218 results about "Electrical probe" patented technology

The embodiment of the invention provides a ka and k waveband dual-frequency dual-polarization broadband wide-angle scanning common-aperture antenna unit and an antenna array, and relates to the technical field of common-aperture antenna arrays, the antenna unit comprises an antenna unit substrate, a low-frequency antenna, a high-frequency antenna and a wide-angle matching layer; the low-frequency antenna and the high-frequency antenna are arranged in the antenna unit substrate, and the high-frequency antenna comprises a shielding enclosure frame which is located between the low-frequency antenna and the high-frequency horizontal polarization L-shaped feed probe and between the low-frequency antenna and the high-frequency vertical polarization L-shaped feed probe; the wide-angle matching layer is arranged on the front surface of the antenna unit substrate and is positioned above the low-frequency antenna and the high-frequency antenna; wherein the low-frequency antenna is an L-shaped probe coupling microstrip patch antenna with a shielding enclosure frame, and the high-frequency antenna is a slot antenna. The antenna is simple in structure, employs a printed board technology, is very low in processing difficulty, is lower in cost, and is easy to be interconnected with rear-end equipment.

The invention discloses a Ka-band four-tilt-beam magnetoelectric dipole antenna, and belongs to the technical field of millimeter wave radio frequency front-end devices. Based on a magnetoelectric dipole composite radiation structure, four centrosymmetric radiation units are integrated on a low-loss substrate. The antenna comprises a probe patch of a coaxial gamma-shaped feed probe, a radiation patch, a parasitic patch, an upper dielectric substrate, a lower dielectric substrate, a middle curing layer, a shorter metal through hole of the coaxial gamma-shaped feed probe, a longer metal through hole of the coaxial gamma-shaped feed probe, a metal through hole c of the radiation patch, a metal through hole d of the parasitic patch and a metal ground backboard, a probe patch, a radiation patch and a parasitic patch of the coaxial gamma-shaped feed probe are located on the upper surface of the upper-layer dielectric substrate, and a metal ground backboard is located on the lower surface of the lower-layer dielectric substrate; the antenna has ultra-wide impedance bandwidth, has the characteristics of low cost, miniaturization, low cross polarization and back lobe suppression, and is superior to a traditional inclined beam antenna and an antenna array scheme.

The dual-polarized antenna comprises a first dielectric substrate, a second dielectric substrate, a third dielectric substrate, a fourth dielectric substrate, a fifth dielectric substrate and a double-feed probe, the first dielectric substrate, the second dielectric substrate and the fifth dielectric substrate are stacked, one surface of the first dielectric substrate is provided with four centrosymmetric patch units, and the surface, close to the first dielectric substrate, of the second dielectric substrate is provided with a radiation patch coaxial with the patch units. A first I-shaped gap and a second I-shaped gap which are crossed, vertical and centrosymmetric are formed in the third dielectric substrate close to the second substrate surface, a plurality of first metalized via holes are formed in the periphery, and the gaps are coaxial with the patch unit; the fourth dielectric substrate is provided with a first T-shaped microstrip feeder line and a second T-shaped microstrip feeder line which are not in contact with each other, the periphery of the fourth dielectric substrate is provided with second metalized via holes which are in one-to-one correspondence with the first via holes, and the feeder lines are respectively corresponding to the I-shaped gaps; and the double-feed probe is respectively connected with the feed points of the first T-shaped microstrip feeder and the second T-shaped microstrip feeder through feed holes. By adopting the dual-polarized antenna, the port isolation and the wide-angle scanning range can be improved.

