46results about How to "Achieving the purpose of miniaturization" patented technology

The invention discloses a dual-frequency receiving antenna and a dual-frequency rectifying antenna. The dual-frequency receiving antenna and the dual-frequency rectifying antenna are used for solving the problems that an existing dual-frequency receiving antenna is large in size and small in gain, an existing dual-frequency rectifying antenna is large in size, can not receive weak energy and is not suitable for remote transmission, and a rectifying circuit is poor in reliability. The dual-frequency receiving antenna comprises a rectangular radiating patch. A Z-type groove used for achieving dual-frequency characteristics is formed in the radiation patch. The lower end of the radiation patch is sequentially connected with a dielectric substrate layer and a metal earth plate through a coaxial line. The coaxial line is in circuit connection with the rear end of the radiation patch. An air dielectric layer is formed between the radiation patch and the dielectric substrate layer. The portions, arranged between the radiation patch and the dielectric substrate layer, outside the coaxial line are provided with metal sheets in a bilaterally-symmetric mode. The upper ends of the metal sheets are connected with the radiation patch. The lower ends of the metal sheets are connected with the dielectric substrate layer. One end face of the radiation patch is further connected with the metal sheets connected with the dielectric substrate layer. The dual-frequency receiving antenna and the dual-frequency rectifying antenna can be widely applied in the fields of communication, medical treatment, industry and the like, for microwave power transmission.

The invention provides an electrochemical gas sensor. The sensor comprises an upper cover, an electrode group, a platy main body shell and a rear cover, wherein the upper cover and the main body shell are buckled to form a cavity; the electrode group is formed by superposing a working electrode, first glass wool, a reference electrode, second glass wool and an auxiliary electrode in turn; the upper cover comprises a gas inlet through hole and a gas diffusion groove; the gas diffusion groove is formed at the bottom of the upper cover; the gas inlet through hole passes through the upper cover and is communicated with the gas diffusion groove; the main body shell comprises an electrolytic cell groove which is formed on the top of the main body shell, and a liquid injection through hole which passes through the main body shell and is communicated with the electrolytic cell groove; and the rear cover is arranged in the liquid injection through hole. The problem that the microminiaturization development of related monitoring devices is limited to a certain extent because the external dimension of the electrochemical gas sensor is large in the prior art is solved, and the aim of microminiaturizing the electrochemical gas sensor is fulfilled.

The invention provides a miniaturized high-efficiency UHF (Ultra High Frequency) low-profile broadband antenna adopting an SPP structure, which is applied to the technical field of communication. Theminiaturized high-efficiency UHF low-profile broadband antenna comprises a coplanar waveguide structure, an SPP transmission line structure, an antenna radiation structure, an impedance matching structure and an SMA joint, and is characterized in that the antenna forms transmits from a coplanar waveguide form to an SPP mode; the impedance matching structure is arranged at the tail end so as to reduce the reactance of a low frequency band; the coplanar waveguide structure, the SPP transmission line structure, the antenna radiation structure and the impedance matching structure are arranged on adielectric plate structure of the antenna; and radio frequency excitation is performed on the antenna by adopting an SMA joint side feeding mode in antenna feeding. The miniaturized high-efficiency UHF low-profile broadband antenna solves a problem of low gain in the existing U-band antenna applications.

The invention provides a flexible circuit connection device, and relates to the field of signal transmission of electronic systems. The flexible circuit connection device comprises a flexible connection device and rigid printed boards, wherein the rigid printed boards are fixedly arranged at two ends of the flexible connection device; two ends of the flexible connection device penetrate into the rigid printed boards along the axial direction respectively; the rigid printed board at one end is fixed on the bottom surface of an external connector in parallel; and a structure gasket is fixed on the connected part of the rigid printed board at the other end and the flexible connection device, so that the condition that the rigid printed boards are kept in a horizontal state along the bottom surface of the structure gasket is achieved. According to the flexible circuit connection device, the impedance matching and continuity are better; the high-speed signal transmission performance is more excellent; various performance indexes meet the design requirements; meanwhile, a lot of equipment space and weight occupation is reduced; the reliability risk caused by a cable interconnection mode is greatly avoided; and the reliability of the system is improved.

