115 results about "High frequency radiation" patented technology

The invention discloses an optical remote sensing satellite high and low frequency relative radiation error correction method and system, and the method comprises the steps: S1, carrying out the systematic high frequency radiation error calibration of a remote sensing image, so as to eliminate stripe noise; s2, performing frequency domain decomposition on the image after high-frequency correction, and separating high and low frequency components; s3, calculating a global statistical moment of the low-frequency component as a correction reference; s4, calculating a local statistical moment of the low-frequency component column by column; s5, calculating an independent correction coefficient for each column according to the global and local statistical moments; s6, correcting the low-frequency component by using the correction coefficient; and S7, recombining the corrected low-frequency component with the original high-frequency component to generate a final image. The method is suitable for improving the quality of the remote sensing image with multiple composite radiation errors, high-frequency stripes and low-frequency brightness gradient can be effectively eliminated, original texture details of ground features are reserved to the maximum extent in the correction process, and the radiation fidelity is guaranteed.

The USB HUB chip comprises at least a first USB transceiver, a second USB transceiver, a data bit insertion unit, a high-speed routing module and a re-synchronization unit before transmitting. Before a serial data valid signal is asserted, inserted data is inserted into serial data and then transmitted to the high-speed routing module, and the data and a clock are re-synchronized before transmitting to complete internal data transmission. According to the invention, a 480 MHz clock does not need to be synchronously transmitted with the serial data, high-frequency radiation is reduced, time sequence mismatching between the serial data and a global clock does not need to be considered, the difficulty of wiring and layout design is reduced, valid serial data bits do not need to be wasted for clock synchronization, internal delay of the HUB is reduced, long-distance wiring or expansion of more USB ports is facilitated.

The invention relates to an S-band high-reliability patch filtering antenna, and belongs to the technical field of filtering antennas. The antenna comprises a metal floor, a bottom dielectric substrate and a top dielectric substrate which are sequentially stacked from bottom to top. Wherein the upper surface of the top dielectric substrate is provided with a coplanar coupling structure and a rectangular driving patch provided with a U-shaped groove, and a broadband and a low-frequency radiation zero point are generated; and a rectangular branch is arranged on the lower surface of the top dielectric substrate to generate a high-frequency radiation zero point. The patch filter antenna further comprises a microstrip line used for coaxial feed, and the microstrip line penetrates through the metal floor and the bottom dielectric substrate and is connected with the rectangular branch on the lower surface of the top dielectric substrate. High reliability is achieved through the double-layer dielectric substrate, structure simplification and low cost are achieved through the plane structure, and the working bandwidth, out-of-band rejection and the rectangular coefficient of the patch filter antenna are improved through reasonable arrangement of the parasitic patches.

The invention relates to the technical field of antennas, in particular to a low-frequency radiation unit and an antenna. The radiation unit comprises a dielectric substrate, a radiation part and a decoupling part, the radiation part and the decoupling part are arranged on the dielectric substrate, and the radiation part and the decoupling part are in coupling connection. The radiation part comprises a feed balun, a first radiation arm group and a second radiation arm group, and the feed balun supports the dielectric substrate and is electrically connected with the first radiation arm group and the second radiation arm group; the polarization direction of the first radiation arm group is perpendicular to the polarization direction of the second radiation arm group. The decoupling part, the first radiation arm group and the second radiation arm group are arranged on the same side of the dielectric substrate, the first radiation arm group and the second radiation arm group are correspondingly provided with decoupling parts, and the decoupling part and the corresponding first radiation arm group or the second radiation arm group are arranged at intervals. The electromagnetic waves of the high-frequency radiation unit generate secondary resonance on the decoupling part, so that the effect of enhancing high-frequency radiation is achieved, and the effect of transmitting the high-frequency electromagnetic waves is equivalently enhanced.

