-degree and 180-degree phase difference between the two output ports of the filter coupler is realized by using the forward and reverse electric fields of the quadrature degenerate modes of the substrate integrated waveguides TE102 and TE201. No additional circuits are needed to reduce the circuit complexity. The substrate integrated waveguide filter coupler provided by the invention has good circuit performance and the characteristic of high integration.

The invention relates to a high-isolation circularly polarized balanced radar radio frequency front-end structure, which comprises a two layers of dielectric plates, four 2*2 microstrip chamfered circular polarization antenna subarrays arranged on the top dielectric plate and a feed network arranged on the bottom dielectric plate, and is characterized in that and metal bottoms of the two layers of dielectric plates are connected; and the feed network comprises four feed probes, two annular couplers, two quadrature couplers, a grounding patch, two matched resistors, a signal transmitting terminal and a signal receiving terminal. The high-isolation circularly polarized balanced radar radio frequency front-end structure is simple in structure, low in cost and high in reliability, can easily realize good isolation between the transmitting terminal and the receiving terminal and improves the interference resisting ability. Meanwhile, acting as a balanced radar front-end system, the high-isolation circularly polarized balanced radar radio frequency front-end structure can solve problems of antenna reflection and partial coupling while well realizing leakage cancellation, and can be applied to various radar communication and short-range detection occasion requiring shared transmitting and receiving and high isolation.

The invention discloses a monopulse antenna array of an integrated broadband miniaturization and difference phase comparison network. The monopulse antenna array comprises a miniaturized broadband plane and difference phase comparison network and a plane yagi array antenna; the miniaturized broadband plane and difference phase comparison network is composed of a double-faced parallel strip line, and comprises a first-level network and a second-level network, the first-level network comprises a first-level network and a second-level network, the first-level network comprises a first-level annular coupler, the second-level network comprises two second-stage annular couplers, a phase inverter is arranged at the annular part of the couplers, and electrical connection is formed between the upper layer and the lower layer of the phase inverter through a metallized through hole. The bandwidth of the integrated broadband miniaturization and difference phase comparison network is increased, the monopulse antenna array has smaller structure size and is smaller than the size of a general T-shaped power dividing feed network, and a transition structure between the feed network and the antenna is not needed; by adopting a plane structure, the integral construction is greatly simplified, the processing difficulty is low, and the monopulse antenna array is easy to large-scale production, is easy to be integrated with other plane circuits, is particularly suitable for integration in radar systems, and is extremely convenient to install and debug.

Compensation type microstrip resonance unit consists of four pieces of microstrip open-circuit line in helicoid form. There are two pieces of compensation structures of microstrip open-circuit line with one in long annulus form and the other in short annulus form. Annular coupler includes six pieces of compensation type microstrip resonance unit in helicoid form instead of traditional microstrip line in 1 / 4 wavelength. Microstrip open-circuit lines with long annulus form and in short annulus form are located inside annular coupler. Resonance unit is as a transmission line at fundamental frequency, and possesses strong inhibiting effect at harmonic second order and third-order. The disclosed annular coupler possesses advantages of inhibiting harmonic, reducing area of circuit, and small insertion loss.

According to an embodiment of the present disclosure, a transformable lighting apparatus, comprises support frames respectively coupled with two sides of a socket, a ring coupler coupled with respective ends of the support frames, operational frames respectively coupled with the respective ends of the support frames, pivoted by a motor, and respectively including trenches coupled with a motor support, the motor support encompassing the motor and including a hole into which the ring coupler is fitted and connection terminals around the hole, and a cover coupled with the operational frames and formed of an accordion-shape, non-woven fabric to be transformable by rotation of the operational frames.

A user equipment (UE) for cancelling a self-interference (SI) signal is disclosed. The UE includes a rat-race coupler, a plurality of transceiving antennas capable of transmitting and receiving signals, a receive antenna, a transmission (Tx) chain connected to an input port when the rat-race coupler uses one port as the input port, and a reception (Rx) chain connected to the receive antenna and an isolated port when the rat-race coupler uses the one port as the input port.