The invention discloses a preparation method of a pipe cap used for 5G communication high-speed laser TO packaging. The preparation method comprises the following steps: assembling a metal pipe shell, C-Lens and a glass-ceramic welding ring onto a fixture, putting the fixture in an atmosphere sintering furnace, and carrying out AR film coating on the inner and outer side parts of C-Lens to obtain the finished product. By designing a special laser packaging pipe cap, a laser collimator C-Lens is welded through air impermeability, the preparation method of the pipe cap serving as a special structure for laser TO56 packaging by replacing an aspherical lens is used for double-chip laser TO packaging, and the bandwidth of 40 GHz can be reached, so that the cost is greatly reduced, the purpose of miniaturization is realized, compatibility with existing optical device standard is realized, and the popularization speed of 5G network of high-speed optical devices is effectively increased. Without changing current packaging technology and equipment, the output of 40 GHz optical signals is realized through single TO packaging.

The invention discloses an excited vibration acoustic generator device. The device comprises a voice coil, a magnetic circuit device, an upper shell, a middle shell, a lower shell, an amplifier integration device, a magnetic circuit fixing piece and an elastic supporting body, wherein the lower shell is connected with the middle shell; the amplifier integration device is arranged in the middle shell and comprises a circuit board, a signal input interface, a signal amplifier and a potentiometer; the signal output end of the amplifier integration device is electrically connected with the signal input end of the voice coil; the upper shell is positioned above the middle shell and is connected with a regulating handle of the potentiometer; the magnetic circuit fixing piece is arranged below the circuit board; the magnetic circuit device is arranged below the magnetic circuit fixing piece; and the elastic supporting body comprises a disc spider which is connected with the lower shell and a transmission part which is arranged below the disc spider and stretches out of a through hole of the lower shell. In the scheme, a balance weight body consists of the upper shell, the middle shell, the lower shell, the amplifier integration device, the magnetic circuit fixing piece and the magnetic circuit device, so that the aim of miniaturization of a product can be fulfilled, and the product has high performance.

The invention belongs to the technical field of liquid characteristic detection, and discloses a liquid dielectric constant sensor based on a miniaturized dielectric resonator antenna and an application, wherein a micro cavity is introduced at the top of the dielectric resonator, and a shorting pin is introduced in the middle of the dielectric resonator; the feed structure is a feed probe on one side of the resonator; the feed probe is located on one side of the dielectric resonator and is in close contact with the side of the dielectric resonator; the shorting pin introduced in the middle ofthe dielectric resonator is connected to the floor; and the dielectric resonator and feed structure are on the same side of the floor. The liquid dielectric constant sensor provided by the invention has the characteristics of small volume, simple structure and high sensitivity, and has broad application prospects in the field of liquid sensors. By introducing the shorting pin in the middle of thecylindrical dielectric resonator antenna, the fundamental mode thereof is changed from HEM11delta mode into TM10delta mode. Moreover, the TM10delta mode is also greatly reduced compared to conventional cylindrical dielectric resonator antennas.

The present invention discloses an upspring type flash mechanism. It mainly includes a supporting seat, flash self-body mounted on the supporting seat, first torsion spring which is mounted on the supporting seat and can be used for providing an upwards spring force and a drive device placed close to flash self-body. Besides, said invention also provides its working principle.