The present application discloses a compact dual - frequency circularly polarized satellite antenna and its array. The antenna includes a dielectric substrate, a feeding element, a high - frequency radiation patch, and a low - frequency radiation patch. The high - frequency radiation patch is disposed on the upper surface of the dielectric substrate, and the feeding element is disposed on the dielectric substrate. The high - frequency radiation patch is fed through the feeding element. There are at least two vertical angles in the high - frequency radiation patch that are distributed at diagonal positions. On the outer sides of the two vertical sides corresponding to any vertical angle of the high - frequency radiation patch, a low - frequency radiation patch is respectively arranged. The two low - frequency radiation patches are respectively parallel to the corresponding vertical sides and are coupled and fed with the high - frequency radiation patch within the upper surface. The present application realizes the setting of a dual - frequency circularly polarized antenna on the same layer, only uses the feeding element to be connected to the high - frequency radiation patch, and enables the high - frequency radiation patch to be coupled and fed with the low - frequency radiation patch, reducing the number of feeding ports required when constructing a dual - frequency circularly polarized antenna and its array.

The invention discloses a laser cutting machine tool security early warning system based on multi-parameter analysis, which relates to the technical field of laser cutting equipment and comprises a front-end sensing layer, a core processing layer and an early warning distribution layer, the front-end differential conditioning circuit is matched with the electric-optical-electric optical fiber transmission link, a high-frequency radiation path of the laser generator and the servo motor is cut off in a physical layer, millisecond-level real-time stripping of dynamic electromagnetic noise is achieved, the problem of weak sensing signal distortion is fundamentally solved, and the detection precision is improved. And meanwhile, the characteristic frequency of the servo motor is stripped in combination with variational mode decomposition, so that the reconstructed monitoring signal has an extremely high signal-to-noise ratio, the crossing from simple early warning to intelligent diagnosis is realized through collaborative analysis of current, vibration and optical data, the risk of mistaken shutdown caused by interference is greatly reduced, the machining continuity is guaranteed, and the working efficiency is improved. And the data transmission delay is greatly reduced, and the security of the equipment is protected to the greatest extent in cooperation with the multi-stage synchronous notification of the early warning distribution layer.

The invention discloses an ultra-wideband miniaturized vertical polarization horizontal omnidirectional radiation antenna, and belongs to the technical field of antenna engineering and wireless communication. The antenna comprises a vertical polarization radiator, a metal top cap, a parasitic metal column, a metal floor and a polarization surface, wherein the vertical polarization radiator is composed of four miniaturized Vivaldi antennas which are placed towards the end-fire direction; the metal top cap and the metal floor are respectively located above and below the radiator, the polarization surface surrounds the periphery of the radiator, and two ends of the parasitic metal column are respectively connected with the metal top cap and the metal floor. The miniature Vivaldi antenna is adopted to form the radiator, so that the problem of distortion of a high-frequency radiation pattern caused by the size of an ultra-wideband antenna is solved; a low-frequency magnetic dipole radiation mode is formed by using the parasitic metal columns, the metal top caps and the metal floor, and the low-frequency bandwidth is expanded. On the basis of miniaturization, the antenna provided by the invention can realize S11lt in 1-6GHz; and vertical polarization horizontal omnidirectional radiation of-10dB is realized, and the out-of-roundness of an omnidirectional radiation pattern is less than 3dB.

The application discloses a kind of structural multiplexing low profile dual-frequency coplanar antennas and communication equipment, including low-frequency radiation surface structure, dielectric substrate and reflector, the dielectric substrate is set above reflector, and low-frequency radiation surface structure is set on the dielectric substrate;The low-frequency radiation surface structure includes first low-frequency radiation surface and second low-frequency radiation surface, and the first low-frequency radiation surface is as multiplexing structure to realize high-frequency radiation surface structure, so that low-frequency radiation surface structure and high-frequency radiation surface structure are coplanar.The application is simple in structure, and the overall profile of antenna is low, and isolation is high.