The invention relates to the field of optical current sensors, and particularly relates to a magneto optical current transducer, which comprises a laser, a ring coupler, a polarization-maintaining transmission optical fiber, a one-to-two optical fiber branching device, a magneto optical module, a ferromagnetic concentrator ring, and a differential demodulator; and the magneto optical module comprises a collimator, a polarizer, a lambda / 4 waveplate, rectangular optical glass and magnetized bodies at two ends. According to the magneto optical current transducer, based on poloidal surface magneto optical Kerr effects, the differential demodulator is matched, the magnitude of power frequency alternating current in a transmission line is indirectly detected through detecting the relative value of magnetized surface reflected light polarization deflection angles, and the detection precision and the device stability are improved.

Apparatus and methods are provided for coupling a first component to a second component of a tool coupler. A first component includes a ring coupler having mating features and rotatable between first and second positions; an actuator to rotate the ring coupler between the positions; and a second component comprising a profile complementary to the ring coupler. A method includes inserting a central shaft of the first component into a housing of the second component; rotating a ring coupler around the central shaft; and engaging mating features of the ring coupler with a profile. A method also includes clamping a profile using the ring coupler and a second ring coupler. A method also includes moving a second ring coupler vertically relative to the housing to engage a profile.

The invention discloses a CPU (central processing unit) temperature detecting device and a system for acquiring the temperature of a CPU by the aid of the CPU temperature detecting device. The CPU temperature detecting device comprises one or a plurality of sensing modules, each sensing module comprises a combined fiber bragg grating sensing element, a miniature groove is arranged on each radiating fin base of the CPU, and the combined fiber bragg grating sensing elements are fixed into the miniature grooves, are cascaded with common optical fibers and then connected with each other by annular couplers to form a distributed optical fiber sensing array. The system further comprises super-radiation light emitting diodes, circulators, a demodulation module, a photoelectric conversion and information conditioning module, a signal processing module and a display module. The optical fiber sensing technology is creatively introduced into the field of test for radiating properties of servers, test for the radiating property of CPUs of multiple servers can be simultaneously completed in an online manner, test sample indexes capable of being completed are increased, testing period is shortened, and testing efficiency is improved.

A magnetic cable fastener includes a magnetic fastener, a boss, a base, and a loop coupler attached to the base. The loop coupler is attached to the base and is operable to attach to another structure. The loop coupler may be a cable, wires, electrical conduit, rope, adjustable strap, and a tie wrap or suitable object. According to one embodiment, the loop coupler may further include at least two fingers. The fingers are operative to flex or compress appropriately to permit the cables to enter the fingers. According to another embodiment, the loop coupler is a solid loop to permit for example, a cable strap to be inserted and attach the cable strap to the loop coupler. Thus, the magnetic cable fastener may secure one or more cables via the loop fingers or solid loop or other suitable cable coupler.

The invention discloses a rapid optical fiber coding identification system and identification method based on narrow-band light waves. The identification system comprises a laser light source used foroutputting a narrow-band spectrum, an annular coupler used for forming a reflection loop, a photoelectric detection module used for collecting reflected light signals, a fiber bragg grating combination sequence used for representing fiber coding and a main control module used for controlling. The main control module is connected with the laser light source and the photoelectric detection module,the output end of the laser light source and the photoelectric detection module are respectively connected to the annular coupler through optical fibers, and the output end of the annular coupler is connected with the fiber bragg grating combination sequence through optical fibers. The fiber grating demodulator solves the problems that a traditional fiber grating demodulator is low in speed, poorin distance measurement precision and high in price when recognizing a fiber grating combination sequence, high-speed recognition and high-precision distance measurement are achieved through narrow-band spectrum output and the photoelectric detection module, the price is low, and the fiber grating demodulator is suitable for large-area popularization.

