30results about How to "Avoid cross-coupling" patented technology

Described is a method wherein a seal ring is formed by patterning multiple layers each comprised of a dielectric layer with conductive vias covered by a conductive layer. Discontinuities are made in the seal ring encapsulating an integrated circuit. There are no overlaps between different sections of the seal ring thereby reducing coupling of high frequency circuits in the seal ring structures. In addition, the distance between signal pads, circuits and the seal ring are enlarged. Electrical connection is made between deep N-wells and the seal ring. This encapsulates the integrated circuit substrate and reduces signal coupling with the substrate.

The present invention relates to an integrated Doherty type amplifier arrangement and an amplifying method for such an arrangement, wherein a lumped element hybrid power divider (12) is provided for splitting input signals of main and peak amplifier stages (20, 30, 40) at predetermined phase shifts and non-equal division rates and at least one wideband lumped element artificial line (Zl, Z2) combined with wideband compensation circuit for receiving said first amplified signal and for applying said predetermined phase shift to said first amplified signal and its higher harmonics. Thereby, the low gain of the peak amplifier is compensated by providing the non-equal power splitting at the input. Moreover, the use of the lumped element hybrid power divider leads to an improved isolation between the input ports of the main and peak amplifiers decreasing final distortions of the output signal.

The invention discloses an electric automobile wireless charging method and system based on a double transmission-double picking mode. The electric automobile wireless charging method based on the double transmission-double picking mode comprises the steps of inputting direct current voltage into two inverter circuits; enabling an output end of the first inverter circuit to load high frequency alternating current to a first primary side transmitting coil through a first primary side resonance circuit so as to generate a high frequency magnetic field; generating electric energy after sensing the high frequency magnetic field through a first secondary side picking coil; inputting the electric energy into a first buck-boost converter through a first secondary side resonance circuit and a first rectification filter circuit; enabling an output end of the second inverter circuit to load high frequency alternating current to a second primary side transmitting coil through a second primary side resonance circuit to generate a high frequency magnetic field; generating electric energy after sensing the high frequency magnetic field through a second secondary side picking coil; inputting theelectric energy into a second buck-boost converter through a second secondary side resonance circuit and a second rectification filter circuit; converting the electric energy into load electric energyby using the two buck-boost converters; and outputting the load electric energy to a series-connected load.

The invention relates to a sensor of a micro-electromechanical system (MEMS), in particular to a high-gravity (g) acceleration sensor in a plane of the MEMS based on a resonance tunnelling structure (RTS), which solves the problems that the structure of the conventional MEMS high-g acceleration sensor cannot realize horizontal acceleration measurement and a detection result is easy to influence by a temperature. The high-g acceleration sensor in the plane of the MEMS based on the RTS comprises a silicon-based frame and a quality block, wherein two sides of the quality block are fixed with the silicon-based frame respectively by an independent supporting beam and two combination beams; the independent supporting beam is arranged along a central line of the quality block; the two combination beams are symmetrical about the central line of the quality block which is taken as a symmetry axis; each combination beam comprises a detection beam and two connection beams; a strain pressure sensitive element is arranged on the detection beam; the thickness and width of the detection beam are smaller than those of the connection beams; and the independent supporting beam, the quality block and the connection beams in the combination beams are equal in thickness. The acceleration sensor can realize the horizontal acceleration measurement and is reasonable and simple in structure, simple in process, and less influenced by an environmental temperature, works normally in a high-temperature environment, realizes three-axis integration easily and is applied to measurement of an impaction acceleration with a high-g value.

The invention relates to a bi-axial MEMS in-plane high-g sensor based on a micro beam detection structure. By means of the bi-axial MEMS in-plane high-g sensor, acceleration measurement in the horizontal direction can be achieved. The bi-axial MEMS in-plane high-g sensor comprises a silica-based supporting frame and four sensitive structures, wherein the silica-based supporting frame comprises a silica-based frame and a central anchor block fixedly connected to the surface of the silica-based frame, the four sensitive structures are evenly distributed around the central anchor block, and every four voltage dependent resistors in the same axial direction form a Wheatstone full bridge. Detection can be carried out in the X direction and the Y direction through two different units respectively, namely, two independent detection units in the X direction and the Y direction, and therefore measurement of high-g acceleration signals in the horizontal plane can be achieved. The bi-axial MEMS in-plane high-g sensor is reasonable and simple in structure, low in transverse sensitivity, easy to integrate, good in sensitivity and overload resistance and suitable for measuring the high-g impact acceleration, and the machining process is simple.