The invention discloses a multi-frequency antenna radiation unit device with a decoupling function, and belongs to the field of mobile communication antennas. The high-frequency radiation unit comprises a balun electrically connected with the reflecting plate and a radiation arm connected to the balun; the low-frequency radiation unit is positioned on the periphery of the high-frequency radiation unit and is arranged on the reflecting plate; the capacitor loading assembly comprises a coupling patch connected with the radiation arm and a capacitor branch connected to the balun, the capacitor branch is located on the side, close to the reflecting plate, of the balun, the coupling patch and the capacitor branch form an additional capacitor connected with the high-frequency radiation unit in parallel, and the total equivalent capacitance of the high-frequency radiation unit is changed through the additional capacitor; therefore, the resonant frequency of the high-frequency radiation unit is shifted out of the low-frequency working frequency band, common-mode resonance generated when the high-frequency radiation unit and the low-frequency radiation unit are adjacently arranged is eliminated, the standing-wave ratio of a low-frequency port is improved, the working bandwidth is widened, distortion of a low-frequency radiation pattern is eliminated, and the coverage quality of a base station is guaranteed.

A nested and interwoven antenna for coexistence of 4G and 5G networks, comprising at least two high-frequency radiation arrays formed by arranging high-frequency radiation units in rows, at least one low-frequency radiation array formed by arranging low-frequency radiation units in rows, and a MIMO array, wherein the at least two high-frequency radiation arrays are arranged side by side, at least one low-frequency radiation array is nested between the at least two high-frequency radiation arrays, and at least one low-frequency radiation array and the upper or lower part of the at least two high-frequency radiation arrays are nested within the MIMO array. Through a special array layout and the use of filtering oscillators, 4G and 5G are integrated into an antenna with a relatively small size. The reasonable placement of the element spacing enables the performance of both the 4G and 5G network systems to reach the level of a single 4G antenna and 5G antenna.

The present invention relates to the technical field of base station antenna layout, and in particular to a structure for reducing the layout area of mobile communication base station antennas. The structure for reducing the layout area of mobile communication base station antennas includes: two radiation units and a high-frequency radiation unit; the two radiation units are orthogonally symmetrically distributed at 90°, and the radiation units are located above the high-frequency radiation unit. By making the FSS periodic module into an antenna radiation unit and utilizing the spatial filtering characteristics of the FSS, the present invention reduces the mutual interference between the high- and low-frequency radiation units, thereby further reducing the overall volume of the base station antenna while ensuring the technical indicators of each radiation unit and the overall base station antenna.

The invention discloses a high and low frequency nested radiation unit and a base station antenna. On one hand, the high and low frequency nested radiation unit comprises a plurality of low frequency radiation units arranged in an array; a high-frequency radiation unit is arranged on the low-frequency radiation unit through a feed network structure; the feed network structure comprises an upper feed network and a lower feed network, wherein the upper feed network is arranged in the positive direction of a base normal of an adjacent low-frequency radiation unit through an upper feed network supporting piece and is connected with the low-frequency radiation unit to realize + / -45-degree polarization; and the lower-layer feed network is arranged in the negative direction of the base normal of the adjacent low-frequency radiation unit through a lower-layer feed network support piece and is connected with the low-frequency radiation unit to realize + / -45-degree polarization. On the other hand, the invention also provides a base station antenna adopting the high and low frequency nested radiation unit. The method has the advantages that the matching precision can be ensured, the production process can be simplified to reduce the manufacturing cost, and the isolation stability is effectively improved to reduce the performance difference among batches.

The invention is applicable to the technical field of communication, and provides a frequency selection boundary and a multi-frequency array antenna, which comprises a reflecting plate, low-frequency radiation units, high-frequency radiation units and a frequency selection boundary, and is characterized in that the high-frequency radiation units are symmetrically distributed by taking the midpoint of the reflecting plate as the center to form a high-frequency array; the low-frequency radiation units are nested between two rows of adjacent high-frequency radiation units to form a low-frequency array, and the frequency selection boundary is arranged at the center of the reflecting plate. Therefore, according to the frequency selection boundary and the multi-frequency array antenna provided by the invention, good radiation of each frequency band of the multi-frequency antenna is ensured.

