46results about How to "Easy frequency adjustment" patented technology

The surface mounting type antenna includes a rectangular parallelepiped base body, a group of radiation electrodes and a feeder terminal. The group of radiation electrodes includes radiation electrodes formed on a first pair of side faces so as to extend from one end face side to another end face side thereof, and a radiation electrode formed on the one end face side of one side face of a second pair of side faces, the radiation electrode being connected to the radiation electrodes formed on the first pair of side faces. The feeder terminal is formed on a part of another side face of the first pair of side faces, the part being in a vicinity of another side face of the second pair of side faces, the feeder terminal being connected to the group of radiation electrodes.

An electromagnetic wave irradiation tool encompasses a narrow tube (endoscope probe) (7) defined by an outside diameter of 0.1 mm-20 mm, having an electromagnetic wave irradiation terminal (3) configured to irradiate an electromagnetic wave (2) having a frequency equal to a characteristic frequency of a microorganism (11) at the top of the narrow tube (7) and an electromagnetic wave generation unit (3) configured to generate the electromagnetic wave (2) and to supply the electromagnetic wave (2) to the electromagnetic wave irradiation terminal (3). The electromagnetic wave irradiation tool drives the microorganism (11) into a resonant vibration state selectively so that the microorganism (11) can be destroyed, without giving damages to biological body (1) for medically treating the disease induced by the microorganism (11).

The invention discloses a digital phase-shift circuit in the technical field of a power system. The digital phase-shift circuit comprises a counting, triggering and frequency dividing unit, a short circuit pulse counting unit and an over-current pulse counting unit. An improved AC power source including the digital phase-shift circuit comprises a main loop and a control loop which is connected with the main loop and transmits a work state and a control command; the main loop comprises an input filter, an AC-DC voltage adjusting circuit, a DC filter, a DC-AC converter and an output filter, allof which are connected sequentially; and the control loop comprises a variable frequency trigger circuit, a man-machine interaction module and the digital phase-shift circuit according to any one of claims 1 to 3. The digital phase-shift circuit, disclosed by the invention, solves the problems of output waveform distortion, small frequency adjustment range, influence to input power source, complex circuit and the like of the conventional voltage adjusting and frequency adjusting power source which adopts a thyristor voltage adjusting circuit.

A present invention relates to a monopole wideband antenna, that is a wall mounted handing type antenna capable of providing easy frequency adjustment and operating at broad frequency band range. Moreover, the monopole wideband antenna of the invention can be applied in various electronic devices, and is advantageous in its low cost and small size since it can be fabricated directly using a means of print formation upon a circuitboard.

The invention relates to the field of aviation tests, particularly relates to an airplane auxiliary fuel tank flutter model, and at least can solve problems of difficult identification for pitch and yaw modal coupling and inconvenient stiffness adjustment existing in a flutter model at present. In the airplane auxiliary fuel tank flutter model provided by the invention, decoupling is carried out on the stiffness of an auxiliary fuel tank model in three directions, thereby being convenient for identifying such three modals as lateral balancing, yawing and pitching in a test. In addition, frequencies of the three modals of lateral balancing, pitching and yawing of the auxiliary fuel tank are simulated respectively through three correspondingly arranged replaceable spring pieces. The frequency of a certain modal of the auxiliary fuel tank can further be adjusted through replacing the spring piece, thereby being convenient for carrying out frequency adjustment in allusion to the auxiliary fuel tank model in the test, and saving the test cost and the test time.

A measuring system for performing over the air power measurements is provided. The measuring system comprises, within a single housing, a detector module, comprising a detector input, a transmitter module, comprising a transmitter output, and an antenna. The detector input and the transmitter output are at least temporarily connected. At least the transmitter output or the detector input are at least temporarily connected to the antenna.

The array-coil includes a plurality of coil units that are each adjusted to receive a magnetic resonance signal from an examinee. Each coil unit includes: a first-coil-element and a second-coil-element of which each is formed of a linear conductor having flexibility with a predetermined length; and a signal detecting unit that is inserted in series between the first-coil-element and the second-coil-element and detects the magnetic resonance signal. One end of each of the first-coil-element and the second-coil-element is connected to the signal detecting unit and the other end thereof is an open end. Adjacent areas are electromagnetically coupled to each other to function by curving and arranging the first-coil-element and the second-coil-element such that at least partial areas on the open end side of the first-coil-element and the open end side of the second-coil-element are adjacent to each other with a predetermined gap therebetween.