The application discloses an antenna device and an antenna system. The antenna device is an antenna array composed of multiple microstrip antenna units. Each microstrip antenna unit comprises a dielectric substrate, a radiation patch, a metal back plate, a feed probe and a shorting post. The radiation patch is located on the upper surface of the dielectric substrate, the metal back plate is located on the lower surface of the dielectric substrate, the feed probe penetrates the dielectric substrate to connect one end of the radiation patch with the metal back plate, and the shorting post penetrates the dielectric substrate to connect the other end of the radiation patch with the metal back plate. By configuring the shorting post on the radiation patch and simultaneously exciting the first-order mode and the second-order mode, the radiation power of the microstrip antenna unit in a preset area can be suppressed to generate a radiation zero point, so that the signal radiated by the microstrip antenna unit has asymmetry, and the asymmetry of the antenna array is realized. The antenna system composed of the antenna array can realize the coupling suppression of the transmitting and receiving arrays of the antenna system, and further improve the isolation of the transmitting and receiving arrays.

The invention provides a low-profile portable dual-band Beidou navigation antenna, and belongs to the technical field of antennas. Comprising an upper-layer radiation sheet, a dielectric substrate, a lower-layer main radiation sheet, a coupling short-circuit branch knot and a feed probe, the dielectric substrate adopts a single-layer structure, the lower part of the dielectric substrate is hollowed out to form a cavity, the lower-layer main radiation sheet is covered in the cavity, and the coupling short-circuit branch comprises a coupling branch embedded in a rectangular groove of the lower-layer main radiation sheet, a short-circuit branch connected with the coupling branch and an extension branch connected with the short-circuit branch; the upper radiation sheet covers the upper layer of the dielectric substrate; and the feed probe and the lower-layer main radiation sheet perform coupling feed, and penetrate through the dielectric substrate and the upper-layer radiation sheet to perform direct feed. On one hand, the weight of the antenna is reduced, on the other hand, good matching and circular polarization performance are achieved in the B1 / B3 frequency band through dual-frequency feed and four-probe phase regulation and control, and the antenna can be applied to portable Beidou navigation terminal equipment sensitive to the size and the weight.

The utility model relates to a broadband wide-beam horn antenna, which comprises an antenna main body, a feed port, a feed probe, a polarizer, a waveguide and a beam widening structure, the antenna body is in a cuboid shape with an opening in the upper middle end inside, through holes are formed in the left side face and the right side face of the antenna body, feed ports are connected to the through holes, feed probes are arranged in the feed ports, a polarizer is vertically connected to the bottom face inside the antenna body, and the polarizer is located between the two feed probes. The open end of the antenna main body is connected with a waveguide, and the inner diameter of the waveguide is gradually increased along the direction close to the antenna main body to form a horn shape with a big-end-down opening; the side surface of the waveguide is provided with a wave beam widening structure which extends outwards. The antenna with the structure has the advantages that the antenna with the structure can achieve the wide-beam antenna gain of 1.5 dB within + / -60 degrees and the wide-beam antenna gain of-0.5 dB within + / -70 degrees; and the working bandwidth can reach 10%. And the diameter is only 1.27 times of the wavelength of the lowest working frequency.

A portable, multimodal dental diagnostic device for assessing the vitality of the dental pulp, consisting of: a detachable diagnostic component comprising a variety of probes, including the following: a heat probe configured to deliver controlled heat stimuli to a tooth surface and measure the heat response of the dental pulp; an electrical probe configured to deliver low-voltage electrical pulses to the tooth surface and measure the electrical impedance of the dental pulp; and an optical probe configured to assess blood oxygen saturation and microcirculation in the dental pulp using near-infrared light; a microcontroller unit configured to process sensor data from the thermal probe, the electrical probe and the optical probe, to calibrate measurements based on the oral base temperature and the ambient conditions, to aggregate multimodal sensor data and to control the operation of the thermal probe, the electrical probe and the optical probe; a cloud platform configured to receive and store aggregated sensor data, run artificial intelligence algorithms to analyze multimodal sensor data and generate diagnostic insights that include vital signs and diagnostic probabilities; a user application that is communicatively connected to the cloud platform and configured to wirelessly receive aggregated sensor data, display detailed diagnostic reports with vital signs and trends to the user, integrate with electronic health data systems, and issue alerts in case of abnormal readings; a wireless communication module connected to the microcontroller unit, configured to transmit the aggregated sensor data to the cloud platform; a display interface configured to show real-time feedback from the probes, including vitality assessments and sensor readings; and a main body containing the microcontroller unit, a rechargeable power supply and the display interface, wherein the rechargeable power supply can be charged via the current provided through a charging port on the main body, and wherein the main body is also equipped with on / off and start / stop switches; the device is configured to provide a non-invasive, quantitative real-time analysis of dental pulp health by combining physiological responses from thermal, electrical, and optical measurements.