This invention discloses a microwave heating device with high-order mode suppression, belonging to the field of microwave heating technology. It includes: a heater comprising a rectangular waveguide and metal ridges; the rectangular waveguide has a microwave cavity extending laterally; two metal ridges are symmetrically arranged front-to-back within the microwave cavity, with a front-to-back spacing between them, and each ridge has a material passage hole extending front-to-back; and two high-order mode suppressors, respectively located at the front and rear ends of the heater, each high-order mode suppressor having a material cavity for the workpiece to be heated to pass through, extending front-to-back and communicating with the material passage hole. This invention features a compact structure, strong electric field, rapid and uniform heating, and protection against high-frequency radiation, preventing harm to operators from microwave spatial radiation and ensuring the safe use of the microwave heating device.

The utility model provides a radiation assembly and an antenna, the radiation assembly comprises a low-frequency oscillator and a high-frequency oscillator, an installation space is formed in the low-frequency oscillator, an installation table is arranged in the installation space, a through installation channel is formed in the installation table, the high-frequency oscillator is embedded in the installation space, and the high-frequency oscillator is embedded in the installation space. The high-frequency oscillator comprises a high-frequency radiation arm, a supporting piece and a feed core, the high-frequency radiation arm is connected with the supporting piece, the supporting piece penetrates through the mounting channel, a through feed channel is formed in the supporting piece, and the feed core penetrates through the feed channel to feed the high-frequency radiation arm. The radiation assembly is provided with the supporting piece led out of the low-frequency oscillator, so that the feed core of the high-frequency oscillator is led out of the low-frequency oscillator through the feed channel in the supporting piece, the feed core is electrically connected with a coaxial cable conveniently, the coaxial cable does not need to be led into the low-frequency oscillator, and the electrical performance of the radiation assembly is improved.

The application discloses a large-diameter Ku / Ka co-caliber VICTS antenna with a wide-band feed network, and belongs to the field of mechanically scanning antenna arrays. The antenna is composed of an upper metal disc and a lower metal disc, the upper metal disc is provided with co-caliber radiation branches, the lower metal disc is provided with a feed structure, and the two metal discs can rotate relative to each other; the co-caliber radiation branches include first staggered waveguide radiators and second staggered waveguide radiators which are arranged alternately; wherein the first staggered waveguide radiators are high-low frequency shared radiators, and the second staggered waveguide radiators are high frequency radiators. The antenna solves the problems of high profile height and insufficient bandwidth faced by traditional VICTS antennas, and has a similar basic working principle to the traditional VICTS antenna, so that the existing VICTS antenna can be directly replaced without changing the related control and servo technology.

The utility model discloses a high-frequency electromagnetic radiation monitor, and relates to the technical field of electromagnetic radiation monitoring. The high-frequency radiation monitor comprises a high-frequency radiation monitor body, an expansion fixing frame is fixedly arranged at the bottom end of the high-frequency radiation monitor body, an overturning frame is rotatably arranged on the expansion fixing frame, a pushing overturning assembly used in cooperation with the overturning frame is arranged in the expansion fixing frame, and an overturning protection assembly is arranged on the overturning frame. A photovoltaic panel is arranged in the turnover protection assembly; according to the utility model, by arranging the pushing overturning assembly, the pushing overturning assembly drives the overturning frame to overturn with the overturning shaft as the axis, so that the overturning frame is overturned and unfolded to drive the photovoltaic panel to overturn synchronously, and the photovoltaic panel is convenient to store and unfold; and by arranging the foldable photovoltaic panel capable of being stored, light energy is converted into electric energy to achieve a continuous function on the high-frequency radiation monitor body, so that the cruising ability is improved.

