30results about How to "Wide range of bandwidth" patented technology

On the basis of defining the concept of a spacecraft solar panel conformal antenna, the invention discloses S1, a spacecraft solar panel conformal antenna structure; S2, a spacecraft solar panel conformal antenna array structure; S3, a spacecraft solar panel conformal antenna array feeding mode; S4, a spacecraft solar panel conformal antenna beam control network; S5, a spacecraft solar panel conformal antenna microwave signal transmission line; S6, a connecting method of the spacecraft solar panel conformal antenna and a spacecraft. The spacecraft solar panel conformal antenna has the advantages of reducing the spacecraft launching cost, prolonging the in-orbit service life of the spacecraft, reducing the fairing requirement, facilitating appearance attractiveness of the spacecraft, improving spacecraft maneuverability and safety, and being high in replicability and good in expandability. Multiple solar panel conformal antennas with different orbit heights and types can be applied through networking, and cover with a bigger bandwidth range and a wider spatial range can be achieved through mission planning. Besides, the conformal antenna thought can be expanded to the field of interstellar probe antennas. The spacecraft solar panel conformal antenna has a wide application prospect.

The invention relates to a wireless parallel transmission method for an energy and signal shared channel and belongs to the field of radio energy transmission. The wireless parallel transmission method is used for solving the problem that the implementation of synchronous transmission of wireless energy and information needs two channels. According to the wireless parallel transmission method for the energy and signal shared channel, provided by the invention, a system primary side circuit and a system secondary side circuit adopt a pair of coils as a shared channel and achieve the parallel synchronous transmission of the information and the energy by adopting the same frequency; the system primary side circuit achieves the forward transmission of the information in a variable frequency manner, and the system secondary side circuit achieves the reverse transmission of the information in a controllable rectifying manner. The method is applied to wireless radio energy transmission.

A wireless energy double-frequency receiving device based on microwave transmission consists of a receiving antenna and a rectification circuit. The receiving antenna adopts a double-sided ground micro-strip line structure and is realized through a three-layer metal universal printed circuit board (PCB). The PCB is provided with five layers, wherein the first layer, the third layer and the fifth layer of the PCB are made of a copper material, the third layer is used as a ground wire, both the first layer and the second layer are used as the antenna and used for receiving electromagnetic waves of different frequency bands, and the radius and clearance of the two layers are different. The device can simultaneously receive the signal of a wave band s of 2.5 to 4GHz and a wave band c of 4 to 8GHz. Compared with other energy transmission systems, the wireless energy double-frequency receiving device has advantages of miniaturization, wide frequency band, high efficiency and the like.

The invention discloses a mine earthquake monitoring method based on fiber gratings. At least thirty coal sample test blocks are randomly selected from underground to-be-monitored area coal bodies, and change conditions of resonance wavelengths of the fiber gratings are obtained; multiple monitoring points are selected around the to-be-monitored area coal bodies to enable the monitoring points to surround a to-be-monitored area, multiple fiber grating sensors transmit real-time fiber grating resonance wavelength signals to an underground monitoring sub station through multi-core communication cables; the underground monitoring sub station transfers optical signals to a ground receiver; the change conditions of the resonance wavelengths of the fiber gratings of each monitoring point are obtained from the processed signals through a data processing computer; and a real-time comparison between change of the resonance wavelengths of the fiber gratings, monitored in real time and change rules of the resonance wavelengths of the fiber gratings, obtained through tests until comparison consistency occurs, and it is indicated that the coal bodies have the risk of mine earthquakes. The method provided by the invention is high in accuracy and good in real-time performance.

The invention discloses a ring-type bridge pile foundation scour monitoring system and a monitoring method thereof. The ring-type bridge pile foundation scour monitoring system comprises a bridge pilefoundation, a carrying device, sensors and a data processing system; a group of linear tracks are arranged in the circumferential direction along the exterior wall surface of the bridge pile foundation; the carrying device is matched with the linear tracks in a sliding manner; the carrying device comprises a carrying round ring and a group of trundles arranged on the carrying round ring; the sensors are arranged on the surface of the carrying round ring and the bridge pile foundation; and the data processing system is fixed at the top part of the bridge pile foundation and connected with thesensors through conductors for receiving data in the sensors. The invention has the beneficial effect that the ring-type bridge pile foundation scour monitoring system and the monitoring method thereof are applicable for the installation of the bridge pile foundation scour monitoring system and the real-time monitoring to pile foundation scour when in construction.