The embodiment of the invention belongs to the technical field of radio frequency, and provides an injection locked oscillation circuit based on a ring coupler and an injection locked oscillator. A single-ended reference frequency signal is converted into a corresponding positive-end differential signal and a corresponding negative-end differential signal through the ring coupler module, and the reference frequency signal is injected into a buffer module through the signal injection module, so that the buffer module outputs a corresponding oscillation feedback signal. The oscillation feedbacksignal is used for locking the frequency of an initial oscillation signal generated by a resonance loop module into a frequency range set by the reference frequency signal source, and then an output matching module is used for receiving the buffer isolation oscillation signal outputted by the buffer module, and the second harmonic output of the buffer isolation oscillation signal is subjected to energy enhancement processing to output a corresponding oscillation output signal, so that the phase error of the two differential signals injected by the signal injection module is reduced, the insertion loss is reduced, and the frequency locking range of the injection locking oscillation circuit is increased.

The invention discloses an ultra-wideband annular coupler. The coupler comprises a PCB; four transmission lines are arranged on the front surface of the PCB; each transmission line comprises a first quarter-wavelength transmission line, an n-shaped second transmission line and a third quarter-wavelength transmission line which are connected in sequence; ports of the first quarter-wavelength transmission lines are arranged at the edge of the PCB; ports of the four third quarter-wavelength transmission lines are sequentially connected through three connecting microstrip lines; and ports of the two third quarter-wavelength transmission lines at the head and the tail are connected with coplanar coupling strip lines with one ends grounded in a short-circuit mode. According to the annular coupler, a three-fourths wavelength transmission line of a traditional annular coupler is replaced by a mode that quarter-wavelength transmission lines with one short-circuited ends are coupled with one another, so that the size of a circuit is reduced, and the working bandwidth of the circuit is expanded; and meanwhile, the broadband characteristic of the circuit is realized by using the matching network, and the requirement of a future communication system on the broadband of the device is met.

A miniaturized multilayer hybrid-phase signal splitter circuit is proposed, which is fully equivalent in function to a conventional rat-race coupler, but with a specialized circuit layout structure that allows its IC implementation to be more miniaturized than the conventional rat-race coupler. The proposed hybrid-phase signal splitter circuit features the use of a multilayer substrate for the layout of six transmission lines in such a manner that the transmission lines in the middle layer are inductively coupled to the transmission lines on the overlying layer as well as the transmission lines on the underlying layer to form a Marchand balun. In IC implementation, the required layout area is only about 10% of the layout area for the conventional rat-race coupler.

The present invention relates to a super surface-based small-scale microwave frequency-reconfigurable coupler, which mainly solves the technical problems of large size, high cost, high loss and small tuning range in the prior art. According to the technical scheme of the invention, the super surface-based small-scale microwave frequency-reconfigurable coupler is composed of an upper-layer circular structure and a lower-layer circular structure, wherein the upper-layer circular structure and the lower-layer circular structure are the same in both radius and thickness. The upper-layer circular structure and the lower-layer circular structure are structurally fixed and tuned at a relative angle through a center hole (4) arranged at the circle centers of the upper-layer circular structure and the lower-layer circular structure, and a metal rod arranged to penetrate through the center hole (4). The upper surface of the upper-layer circular structure is a super surface. An annular coupler is fixedly attached to the upper surface of the lower-layer circular structure. The lower surface of the lower-layer circular structure is a ground plane. In this way, the above technical problems in the prior art are well solved. The super surface-based small-scale microwave frequency-reconfigurable coupler can be applied to the industrial production of microwave frequency-reconfigurable couplers.

The invention discloses a multi-port wide-spectrum shaping device which is used for spectrum global sampling of computational spectral measurement. The ring resonator comprises a main ring resonator and a plurality of secondary ring resonators, the main annular resonator comprises an annular waveguide and a plurality of linear waveguides which are arranged outside the annular waveguide and are respectively coupled with the annular waveguide; the secondary annular resonators are arranged in the ring of the annular waveguide and are respectively coupled with the main annular coupler, the secondary annular resonators are sequentially arranged to form a curve, and any two adjacent secondary annular resonators are mutually coupled; one port of the linear waveguide is used as an input port of the device, and a plurality of other ports are used as output ports of the device; shaping parameters of the multi-port wide-spectrum shaping device are configured to enable transmission functions from the input port to the output ports to be different from one another. The invention also discloses a computational spectrometer. According to the invention, no extra multi-path light splitting device is needed, and the size and loss of the device are greatly reduced while the performance is maintained.