The utility model relates to a missile-borne low-profile, miniaturized and low-frequency-division-ratio dual-frequency antenna, and belongs to the technical field of communication. The dual-frequency antenna comprises a metal bottom plate, an antenna housing fixed with the metal bottom plate, and a dielectric substrate fixed between the metal bottom plate and the antenna housing. Wherein the dielectric substrate comprises an upper-layer dielectric substrate and a lower-layer dielectric substrate which are bonded with each other; metal patches are loaded on the surfaces of the upper-layer dielectric substrate and the lower-layer dielectric substrate; the upper-layer dielectric substrate and the lower-layer dielectric substrate are electrically connected through a metal column located on the central axis of the dielectric substrate, and the lower-layer dielectric substrate and the metal bottom plate are electrically connected through a feed probe located on the central axis; and the metal patches on the surfaces of the upper-layer dielectric substrate and the lower-layer dielectric substrate are horizontally symmetrical along the central axis. According to the utility model, the dual-frequency antenna with low profile, small size and low frequency division ratio is realized, the frequency division ratio is low under the condition that the basic radiation efficiency is guaranteed, and two narrowband working frequency bands can be provided in the s wave band.

The invention discloses a double-frequency circularly polarized antenna element, which belongs to the technical field of antennas and comprises a high-frequency-band radiation unit and a low-frequency-band radiation unit. The high-frequency band radiation unit comprises a first dielectric substrate and a first feed probe. A first radiation patch is embedded in one end face of the first dielectric substrate, and the first radiation patch is provided with two symmetrical chamfers. The top end of the first feed probe passes through the first through hole and is fixedly connected with the first radiation patch. The low-frequency-band radiation unit comprises a second dielectric substrate, a second radiation patch and a third dielectric substrate. The second radiation patch is arranged on the second dielectric substrate. The second dielectric substrate is provided with a second metalized through hole. The third dielectric substrate is provided with a Chebyshev Balun feed printed line. The antenna element provided by the invention not only can realize the circular polarization of the antenna, but also can reduce the coupling between antennas of different working frequency bands while expanding the bandwidth of the antenna, improve the isolation between two working frequency band ports, and reduce the cross polarization.

The invention relates to an anti-interference high-selectivity omnidirectional planar filtering antenna, a filtering processing method and application, and the planar filtering antenna comprises a metal radiation layer, a first dielectric substrate, a first coupling layer, a second dielectric substrate and a second coupling layer which are sequentially stacked. The second dielectric substrate is provided with a plurality of metalized through holes which are distributed in an annular array mode and define a substrate integrated cavity with the first coupling layer and the second coupling layer, the metalized through holes divide the second coupling layer into an inner side patch and an outer side ring piece, and the inner side patch is evenly provided with a plurality of resonance grooves; and a feed probe penetrating and extending to the second dielectric substrate is arranged at the center of the bottom of the metal radiation layer. According to the invention, the substrate integrated waveguide technology is adopted, the substrate integrated cavity is formed, and a high-selectivity filtering effect is realized by utilizing the characteristic of high Q value, so that the interference of out-of-band signals is effectively inhibited, and the advantages of the patch antenna and the substrate integrated cavity are effectively combined.