The invention discloses a resonator, which comprises a first branch line, a second branch line and a connecting portion used for connecting the first branch line and the second branch line, and is characterized in that the first branch line and the second branch line are spaced by a gap, and the first branch line and the second branch line extend in parallel by taking the connecting portion as an initial position, form an un-closed surrounding structure and enable the connecting portion to be located inside the surrounding structure. According to the resonator, the strongest part of a magnetic field can be avoided from being directly exposed, coupling between two non-adjacent resonators can be avoided, and the performance of a filter is improved. The invention further discloses a filter provided with the resonator.

The invention discloses a navigation system for an underwater glider and an attitude angle correcting and backtracking decoupling method and belongs to the technical field of navigation positioning of the underwater gliders. The combined navigation system comprises a signal processing (DSP) module, a microelectromechanical systems (MEMS), an inertial measurement unit (IMU) and the like. By using pitching or transverse rolling motion, cross coupling of attitude angles (a course angle, a pitching angle and a transverse roll angle) is more obvious; by using the cross coupling among the attitude angles, the output of the attitude angles is inaccurate or even mistaken, and further the calculation of the subsequent speed, position and other navigation information is mistaken; the cross coupling among the attitude angles is eliminated by using an attitude angle backtracking decoupling method based on a backtracking decoupling idea. According to the system design, the demands of the navigation system of the underwater glider on low power consumption, small size and long endurance are met; according to the attitude angle backtracking decoupling method, the cross coupling among the attitude angles is effectively eliminated, the precision of the attitude angles is greatly improved, and the aims of long endurance, low power consumption and high-precision navigation positioning of the underwater glider are achieved.

The invention discloses a triaxial integrated all-optical-fiber inertial sensing system, which comprises three optical fiber inertial sensing combined modules with vertical installation directions, wherein each module consists of a closed-loop optical fiber gyroscope and an accelerometer; a free port of a coupler in an optical path system of the optical fiber gyroscope is used as a light source input port of the optical fiber accelerometer so as to measure information of an angular speed and an acceleration of the same axial direction at the same time and realize one-dimensional inertial integration; meanwhile, the three axial optical fiber gyroscopes share a light source and a detector; the three gyroscopes adopt a multi-path multiplexing technology, so cross coupling is avoided; compared with the conventional all-optical-fiber sensing system, the triaxial integrated all-optical-fiber inertial sensing system has the advantages that: five light sources and two detectors are eliminated; furthermore, integration and minimization of the system, low cost and low power consumption are realized; and the stability and the reliability are improved.

The invention discloses an inertial measurement system based on a high-integration-level accelerometer. The inertial measurement system comprises three orthorhombic all-optical-fiber inertial measurement units, wherein each all-optical-fiber inertial measurement unit consists of an accelerometer and a closed-loop optical fiber gyroscope; the three closed-loop optical fiber gyroscopes share one light source; and a free port of a coupler in each closed-loop optical fiber gyroscope supplies an input light source to the corresponding accelerometer. By adopting a multi-path multiplexing technology, the three accelerometers share one detector, so cross coupling is avoided and five light sources and two detectors are saved, the integration level, the stability and the reliability are improved, and low cost, low power consumption and minimization are realized.

The invention improves Techebyshev type microwave filter. Its basic structure adopts distributive coupling line structure. The length of (2)-(N-1) node micro wave transmission line in the middle is 1 / 4 wave length of designed frequency, and one end of the transmission line connects to ground via micro through-hole (V2-VN-1). The both end of two node in head and end(1),(N)micro wave transmission line connects to ground via micro through-hole (V1,V1'),(VN,VN'). The signal coupling adopts tapped line structure (T1, T2). The distance from (T1, T2) to(V1,V1'),(VN,VN')is L1,L2. By adjusting L1 and L2, implement two transmission zeros at appropriate frequency point and improve outband rejection property.

A phased array antenna system with two dimensional scanning includes a two dimensional array A of antenna elements A1,1 to A12,12 arranged in lines; each line is associated with a respective first rank corporate feed network 161 to 1612 having outputs 171,1 to 1712,12 connected to respective antenna elements A1,1 to A12,12 and inputs for variable relative phase input signals. These corporate feed networks each have first and second inputs A1 / B1 to A12 / B12 connected respectively to outputs 171 CD / 1712CD to 171EF / 1712EF of different second rank corporate feed networks 16CD and 16EF. The corporate feed networks 161 to 16EF convert input signals of variable relative phase into relatively greater numbers of output signals for a phased array. The system (30) includes a phase varying circuit 40 for varying phase differences between input signals to each second rank corporate feed network 16CD or 16EF and between input signals to different second rank corporate feed networks 16CD and 16EF to provide control of antenna beam direction in two dimensions.