The invention discloses a C-ring defect ground structure-based LTCC miniaturized power gain equalizer, which comprises a first metal layer, a first dielectric layer, a second metal layer, a second dielectric layer and a third metal layer, wherein the above layers are sequentially stacked from top to bottom. The first dielectric layer is symmetrically provided with two metallized through holes. The second metal layer comprises a first impedance resonator microstrip, a second impedance resonator microstrip, a first resistor and a second resistor, wherein the first resistor, the first metallized through hole and the first impedance resonator microstrip form a series structure. The second resistor, the second metallized through hole and the second impedance resonator microstrip form a series structure. The third metal layer is symmetrically provided with a first C-ring defect ground groove and a second C-ring defect ground groove. The power gain equalizer is small in size, large in balance amount and small in insertion loss. Therefore, the power gain equalizer is suitable for adjusting the gain flatness of a high-power source that is working within a microwave frequency band.

A miniature multi-channel waveguide switch comprises an electromagnetic system and a guide system, wherein a guide rotor in the guide system adopts a mode of combining uniform bent waveguide paths and a non-uniform straight waveguide path, so that the path width is reduced, the switch sizeis greatly reduced, and the purpose of the miniature switch is achieved. Further, a non-uniform straight waveguide structure adopts a gradually-changing compensation method, the parameter deterioration brought by discontinuity is reduced, compensation is achieved by optimizing an axial choke groove, a circumferential choke groove and a polarization choke groove, and the stability of microwave performance is ensured.

The invention relates to an antenna miniaturizing technology, in particular to a miniaturized antenna based on capacitive loading. The miniaturized antenna comprises a feed coaxial line, a metal drum, a grounding plate and a metal disk, wherein the metal drum and the grounding plate are arranged in parallel; the metal drum is positioned on the grounding plate; the metal disk is arranged between the metal drum and the grounding plate in parallel; the feed coaxial line passes through the metal disk, and is connected between the metal drum and the grounding plate respectively; and insulated bracket supports are arranged between the metal drum and the metal disk as well as between the metal disk and the grounding plate respectively. Through adoption of the miniaturized antenna, the inconvenience in use caused by overlarge size of an antenna is avoided; miniaturization of the antenna is realized effectively under the condition of not reducing the working bandwidth; and meanwhile, the design is simple and convenient. The antenna is an omnidirectional antenna, has maximum radiation in a horizontal direction, and can keep high efficiency of 70 to 86 percent in a working frequency band. The antenna is 40cm in full height which is about a half of the size of a conventional antenna, and the aim of miniaturizing the antenna is fulfilled.

A variable area ratio ejector based on an electronic expansion valve comprises an electric adjusting device, an inlet segment, a nozzle, a suction chamber, a mixing chamber and a diffusion segment. The electric adjusting device comprises a valve seat, a thread transmission mechanism, a rotor, a coil and a needle valve. The needle valve penetrates through the inlet segment to extend to the nozzle. The nozzle, the suction chamber and the mixing chamber are connected sequentially. The needle valve is arranged in the inlet segment. A valve rod is connected with the rotor. The coil is arranged outside the rotor. The needle valve extends to the inlet segment so as to adjust the cross section area of a nozzle throat and change the area ratio of the ejector. According to a specific operation process in a refrigeration system, when the adjusting device is closed completely, the needle valve is completely attached to the nozzle, and the flow quantity of primary flow is zero; and when the adjusting device is opened completely, the needle valve gets away from the nozzle completely, and the flow quantity of the primary flow is maximum. Adjustment of the flow quantity under the variable working condition is achieved through the adjusting device of the electronic expansion valve, throttling loss in the refrigeration can be fully recycled, and energy waste is reduced. The characteristic of the small size of the electronic expansion valve is utilized, implementation is easy, and installation is convenient.

The invention provides a broadband monopole cellphone antenna which comprises a metal ground, a dielectric plate arranged above the metal ground and a metal antenna piece attached on the surface of the dielectric plate. The metal antenna piece comprises a first radiation unit, a second radiation unit, a connecting portion connecting the first radiation unit with the second radiation unit, and a feeder line electrically connecting the first radiation unit with the metal ground, the connecting portion extends along a long side of the dielectric plate, the first radiation unit and the second radiation unit are connected with one end of the connecting portion respectively and face the other end of the connecting portion to be arranged on the upper surface of the dielectric plate in a manner of serving as multiple folding units, and unfolding length of the first radiation unit is smaller than that of the second radiation unit. The broadband monopole cellphone antenna adopts a folding monopole antenna form, so that occupied area of the antenna is greatly reduced; wide bandwidth is provided, and all frequency bands used in current cellphone communication can be covered.

