108 results about "Mode excitation" patented technology

A chip package includes a plurality of layers including conductive planes connected by vias. The layers include a first portion having an antenna formed therein and a parallel-plate mode suppression mechanism to suppress parallel-plate mode excitation of the antenna. The parallel-plate mode suppression mechanism includes a reflector offset from an antenna ground plane and first grounded vias. A second portion has an interface for connecting to an integrated circuit device wherein the first portion and the second portion are separated by the parallel-plate mode suppression mechanism.

A time varying electrical excitation(s) is applied to a system containing biologic and/or non-biologic elements, whereupon the time-varying electrochemical or electrical response is detected and analyzed. For biologic specimens, the presence, activity, concentration or relative quantity, and certain inherent characteristics of certain target substances (hereinafter referred to as “target analytes”) within, or comprising, the specimen of interest may be determined by measuring either the current response induced by a voltage-mode excitation, or the voltage response induced by a current-mode excitation. Labeling or marker techniques may be employed, whereby electrochemically active auxiliary molecules are attached to the substance to be analyzed, in order to facilitate or enhance the electrochemical or electrical response. The method may also be employed to test non-biologic systems comprising an electrochemical cell or a battery of cells, wherein complex pulse type excitation signals are applied to the cell and the resultant time varying polarization voltage information is extracted and analyzed to determine at least one characteristic of the cell(s) condition or state.

A system and method for using reluctance torque or a combination of both reluctance and reaction torque components of an attached synchronous machine (102) to accelerate a prime mover (116), such as a gas turbine engine, within a desired start time. The system selects a mode of starting operation, and thereafter applies reluctance torque through a synchronous machine (102) armature winding (102A) excitation as a single, sufficient starting force in a first mode, or staged reluctance and reaction torque through the additional excitation of the synchronous machine (102) field winding (102B) excitation in a second mode, using existing power electronics and controls.

The invention provides a dual-mode microwave filter, comprising a rectangular resonator of length l, height b, and width a operating in two distinct modes (m, 0, n) and (p, 0, q) from a single family of modes and presenting the same direction as the E field, and wherein coupling and mode excitation discontinuities are inductive and in the same direction.

Vibrational energy harvesting (VEH) structures that include resonant beams each having a fundamental resonance frequency and a parametric mode frequency and including at least one piezoelectric layer for generating electrical charge in response to each of fundamental-resonance excitation and parametric-mode excitation of that beam. Circuitry is provided for harvesting the electrical charge from the resonant beam. In some embodiments, the parametric mode frequency of the beam is tuned to be close to its fundamental resonance frequency so as to increase the effective bandwidth of a VEH structure. The effective bandwidth of a VEH structure can be further increased by tuning ones of multiple parametric-mode-enabled resonant beams to slightly different fundamental resonance frequencies and parametric mode frequencies.

There is provided a transition mode device and method for use in a predictive-type sound signal codec for producing a transition mode excitation replacing an adaptive codebook excitation in a transition frame and/or a frame following the transition in the sound signal, comprising an input for receiving a codebook index and a transition mode codebook for generating a set of codevectors independent from past excitation. The transition mode codebook is responsive to the index for generating, in the transition frame and/or frame following the transition, one of the codevectors of the set corresponding to the transition mode excitation. There is also provided an encoding device and method and a decoding device and method using the above described transition mode device and method.

The invention provides a magnetorheological fluid flexible support method for a thin-wall slab, which belongs to the technical field of clamping of thin-wall parts, and relates to the magnetorheological fluid flexible support method for a thin-wall slab. The method comprises firstly clamping the thin-wall slab on an array type controllable excitation clamp, and reliably sealing the thin-wall slab; then vacuumizing to construct a vacuum negative pressure environment between the thin-wall slab and the clamp body, and under set external pressure, performing automatic filling of magnetorheological fluid; and finally, by array type excitation units of which the location coding is controlled by a multi-way switch, performing excitation phase change of the magnetorheological fluid and finishing curing support of an excitation region. In the method, the magnetorheological fluid works in an extrusion mode in an excitation manner, an elasticity modulus is higher, and support rigidity is ensured; a magnetic field control module is formed by the array type excitation units, and by the location coding on the excitation units, multi-mode excitation requirements on units, partitions and the integrity can be realized; and flexible clamping of the thin-wall slab can be realized.