The invention provides an electric energy and signal parallel wireless transmission system based on multi-modulation-wave composite SPWM control. The electric energy and signal parallel wireless transmission system comprises a primary circuit and a secondary circuit. In the primary circuit, high-speed serial bits form n paths of parallel binary sequences through an encoder, the n paths of parallelbinary sequences are sent to a multi-modulation-wave composite SPWM control circuit to be subjected to amplitude modulation, then composite pulse waves are output based on SPWM control, and a composite high-frequency current is generated in a primary coil in a magnetic coupling coil. In the secondary circuit, a secondary coil and a secondary electric energy compensation capacitor form an electricenergy transmission channel, electric energy modulation wave frequency components in the composite high-frequency current are separated to supply power to a load resistor, a signal separation channelnetwork separates n paths of signal modulation wave components with different frequencies, and a signal demodulation circuit network demodulates signals and then sends the signals to a decoder to recover high-speed serial bits. According to the invention, no cross coupling interference and stable parallel synchronous transmission of electric energy and multiple paths of signals are realized, andthe signal transmission rate is effectively improved while the stability of the electric energy is ensured.

The invention belongs to the field of radar technologies and discloses a dual-polarization radar. The dual-polarization radar comprises a transmitting module, a receiving module, a receiving and transmitting switching module, a first polarization direction antenna and a second polarization direction antenna, wherein the transmitting module is used for generating a pulse pair signal, and the pulsepair signal comprises a first pulse signal and a second pulse signal with different radio frequencies; the receiving module is used for receiving backscattered echo signals of the first pulse signal and the second pulse signal; the receiving and transmitting switching module is used for transmitting the first pulse signal to the first polarization direction antenna, transmitting the second pulse signal to the second polarization direction antenna and transmitting a first polarization direction echo signal and a second polarization direction echo signal to the receiving module; the first polarization direction antenna is used for transmitting the first pulse signal and receiving the first polarization direction echo signal; and the second polarization direction antenna is used for transmitting the second polarization pulse signal and receiving the second polarization direction echo signal. Through the dual-polarization radar, an alternate sending, simultaneous receiving and single-receiving-channel radar structure is realized, and the dual-polarization radar has good echo signal correlativity and monitoring precision.

The invention discloses a triaxial integrated all-optical-fiber inertial sensing system, which comprises three optical fiber inertial sensing combined modules with vertical installation directions, wherein each module consists of a closed-loop optical fiber gyroscope and an accelerometer; a free port of a coupler in an optical path system of the optical fiber gyroscope is used as a light source input port of the optical fiber accelerometer so as to measure information of an angular speed and an acceleration of the same axial direction at the same time and realize one-dimensional inertial integration; meanwhile, the three axial optical fiber gyroscopes share a light source and a detector; the three gyroscopes adopt a multi-path multiplexing technology, so cross coupling is avoided; compared with the conventional all-optical-fiber sensing system, the triaxial integrated all-optical-fiber inertial sensing system has the advantages that: five light sources and two detectors are eliminated; furthermore, integration and minimization of the system, low cost and low power consumption are realized; and the stability and the reliability are improved.

The invention relates to the technical field of accelerometers, and discloses a quartz vibrating beam accelerometer sensitive assembly. The assembly comprises an outer frame, a flexible supporting piece, an isolation frame, an outer connecting piece, an inner connecting piece, a bracket, a detection mass block and a vibrating beam, the isolation frame is positioned in the outer frame; the outer side of one end of the isolation frame is connected with the inner side of the outer frame; the inner side of the other end of the isolation frame is connected with the bracket through inner connectors;one end of the vibration beam is connected with the detection mass block, the other end of the vibration beam is connected with the support, flexible supporting pieces are arranged between the upperend face of the support and the lower end face of the detection mass block and symmetrically distributed on the two sides of the vibration beam, the vibration beam and the flexible supporting pieces are not coplanar, and the flexible supporting pieces on the two sides are coplanar. Therefore, by additionally arranging the isolation frame and related components, a vibration beam energy dissipationchannel can be blocked, a double-interdigital structure is simplified into a single-interdigital structure, and a narrow gap is avoided. Moreover, the isolation frame can block the introduction of external thermal stress, thereby improving the temperature environment adaptability of the accelerometer.