This invention provides a self-decoupling intermediate frequency (IF) radiating element and a mobile communication antenna, relating to the technical field of wireless communication. The self-decoupling IF radiating element includes a radiating substrate, a dielectric block, two sets of orthogonally polarized dipoles, and four metal patches. The mobile communication antenna includes the self-decoupling IF radiating element. Each metal patch of the self-decoupling IF radiating element forms a capacitive-inductive resonant circuit with each radiating arm. This resonant circuit can add at least one high-frequency resonant point, ensuring that the electrical performance of the self-decoupling IF radiating element remains unaffected while possessing the characteristic of transmitting high-frequency electromagnetic waves. This allows electromagnetic waves generated by the high-frequency radiating element nested below the self-decoupling IF radiating element to effectively pass through, thereby generating good radiation into space. Specifically applied in mobile communication antennas, this eliminates the need for additional decoupling circuits, does not increase insertion loss, and reduces the design complexity and size of common-aperture antennas.

The utility model relates to the technical field of mobile communication antennas, and discloses an integrated common-caliber radiation unit and an antenna, comprising a low-frequency radiation unit and a high-frequency radiation unit, one end of each low-frequency feed balun and one end of each high-frequency feed balun are electrically connected with the dipole of the corresponding frequency band, the other ends of the low-frequency feed balun and the high-frequency feed balun are mutually connected into a whole to form a shared base, and a feed port of the high-frequency radiation unit is integrally integrated on the back of the shared base; the high-frequency radiation arms of the high-frequency radiation unit and the low-frequency feed balun structures of the low-frequency radiation unit are staggered and do not interfere with each other in the orthographic projection direction; according to the utility model, the integrated die-casting molding of the common-caliber radiation unit is realized, the part composition of the common-caliber high-low frequency radiation unit is reduced, the assembly process of embedding the high-frequency radiation unit into the caliber of the low-frequency radiation unit and the positioning assembly are omitted, the assembly is simpler, the weight of the radiation unit is lighter, and the intermodulation hidden danger points are fewer; and indexes are easier to control.

The application relates to a single-layer multi-frequency GNSS antenna, which comprises a patch antenna body, the patch antenna body comprises a dielectric substrate and a ground plane, the center of the upper surface of the dielectric substrate is provided with a clover-shaped high-frequency radiation metal plate, the periphery of the high-frequency radiation metal plate is provided with a low-frequency radiation metal plate, a first non-metal gap is arranged between the high-frequency radiation metal plate and the low-frequency radiation metal plate, four edges of the low-frequency radiation metal plate are provided with accommodation grooves, long-strip-shaped radiation metal patches are arranged in the accommodation grooves, and rectifier radiation parts are arranged between four corners of the low-frequency radiation metal plate and adjacent two accommodation grooves, and the four rectifier radiation parts correspond to four sharp corners of the clover-shaped high-frequency radiation metal plate. The application belongs to the technical field of antennas, the radiation performance of the antenna is optimized through a special geometric layout, the foundation of antenna miniaturization and low cost is laid, and the dual-band coverage and good radiation characteristics are preliminarily ensured.

The invention provides a broadband wave-transparent base station antenna, relates to the technical field of microwave and millimeter wave communication, and solves the technical problem that most common-caliber base station antenna design schemes in the prior art are relatively narrow in wave-transparent bandwidth. According to the technical scheme, the antenna comprises a low-frequency radiation unit, a high-frequency radiation unit and a rectangular reflection ground; the four high-frequency radiation units are arranged at the four corner ends of the low-frequency radiation unit respectively. Compared with a traditional frequency selective surface structure, more capacitance and inductance components are introduced, and the broadband wave-transparent performance is achieved.

A wide-band wave-transmitting / filtering radiation unit, a shared-aperture antenna array, and a communication device are disclosed. The radiation unit includes a radiation structure and a feed structure, where the radiation structure and the feed structure are coupled for feeding, so that the radiation structure radiates low-frequency electromagnetic wave signals outward; the radiation structure includes a radiator, and the radiator is loaded with a plurality of layers of surface periodic structures; when the radiation structure operates in a first mode, electromagnetic waves excited by a high-frequency radiation unit irradiates the radiation structure, and the radiator and the plurality of layers of surface periodic structures collectively form a non-resonant node spatial band-pass filter circuit with K resonant points and K null points; and when the radiation structure operates in a second mode, low-frequency electromagnetic waves excite the radiation structure by means of the feed structure, and units of the plurality of layers of surface periodic structures are excited by the radiator in a parallel manner to form an equivalent filter circuit. The present disclosure can improve radiation pattern distortion of a multi-band antenna, and enhance indexes such as antenna gain, out-of-band suppression, and a cross-polarization ratio.