The invention relates to a radio frequency module integration technology applied to mobile equipment, and discloses an on-chip CMOS power amplifier with a temperature compensation function. The power amplifier comprises a multi-path band-gap reference current source, a first-stage amplifying circuit, a second-stage amplifying circuit, a third-stage amplifying circuit, a first biasing circuit, a second biasing circuit and a third biasing circuit; the multi-channel band-gap reference current source provides current for the three bias circuits, the radio frequency signal input total port is connected with the input end of the first-stage amplification circuit, the output end of the first-stage amplification circuit is connected with the input end of the second-stage amplification circuit, the output end of the second-stage amplification circuit is connected with the input end of the third-stage amplification circuit, and the output end of the third-stage amplification circuit is connected with the radio frequency signal output total port. A three-stage amplification circuit structure is adopted, gain fluctuation and output power fluctuation in high and low temperature states are compensated, and the requirements of a system can be well met.

The invention discloses a photomultiplier tube assembly, an analysis device and an optical calibration method thereof. The photomultiplier tube assembly comprises a photomultiplier tube body, a reference device and an electric signal acquisition device, the reference device comprises a reference light source, a photoelectric detector and a light guide part, and the reference light source and the photoelectric detector are arranged at an interval; the light guide part is provided with an input end, a first output end and a second output end, the input end is connected with the reference light source, the first output end is connected with the photoelectric detector, and the second output end corresponds to the photomultiplier tube body; and the photomultiplier tube body and the photoelectric detector are electrically connected with the electric signal acquisition device respectively. According to the photomultiplier tube assembly, the reference module and the photomultiplier tube body are integrated, the reference module and the photomultiplier tube body can be installed in an analysis device together, the photomultiplier tube assembly does not need to be detached from the analysis device for detection and calibration, and detection and calibration can be completed through the photomultiplier tube assembly.

The invention relates to a near field communication and two-dimensional code compatible device and method. The device comprises a two-dimensional code recognition module used for scanning a two-dimensional code so as to obtain two-dimensional code information; a near-field identification module used for performing near-field communication with a target object to obtain near-field information; a distance sensor used for detecting the distance of the target object; and a processor used for starting the near-field identification module to obtain the near-field information when the distance detected by the distance sensor is smaller than a distance preset value. The near field identification module is started only when the distance of the detected target object is smaller than the distance preset value. Therefore, the two-dimensional code scanning process is prevented from being interfered by starting the near-field recognition module at a relatively long distance, so that the two-dimensional code reading head of the two-dimensional code recognition module and the card swiping reading head of the near-field recognition module can be arranged in a relatively short distance range, and the purpose of miniaturization of the device is achieved.

The invention discloses a method for preventing the misoperation of an RCCB (residual current circuit-breaker). The method comprises the steps: obtaining the ratio K of an actual current in a line toa rated current of the RCCB in real time, and carrying out the real-time adjustment of a residual current operation value when the ratio K is greater than or equal to one: determining that the residual current operation value is greater when K is greater when K is not less than one and is less than Kmax, and the residual current operation value is less than a maximum residual current operation value allowed by the RCCB; determining that the residual current operation value is the maximum residual current operation value allowed by the RCCB when K is not less than Kmax, wherein Kmax is a presetvalue greater than one. The invention also discloses the RCCB. The method prevents the misoperation, caused by the overloading, of the RCCB in a software mode, and does not need to increase the volume of an iron core in a mutual inductor while effectively improving the safety and reliability of the RCCB.