The invention relates to a waveguide display element comprising a waveguide body and an in-coupling grating (21) arranged to the waveguide body. The in-coupling grating (21) is configured to couple incoming light into the waveguide body into two separate directions (26A, 26B) using opposite diffraction orders (IC:+1, IC:−1) for splitting the field of view of the incoming light. Further the in-coupling grating (21) is configured, typically by setting its period suitably short, such that said coupling takes place only at wavelengths below a threshold wavelength residing in the visible wavelength range. The invention also relates to a waveguide stack (51 A, 51 B, 51 C).

The invention relates to a position sensor (100) for an electronic position measuring device (1000), said position sensor (100) comprising a signal generation device (110) for generating a periodic magnetic signal (S), and an electric power supply device (120) for supplying the signal generation device (110) with electric energy. The position (x) of the position sensor (100) is determined by means of the position measuring device (1000).

The invention relates to a waveguide display element comprising a waveguide body and an in-coupling grating arranged to the waveguide body. The in-coupling grating is configured to couple incoming light into the waveguide body into two separate directions using opposite diffraction orders for splitting the field of view of the incoming light. Further the in-coupling grating is configured, typically by setting its period suitably short, such that said coupling takes place only at wavelengths below a threshold wavelength residing in the visible wavelength range. The invention also relates to a waveguide stack.

The invention discloses an inertial measurement system based on a high-integration-level accelerometer. The inertial measurement system comprises three orthorhombic all-optical-fiber inertial measurement units, wherein each all-optical-fiber inertial measurement unit consists of an accelerometer and a closed-loop optical fiber gyroscope; the three closed-loop optical fiber gyroscopes share one light source; and a free port of a coupler in each closed-loop optical fiber gyroscope supplies an input light source to the corresponding accelerometer. By adopting a multi-path multiplexing technology, the three accelerometers share one detector, so cross coupling is avoided and five light sources and two detectors are saved, the integration level, the stability and the reliability are improved, and low cost, low power consumption and minimization are realized.

The invention improves Techebyshev type microwave filter. Its basic structure adopts distributive coupling line structure. The length of (2)-(N-1) node micro wave transmission line in the middle is 1 / 4 wave length of designed frequency, and one end of the transmission line connects to ground via micro through-hole (V2-VN-1). The both end of two node in head and end(1),(N)micro wave transmission line connects to ground via micro through-hole (V1,V1'),(VN,VN'). The signal coupling adopts tapped line structure (T1, T2). The distance from (T1, T2) to(V1,V1'),(VN,VN')is L1,L2. By adjusting L1 and L2, implement two transmission zeros at appropriate frequency point and improve outband rejection property.

A sensor switch including a first sensor electrode and a second sensor electrode at least partially surrounding the first sensor electrode. An evaluation and control circuit of the sensor switch is configured to generate a switch output signal if a first sensor electrode attenuation signal indicates a high signal attenuation, a second sensor electrode attenuation signal indicates a low signal attenuation, and a cross-coupling signal from the first to the second electrode indicates a low cross-coupling.

The invention discloses a three-axis capacitive accelerometer. The three-axis capacitive accelerometer comprises: a substrate, a movable part and a plurality of fixed electrodes; the surface of the substrate has a fixed anchor point; the movable part is arranged on the fixed anchor point; The movable part has a first mass, a second mass and a third mass; a plurality of fixed electrodes are divided into a first electrode group, a second electrode group and a third electrode group; the first electrode group is used for the second mass The block forms an X-axis detection capacitor to detect the acceleration input along the X-axis; the second electrode group is used to form a Y-axis detection capacitor with the first mass block to detect the acceleration input along the Y-axis; the third electrode group is used to interact with the first mass block. The three-mass form a Z-axis detection capacitor to detect acceleration input along the Z-axis. The technical solution of the present invention can realize the detection of accelerations in the X-axis, Y-axis and Z-axis directions in a rectangular three-dimensional coordinate system through three mass blocks, and by setting the motion dimension of the mass blocks, the problem of cross-axis coupling is avoided.

The invention discloses a resonator, which comprises a first branch line, a second branch line and a connecting portion used for connecting the first branch line and the second branch line, and is characterized in that the first branch line and the second branch line are spaced by a gap, and the first branch line and the second branch line extend in parallel by taking the connecting portion as an initial position, form an un-closed surrounding structure and enable the connecting portion to be located inside the surrounding structure. According to the resonator, the strongest part of a magnetic field can be avoided from being directly exposed, coupling between two non-adjacent resonators can be avoided, and the performance of a filter is improved. The invention further discloses a filter provided with the resonator.