The invention relates to a high-pressure-intensity external pulse excitation device for a T-shaped burner. In a burning chamber of the pulse excitation device, an ignition head is utilized for igniting the set amount of black powder, so that fuel gas at the required pressure intensity and temperature can be generated (the pressure intensity needs to be higher than the balanced pressure intensity in the T-shaped burner), a sealing plug is propped open, and the black powder enters the T-shaped burner through a pulse device spray opening, so the required pressure intensity disturbance (i.e. pulse) is formed. Under the general conditions, the pulse device can input gas-particle mixtures completely identical to the burning products generated by the T-shaped burner charged with the powder, and in addition, the fundamental frequency oscillation mode excitation can be ensured.

The invention discloses a dual-polarized built-in slot antenna used for a mobile terminal of a wireless local area network, which belongs to the field of antenna design and is characterized in that: a coplanar waveguide feed structure on the facade of a printed circuit board can simultaneously support an odd symmetric feed mode and an even symmetric feed mode to excite a horizontal polarization mode and a vertical polarization mode of the slot antenna inside the facade metal of the printed circuit board respectively so as to realize two orthogonal polarization modes in the same radiation unit, and meanwhile is excited by two orthogonal transmission modes of the same feed structure. The dual-polarized internal slot antenna has the advantages of miniaturization, broad band, compact structure and high isolation, and is suitable for the antenna of a multi-input multi-output system of a miniaturized mobile terminal on behalf of wireless local area network services.

A solenoid-operated valve actuating controller actuates a solenoid-operated valve by energizing an actuating coil of the solenoid-operated valve in a rated mode, enough to move a movable member in the actuating coil, during a first period. Further, the actuating coil is energized in a power saving mode, during a second period after the first period. The solenoid-operated valve actuating controller has a timer circuit for setting the first period, an oscillating circuit for energizing the actuating coil in the power saving mode during the second period, and a control circuit for stopping an oscillating operation of the oscillating circuit during the first period based on an output signal from the timer circuit, and for energizing the actuating coil in the rated mode.

This invention relates to optical fiber systems where light is launched into and propagated in the fundamental mode of graded-index multimode fiber. Generally, it is not possible to launch light exclusively into the fundamental mode of graded-index multimode fiber by butt-coupling the multimode fiber to an arbitrary fiber carrying light from a source; several other modes may be launched. By inserting a length of a special singlemode fiber between an arbitrary fiber carrying light from a source and the graded-index multimode fiber, light can be launched exclusively into the fundamental mode of the graded-index multimode fiber. The special singlemode fiber has a modal pattern that matches the fundamental Gaussian modal pattern of the graded-index multimode fiber, which permits launching of the light into only the fundamental mode of the multi mode fiber. Several applications for propagation in the fundamental mode of graded-index multimode fiber arises. These include: fiber optic sensor systems, high data rate communication links, low modal noise links, high security links, etc.

A method and apparatus is disclosed that measures the flow through a conduit (702) by measuring the Coriolis coupling between two vibration modes in the conduit. The conduit is first excited at two different vibration modes at two different frequencies (704). The coupling between the two modes is determined by forcing the phases of the two modes at the off mode frequency to be zero (708). The flow through the conduit can then be determined using the magnitude of the forces required to drive the phases of the two modes at the off mode frequency to zero (710).