The invention discloses a board-level integrated magnetic induction sensor based on a surface acoustic wave resonator, which comprises a high-frequency substrate (7), a surface acoustic wave resonatorchip, a planar magnetic induction coil (71) and multiple metal membrane wires, wherein the surface acoustic wave resonator chip is attached to a chip bonding area at one side of the top surface of the high-frequency substrate (7); the planar magnetic induction coil (71) is etched at the other side of the top surface of the high-frequency substrate (7); the multiple metal membrane wires are etchedon the bottom surface of the high-frequency substrate (7); and the inner end and the outer end of the planar magnetic induction coil (71) are respectively connected with a surface acoustic wave resonator voltage regulation electrode layer and a DC grounding electrode on the high-frequency substrate through the metal membrane wires, a metal through hole, a DC electrode and a bonding lead (9). According to the board-level integrated magnetic induction sensor based on the surface acoustic wave resonator, digital acquisition and processing of the magnetic induction signals can be realized conveniently, and the adjustment is flexible and convenient.

A piezoelectric vibration component that includes a sealed space formed between first and second package members, and a piezoelectric vibrator is bonded to the first package member with first and second conductive adhesive portions. In the piezoelectric vibrator, a first vibration electrode and a first extended electrode are formed on a first surface of a piezoelectric substrate, and a second vibration electrode and a second extended electrode are formed on a second surface of the piezoelectric substrate. At least the second extended electrode provided on the second principal surface has a higher bonding strength with respect to the conductive adhesive than that of the electrodes on the first principal surface. The electrode patterns on the first and second principal surfaces differ from each other so that the first surface and the second surface can be distinguished from each other.

The invention discloses a novel common mode rejection balun structure for a magnetic resonance radio frequency coil. The structure comprises an upper layer structure, a middle layer structure and a lower layer structure, wherein the upper layer is a solenoid formed by winding a coaxial line, the middle layer is a hard printed circuit board, and the lower layer is a double-layer flexible printed circuit board; the double-layer flexible printed circuit board comprises a base material, an upper-layer conductor located on an upper surface of the base material and a lower-layer conductor located on a lower surface of the flexible base material; the upper-layer conductor and the lower-layer conductor are partially overlapped, and the overlapped upper-layer conductor, the overlapped lower-layer conductor and the base material between the upper-layer conductor and the lower-layer conductor form a planar flexible capacitor, shielding layers at two ends of the solenoid are respectively welded on the hard printed circuit board, and are connected in parallel with the planar flexible capacitor sequentially through the copper-clad layer conductor on the hard printed circuit board, the connecting wire conductor and the conductor on the flexible printed circuit board. According to the novel common-mode rejection balun structure for the magnetic resonance radio frequency coil, the size and the weight are obviously smaller than those of an existing common-mode rejection balun, frequency adjustment is very convenient, and the cost is lower.

A resonator, a filter, a duplexer, and a multiplexer are disclosed. In an embodiment a resonator includes a resonant cavity casing having a resonant cavity and an open end, a cover covering the open end and being connected to the resonant cavity casing and a resonance tube located inside the resonant cavity. The resonator further includes a tuning rod disposed inside the resonance tube and a dielectric material located in the resonant cavity, wherein the dielectric material is located in a capacitance area formed between a top of the resonance tube and the cover, wherein the tuning rod is rotatable relative to the dielectric material, and wherein surfaces of the tuning rod and the dielectric material face each other and comprise non-circular structures so that an overlapping of the surfaces is changeable to adjust a frequency when the tuning rod is rotated relative to the dielectric material.

The invention discloses a vibration absorption structure and a vehicle frame therewith for a vehicle. The vibration absorption structure comprises a metal inner pipe, a metal outer pipe and a clump weight, wherein the metal outer pipe is sheathed outside the metal inner pipe, a rubber damping part is arranged between the metal outer pipe and the metal inner pipe, and the clump weight is sheathed on the metal outer pipe. The vibration absorption structure can be fixed on the vehicle frame and is used for absorbing vibration of the vehicle frame so as to improve the NVH (noise, vibration and harshness) performance of the vehicle frame even the whole vehicle, due to the mutual match of the metal inner pipe, the rubber damping part, the metal outer pipe and the clump weight, especially for the combined action of the rubber damping part and the clump weight, the vibration absorption effect is more obvious.

The invention relates to the technical field of passive safety devices, in particular to a steering wheel damping module. The steering wheel damping module comprises an air bag folding assembly, a damping unit and a housing assembly, wherein the damping unit is fixedly arranged below the housing assembly and comprises a gas generator and a damper; the gas generator is arranged in a through hole ofthe damper and is connected with frequency regulators of the damper. Compared with the prior art, the gas generator is used as a balancing weight; the damper and the gas generator are directly connected by the frequency regulators and are jointly subjected to frequency regulation, so that the damping effect is realized, structural design is optimized, and the performance of a product is improvedin a limited space. The steering wheel damping module disclosed by the invention has the advantages of simple structure, good stability and facilitation for frequency regulation; besides, a stepped structure and a sealing structure are added on the damper to realize better protecting performance.