The invention proposes a parallel wireless transmission system of electric energy and signals controlled by multi-modulation wave composite SPWM, including a primary circuit and a secondary circuit. In the primary side circuit, the high-speed serial bits form n-way parallel binary sequences through the encoder and send them to the multi-modulation wave composite SPWM control circuit for amplitude modulation modulation, and then output composite pulse waves based on SPWM control, which are generated by the primary side coil in the magnetic coupling coil Composite high frequency current. In the secondary circuit, the secondary coil and the secondary power compensation capacitor form a power transmission channel, which separates the frequency component of the power modulation wave in the composite high-frequency current to supply power to the load resistor, and the signal separation channel network separates n channels of signal modulation with different frequencies Wave component, the signal demodulation circuit network demodulates the signal and sends it to the decoder to recover high-speed serial bits. The invention realizes no cross-coupling interference and stable parallel synchronous transmission of electric energy and multi-channel signals, and effectively improves the signal transmission rate while ensuring the stability of electric energy.

A sensor switch including a first sensor electrode and a second sensor electrode at least partially surrounding the first sensor electrode. An evaluation and control circuit of the sensor switch is configured to generate a switch output signal if a first sensor electrode attenuation signal indicates a high signal attenuation, a second sensor electrode attenuation signal indicates a low signal attenuation, and a cross-coupling signal from the first to the second electrode indicates a low cross-coupling.

The invention relates to a bi-axial MEMS in-plane high-g sensor based on a micro beam detection structure. By means of the bi-axial MEMS in-plane high-g sensor, acceleration measurement in the horizontal direction can be achieved. The bi-axial MEMS in-plane high-g sensor comprises a silica-based supporting frame and four sensitive structures, wherein the silica-based supporting frame comprises a silica-based frame and a central anchor block fixedly connected to the surface of the silica-based frame, the four sensitive structures are evenly distributed around the central anchor block, and every four voltage dependent resistors in the same axial direction form a Wheatstone full bridge. Detection can be carried out in the X direction and the Y direction through two different units respectively, namely, two independent detection units in the X direction and the Y direction, and therefore measurement of high-g acceleration signals in the horizontal plane can be achieved. The bi-axial MEMS in-plane high-g sensor is reasonable and simple in structure, low in transverse sensitivity, easy to integrate, good in sensitivity and overload resistance and suitable for measuring the high-g impact acceleration, and the machining process is simple.

The invention discloses a navigation system for an underwater glider and an attitude angle correcting and backtracking decoupling method and belongs to the technical field of navigation positioning of the underwater gliders. The combined navigation system comprises a signal processing (DSP) module, a microelectromechanical systems (MEMS), an inertial measurement unit (IMU) and the like. By using pitching or transverse rolling motion, cross coupling of attitude angles (a course angle, a pitching angle and a transverse roll angle) is more obvious; by using the cross coupling among the attitude angles, the output of the attitude angles is inaccurate or even mistaken, and further the calculation of the subsequent speed, position and other navigation information is mistaken; the cross coupling among the attitude angles is eliminated by using an attitude angle backtracking decoupling method based on a backtracking decoupling idea. According to the system design, the demands of the navigation system of the underwater glider on low power consumption, small size and long endurance are met; according to the attitude angle backtracking decoupling method, the cross coupling among the attitude angles is effectively eliminated, the precision of the attitude angles is greatly improved, and the aims of long endurance, low power consumption and high-precision navigation positioning of the underwater glider are achieved.

Described is a method wherein a seal ring is formed by patterning multiple layers each comprised of a dielectric layer with conductive vias covered by a conductive layer. Discontinuities are made in the seal ring encapsulating an integrated circuit. There are no overlaps between different sections of the seal ring thereby reducing coupling of high frequency circuits in the seal ring structures. In addition, the distance between signal pads, circuits and the seal ring are enlarged. Electrical connection is made between deep N-wells and the seal ring. This encapsulates the integrated circuit substrate and reduces signal coupling with the substrate.

The invention relates to the technical field of sensing, and discloses a two-parameter in-situ sensor based on a waveguide grating, a sensing system and a preparation method.The sensor comprises an optical waveguide substrate, and a first straight optical waveguide and a second straight optical waveguide are arranged in the optical waveguide substrate in parallel; the two ends of the first straight optical waveguide are connected with the first transmission optical fiber and the second transmission optical fiber respectively, the two ends of the second straight optical waveguide are connected with the third transmission optical fiber and the fourth transmission optical fiber respectively, and the first straight optical waveguide is provided with a first Bragg grating. A second Bragg grating and a third Bragg grating are separately arranged on the second straight optical waveguide, a miniature air groove is formed in the upper surface of the optical waveguide substrate, and the miniature air groove is located between the second Bragg grating and the third Bragg grating. The temperature-sound time-space synchronous in-situ measurement is realized, and the measurement precision is improved.