The invention discloses an electromagnetic band gap structure for achieving ultra-wideband suppression of synchronous switching noise. The electromagnetic band gap structure is characterized in that arectangular notch is etched on each side of a power plane, and a microstrip line is led out from the middle point of the bottom of the notch; the microstrip line surrounds the power plane to the tailend of the next side in a counterclockwise direction, and the part of the microstrip line positioned at the next side surrounds the part of the microstrip line positioned at the side, which is led out from the rectangular notch at the side; the microstrip line is connected with the microstrip line of the adjacent structural unit to form an S shape; the central area of the power plane is hollow, and a square plane plate is inlaid in the central area; a rectangular notch is etched in the center of each of four sides of the square plane plate, and a microstrip line is led out from the middle point of the bottom of the rectangular notch and connected with the power plane. The electromagnetic band gap structure better reduces the lower cut-off frequency of noise suppression and effectively enlarges the bandwidth range of noise suppression, thereby achieving the ultra-wideband suppression of the synchronous switching noise between the power plane and a ground plane.

The invention discloses a novel electromagnetic band gap structure for suppressing synchronous switch noise. The electromagnetic band gap structure is etched on a power plane; all unit structures areconnected through S-shaped micro-strip lines; and an L-shaped micro-strip line is arranged in each unit structure. According to an S-shaped bridge structure, the inductance of a bridge structure of the electromagnetic band gap structure is increased, so that the lower cut-off frequency of noise suppression is reduced; and the S-shaped bridge structure can suppress the SSN in a stop band range to ensure that the noise cannot be transmitted to outside, so that the bandwidth range of the noise suppression is effectively expanded, and the ultra-wideband suppression of the SSN between the power plane and a ground plane is achieved. When the suppression depth is -40dB, the suppression bandwidth ranges from 0.26GHz to 25GHz.

The invention provides the multi-channel high-bandwidth wireless force sensor for intelligent processing. The multi-channel high-bandwidth wireless force sensor comprises a plurality of resistance strain gauges uniformly distributed on the circumference of a rotating shaft of a tool to detect low-frequency static force signals in the rotating process; a plurality of piezoelectric films which are uniformly distributed on the same circumference, and are deviated from the resistance strain gauges for a preset distance to detect high-frequency dynamic force signals in the rotating process; a signal acquisition module which is connected with the resistance strain gauges and the piezoelectric films respectively, and carries out decoupling calculation on the low-frequency force signals and the high-frequency force signal to obtain force measurement data; and a wireless data transmission module which is connected with the signal acquisition module and transmits the obtained force measurement data to the outside. According to the multi-channel high-bandwidth wireless force sensor, the bandwidth range is large, the stress of a rotary cutter can be measured, and damage due to imbalance cannotbe caused.

The invention discloses a method for realizing image data transmission based on power line high-speed carrier HPLC. The method comprises the following steps: firstly, an image acquisition module uploads an event notification to a corresponding concentrator after detecting an abnormal signal; then, the concentrator starts to read the image file and sends a file request signal to the active sensingmodule; then, the image acquisition module sends an acquired image data packet to the active sensing module according to a request command of the concentrator, then, the concentrator receives the image data packet, caches the image data and returns to continue requesting a subsequent image file until the image file is received completely, and finally, the concentrator starts and reports the imagefile to the main station. According to the invention, an electricity inspector can remotely check the operation condition of the website meter box, the advantages of large HPLC communication bandwidthrange, weak noise and the like are utilized, the range suitable for the terminal module is expanded, and the accuracy of image data transmission is ensured.