The invention discloses a common-aperture dual-frequency antenna with a directional diagram conformal characteristic, and belongs to the technical field of microwave antennas. According to the antenna array disclosed by the invention, the high-frequency radiation pattern can still keep stable performance under the condition that the high-frequency antenna and the low-frequency antenna are in the same aperture. The high-frequency antenna unit and the low-frequency antenna unit both adopt annular dipole radiators, and a feed part adopts a balance balun; the radiation arm of the low-frequency unit does not need to be modified, and coupling can be eliminated only through induction of a simple patch, so that the design process and the design complexity of the base station common-caliber antenna are greatly simplified. The antenna array has a wide prospect in design and application of base station antennas.

The present invention relates to the field of electrotherapy auxiliary equipment, and provides a high-frequency electrotherapy radiation shielding device, comprising: a shielding tube for shielding radiation; a first end of the shielding tube for a high-frequency transmitter head to penetrate, and a second end of the shielding tube as a treatment end; an area adjustment structure disposed inside the shielding tube, and the area adjustment structure is used to adjust the area of ​​a treatment area based on the patient's diseased area, the treatment area for high-frequency transmission waves to pass through; a control box disposed outside the shielding tube, and the control box is electrically connected to the area adjustment structure for controlling the area adjustment structure. The high-frequency electrotherapy radiation shielding device provided by the present invention shields radiation through the shielding tube, and the control box controls the area adjustment structure for adjusting the size of the treatment area, achieving the most ideal treatment effect according to the needs of different patients and different treatment areas, while also effectively avoiding leakage of high-frequency radiation and protecting the health of medical staff.

The present invention belongs to the field of microwave communication technology, and specifically relates to a dual-polarization differential dielectric resonator antenna with filtering function. The present invention is composed of an orthogonal combination of two linearly polarized antennas with the same structure. A microstrip differential feeder is designed at the bottom of a dielectric substrate and is connected to a dipole structure designed on the virtual ground of the dielectric resonator through metal through-holes and pads. The radiating structure consists of three parts: a dipole, a dielectric resonator, and a dielectric patch resonator placed on top of the dielectric resonator. The resonant modes of these three radiators correspond to the following within the antenna operating frequency band: the 1 / 2 wavelength resonance of the dipole, the #imgabs0# mode of the dielectric resonator, and the #imgabs1# mode of the dielectric patch resonator. At the low-frequency radiation zero point, the dipole circuit structure on the virtual ground introduces a radiation zero point; at the high-frequency radiation zero point, the electric field generated by the dipole structure offsets the #imgabs2# mode of the dielectric patch resonator, introducing a radiation zero point, thereby realizing the function of a simple filtering antenna.

The utility model provides a variable polarization test system for a high-frequency radiation sensitivity horn antenna, and relates to the technical field of electromagnetic compatibility detection. The variable polarization test system for the high-frequency radiation sensitivity horn antenna comprises a lifting vehicle body, a cabinet is installed on the top of the lifting vehicle body, and a baffle is installed on the cabinet. By arranging the lifting vehicle body, the height of the horn antenna body can be conveniently adjusted, a transmitting antenna is aligned to a tested area to be tested, the height and polarization of the antenna are adjusted, meanwhile, the adjusting steps are simple, operation is convenient, the transmission path from a power amplifier output waveguide port to the antenna is short, loss is low, the system is stable and easy to use, and the vibration resistance is high; the test efficiency is greatly improved, and the waveguide rotary joint is arranged and is installed on the baffle through the rotary joint clamp, so that the waveguide rotary joint can drive the horn antenna body to rotate, and the purpose of angle adjustment is achieved.