The invention relates to a mode exciter from a rectangular waveguide TE<10> mode to a round waveguide TE<21> mode and a design method. The work wavelength of the mode exciter is Lambda, and comprises rectangular waveguide and round waveguide; the rectangular waveguide comprises an input port and an output port; the round waveguide comprises a short circuit surface and an output port; the output port end of the rectangular waveguide is tipsily embedded into the round waveguide in a position with the distance being 1/4 work wavelength away from the short circuit surface, so that electromagnetic waves are transmitted to the output port of the round waveguide from the input port of the rectangular waveguide; the mode excitation on the round waveguide can be realized; the narrow edge of the rectangular waveguide is vertical to the axial line of the round waveguide; the center line of the rectangular waveguide and the axial line of the round waveguide form an included angle being theta; the length of the rectangular waveguide is 1 to 2 times of the work wavelength; and the length of the round waveguide is 5 to 7 times of the work wavelength. The mode exciter provided by the invention has the advantages that the structure is simple; and the work frequency band and the mode conversion efficiency can meet the requirement of the propagation characteristic measurement of the TE<21> mode in a gyro traveling wave tube high-frequency system.

An apparatus and method for compensating actuator arm oscillation induced by resonance mode excitation during a seek in a disc drive data handling system. The actuator arm supports a head adjacent a recording surface, and a servo loop controls the position of the actuator arm. A frequency of actuator arm oscillation is identified, after which a seek is initiated to move the head from an initial track to a destination track on the recording surface. A position error signal (PES) is generated to indicate position of the head relative to the destination track, and a compensation signal is generated by a filter based on the PES and the frequency of oscillation of the actuator arm. The compensation signal is adapted to remove a component of the PES arising from the actuator arm oscillation, and is applied to the servo loop as the head is settled onto the destination track.

The invention provides an integrated probe type microsphere cavity sensor, comprising an integrated input optical fiber, a microsphere cavity and an integrated output optical fiber. The sensor is characterized in that the sphere shaped microsphere cavity is integrated with the integrated input optical fiber and the integrated output optical fiber into a whole; the microsphere cavity is used as an optical transmission vector and an external parameter probe; the integrated input optical fiber is used as an optical signal input end; the integrated output optical fiber is used as an optical signal output end; and the microsphere cavity sensor is a sensor integrating laser input, optical coupling, optical transmission and optical detection. The integrated probe type microsphere cavity sensor overcomes the defect that the traditional micro-cavity performs optical mode excitation and structure separation depending on a conical optical fiber, has the advantages of simple structure, optical integrated coupling, high reliability, small volume, light weight, abrasion resistance, high accuracy, low cost, low power consumption and high electromagnetic interference resistance, and can be used in the fields of gas density measurement, liquid concentration measurement, bio-protein cell detection and the like.

This invention relates to one rectangle wave guide mode and round wave guide mode conversion high frequency circuit structure, wherein, its rectangle wave guide and co-axis resonance chamber is connected by cross; the co-axis resonance chamber inner wall is connected to the round wave guide through the couple holes with other end connected to the round wave guide for work mode of TE0n; the rectangle wave guide mode TE10 mode excitation co-axis resonance chamber mode.

An effective and precise method and system for compensation and measurement of a zero-bias in an axisymmetrical CVG (Coriolis Vibrating Gyroscope) is provided. Principal mode is driven according to an X-axis. Angular velocity is measured through Coriolis mode excitation along Y-axis. The sensitive axis of the gyroscope is reversed by 180 degrees by switching input and sense signals. Vibration is then driven along Y-axis and angular velocity is sensed along X-axis. On each position, after an arbitrary period of time, the gyroscope output is stored. Half-difference in outputs between two opposite position gives angular velocity and zero-bias effect is canceled. Half-sum in outputs between two opposite position gives the zero-bias error.

The invention discloses an antenna laying-out method used for increasing an isolation degree of same-platform antennas, and belongs to the field of system-level electromagnetic-compatibility design. According to the method, it is assumed that N to-be-laid-out antennas exist on a certain platform, MATLAB is utilized for writing a character-module calculation program, an impedance matrix [Z] generated by a CAD model of the platform in FEKO is read, mode currents are obtained, then excitation coefficients of platform modes are calculated according to an antenna excitation field, and antenna laying-out is completed through excitation coefficient distribution. Compared with currently-popular modern optimization algorithms, the method does not need setting of an optimization target or an optimization function, and can increase the isolation degree and determine optimal antenna positions simply through the mode excitation coefficients of character modules of the platform. Problems that optimization laying-out of multiple airborne antennas is low in efficiency, not good in effects and liable to not converge are solved.