The invention discloses a method for broadening the bandwidth of a waveguide slot non-resonant array antenna. The method mainly solves the problem that an existing waveguide slot non-resonant array antenna is narrow in working band. The implementation scheme is as follows: selecting two working frequency points fr1 and fr2 of which the frequencies are staggered from each other in the working frequency band of the antenna; changing an array element of the waveguide slot non-resonant array antenna from an existing single slot into double slots of which the resonant frequencies are fr1 and fr2 respectively, namely, two sets of crack arrays with different resonant frequencies are designed on the same waveguide aperture surface according to a known waveguide crack array antenna design method and formula to broaden the bandwidth of the antenna, and a distance fd is arranged between array elements of the two sets of crack arrays, so that the two sets of crack arrays do not interfere with eachother. The bandwidth of the waveguide slot non-resonant array antenna can be effectively broadened, and the method can be used for designing the waveguide slot non-resonant array antenna.

The invention relates to a controllable gain amplifier, which is characterized by comprising a single-chip microcomputer module, a power supply module, a keyboard module, a display module, a gain amplification module, a key module and a DIP switch module. The single-chip microcomputer module is connected with the gain amplification module, the power supply module, the keyboard module and the display module. And the gain amplification module is also connected with the key module and the DIP switch module respectively. According to the gain amplifier, different gain modes can be adjusted according to actual conditions.

The invention discloses a low-polarization sensitivity color separation sheet with a wide spectrum from ultraviolet to short wave infrared. The color separation sheet uses quartz as a substrate, a film system uses Nb2O5 and Ta2O5 as high-refractivity materials and uses SiO2 as a low-refractivity material. One surface of the quartz substrate is sequentially added with a long-wave pass reflective film I, a reflective film II, a reflective film III and a reflective film IV whose central wavelengths are gradually reduced from near infrared to ultraviolet; a matching layer I is inserted between the reflective film I and the substrate; a matching layer II is added between the reflective film IV and the air; the thicknesses of all high-refractivity film layers are kept unchanged, and the low-refractivity film layer thickness serves as a unique optimization parameter to optimize the initial film system to thus acquire a final color separation film system. The color separation sheet has a wide spectrum coverage range, the polarization sensitivity is low, a near infrared spectrum with a similar band can be effectively separated, and the low-polarization sensitivity color separation sheet with a wide spectrum from ultraviolet to short wave infrared can be used for color separation by a multi-spectrum low-polarization sensitivity space and ocean remote sensing instrument.

The invention discloses a micro-polarization array design model and an array arrangement mode acquisition method based on the micro-polarization array design model, belongs to the field of polarization optical devices, and mainly relates to a polarization optical technology, a focal plane type polarization imaging detection technology, a Fourier frequency domain optical analysis technology and thelike. According to the model, structural design can be carried out on 2*N series and N*N series micro-polarization arrays, the distances and positions among all components in a two-dimensional frequency domain are optimized by changing parameters a, b and c of the design model, and the bandwidth range among the components which is not influenced by crosstalk is increased, so that the reconstruction quality of Stokes parameter images and DoLP images is improved. According to the design model, from the perspective of two-dimensional frequency domain analysis, the design and acquisition steps ofthe micro-polarization array arrangement mode are simplified, the design range of the array arrangement mode is expanded, a theoretical basis is provided for development of a high-performance micro-polarization array, and high-quality Stokes parameter image reconstruction is realized. And the practical application of the focal plane type polarization imaging system is promoted.

The invention provides a 90-degree active bridge with an ultra-broad band. The active bridge comprises a first all-pass filter network composed of 2n-stage cascade all-pass filters and a second all-pass filter network composed of 2n-stage cascade all-pass filters, wherein an angular frequency product of an i stage of the first all-pass filter network and a (2n-i+1) stage of the second all-pass filter network is a definite value, n is a positive integer, and i is in a range from 1 to 2n. According to the 90-degree active bridge with the ultra-broad band, the 90-degree active bridge is used in a broad band range of a baseband signal to perform a stable 90-degree phase shift for signals, the phase error range is less than 1 degree,two channels of signals which are subjected to the phase shift can be subjected to addition, subtraction and gain amplification, the active bridge can be excellently applied to the single side band output of the base band broad band signal close to zero frequency, simultaneously weak signal can be subjected to 100-time gain amplification, besides, the gain amplification is achieved and simultaneously the phase error range is controlled within 2 degrees, and the phase shift characteristic is stable.