The application relates to a multi-frequency radiation unit and an array antenna. The multi-frequency radiation unit comprises: a low-frequency vibrator of a low-frequency radiation unit supported on a first side of a reflecting plate through a low-frequency feed, the low-frequency feed feeds the low-frequency vibrator, four low-frequency radiation arms of the low-frequency vibrator are parallel to a first side surface of the reflecting plate, and the four low-frequency radiation arms form a cross shape to form four included angle regions; four high-frequency radiation units are correspondingly distributed in the four included angle regions; a high-frequency vibrator of the high-frequency radiation unit is supported on the first side of the reflecting plate through a high-frequency feed, the high-frequency feed feeds the high-frequency vibrator, a high-frequency radiation surface of the high-frequency vibrator is parallel to the first side surface of the reflecting plate, the distance between the high-frequency radiation surface and the low-frequency radiation arm in the direction perpendicular to the first side surface is less than one-quarter of the wavelength of the high-frequency vibrator, and a grounding substrate is arranged between the high-frequency vibrator and the reflecting plate and is parallel to the high-frequency radiation surface. The multi-frequency radiation unit of the application reduces the inter-frequency mutual coupling and is not limited by the high-frequency bandwidth.

This invention provides a grounding electromagnetic lock, comprising a housing, an electromagnetic actuation component, and a control circuit board. Both the electromagnetic actuation component and the control circuit board are housed within the housing. The lock also includes a connector and a grounding rod fixing mechanism. The grounding rod fixing mechanism includes a connecting rod body, a fixing nut, a first gear, and a second gear. The fixing nut is located on the connecting rod body. A universal connector is detachably provided at the bottom of the connecting rod body for connecting the grounding rod. When the connecting rod body is inserted into the connector, the first and second fixing handles are used to tightly contact the bottom surface of the fixing nut after rotation. This invention fully considers interference types and volume requirements, and specifically designs each component of the electromagnetic lock to prevent electromagnetic interference. This ensures that the entire chain of wireless signal power supply, acquisition, processing, and transmission can effectively cope with switch operation surges, power frequency magnetic fields, and high-frequency radiation within substations, guaranteeing the reliability and stability of wireless signal transmission.

The utility model relates to a single-layer double-frequency GNSS antenna which comprises an antenna medium and a bottom layer metal structure, a high-frequency radiation metal patch is arranged at the center position of the upper surface of the antenna medium, a low-frequency radiation metal patch is arranged on the upper surface of the antenna medium, fan-shaped metal radiation patches are arranged at the four corners of the antenna medium, and the fan-shaped metal radiation patches are arranged on the bottom layer metal structure. An arc-shaped isolation seam is arranged between the fan-shaped metal radiation patch and the low-frequency radiation metal patch; metal through hole structures are arranged on the high-frequency radiation metal patch, the low-frequency radiation metal patch and the fan-shaped metal radiation patch, and feeding points are arranged on the high-frequency radiation metal patch and the low-frequency radiation metal patch. The utility model belongs to the technical field of antennas, a high-frequency radiation metal patch and a low-frequency radiation metal patch are arranged on an antenna medium and are isolated through a non-metal gap, a double-frequency function is obtained, the size of the antenna is effectively reduced, complexity of a traditional multi-layer structure is avoided through a single-layer integrated design, and miniaturization application is facilitated.

A method and system for reducing radiation at predetermined frequencies using delay elements and related devices is disclosed. The device includes an input terminal (102) for receiving a signal (104), a delay element (108) electrically connected to the input terminal, an output terminal (112) for providing a slew rate reduced signal (114), and a combining circuit (116) electrically connected to the delay element and the output terminal. The delay elements provide delayed signals (110) responsive to the received signal. Each of the delayed signals includes a delayed version of the received signal. The combining circuit combines the delayed signals to generate the slew rate reduced signal. The delays associated with the delay elements are selected to reduce radiation at one or more predetermined frequencies of the slew rate reduced signal compared to the received signal.