The invention relates to the technical field of in-situ electrics, and provides an in-situ electrical property real-time analysis system based on an environmental scanning electron microscope, comprising: an environmental atmosphere simulation module; an electron gun pole shoe is arranged on the top side of the electron microscope chamber, a low-temperature sample table is arranged in the electron microscope chamber, and the electron microscope chamber is communicated with the environment atmosphere simulation module; the low-temperature Dewar is connected with the low-temperature sample table; the electrical probe is arranged on the inner wall of the electron microscope chamber, and the source meter is used for monitoring electrical signals. An environment atmosphere is simulated through an environment atmosphere simulation module, an electron gun pole shoe is arranged on the top side of an electron microscope chamber and used for imaging, a low-temperature sample table is arranged in the electron microscope chamber and used for bearing a to-be-tested sample, a low-temperature Dewar provides a low-temperature environment for the low-temperature sample table, and an electrical probe in a resistance analysis module conducts electrical monitoring on the sample. And electrical signals are monitored through a source meter, so that in-situ real-time online analysis of electrical properties of a scanning electron microscope observation machine on the surface of the material under different environment atmospheres is realized.

The invention discloses a Ka-band broadband characteristic magnetoelectric dipole antenna, and belongs to the technical field of millimeter wave radio frequency front-end devices. The antenna comprises an upper-layer dielectric substrate, a semi-cured layer, a lower-layer dielectric substrate and a metal ground backboard which are stacked from top to bottom. The surface of the upper dielectric substrate is provided with four special hexagonal radiation patches, a central rectangular feed patch and four rectangular parasitic patches. A cross-shaped gap is defined by the four radiation patches, and the center feed patch and the specific metal through hole and the metal blind hole in the lower layer jointly form an inverted L-shaped feed probe. And each radiation patch and each parasitic patch are respectively connected to the metal ground backboard through metal through holes. The antenna has the advantages of wide bandwidth, stable performance and compact structure.

The invention discloses a dual-band dual-linear polarization reconfigurable folding transmission-reflection array antenna, which comprises an upper-layer metasurface, a lower-layer metasurface and a feed source antenna, the upper-layer metasurface is provided with 12 * 12 first unit structures, and each first unit structure comprises a first metasurface metal patch, a first dielectric substrate, a second metasurface metal patch, a second dielectric substrate and a third metasurface metal patch which are connected from top to bottom; the lower-layer metasurface is provided with 12 * 12 second unit structures, and each second unit structure comprises an annular gap metal patch, a third dielectric substrate and a bottom-layer feeder line which are connected from top to bottom; two PIN diodes are integrated in an annular gap of the annular gap metal patch, and the annular gap metal patch is connected with a bottom feeder line located on the upper surface of the third dielectric substrate through a feed probe; and a 2 * 2 unit size is reserved in the center of the lower-layer metasurface and is used for placing a feed source antenna. According to the invention, dual-frequency dual-linear polarization bidirectional wave beam scanning is realized, and the low-profile characteristic is realized.

The invention discloses a dual-port coaxial feed circular polarization magnetoelectric dipole antenna, and belongs to the technical field of millimeter wave satellite communication antennas. The antenna comprises a first metal patch layer, a dielectric substrate a, a second metal patch layer, a dielectric substrate b and a metal ground which are sequentially stacked from top to bottom, the second metal patch layer comprises four radiation patches which are arranged in a rectangular array, and each radiation patch is composed of a square patch and a circular ring patch at an inner corner; a metal through hole is formed in the dielectric substrate and is connected with the radiation patch and the metal ground, so that a magnetoelectric dipole radiation path is formed; the first metal patch layer is provided with a probe patch a, the center of the second metal patch layer is provided with a probe patch b, and the probe patch a and the probe patch b form two space orthogonal inverted L-shaped feed probes through a short column and a long column respectively; and the inner conductors of the two feed ports are respectively connected with the long columns of the two probes. The antenna has the advantages of wide impedance bandwidth, wide beam coverage, low profile and easy integration, and is suitable for a low-orbit satellite communication terminal.

A magneto-electric dipole antenna array includes a substrate and at least one antenna unit. Each of the at least one antenna unit includes an electric-dipole component, a magnetic-dipole component, a first feeding probe, a second feeding probe and a stripline. The electric-dipole component is disposed on an upper surface of the substrate. The magnetic-dipole component is disposed in the substrate and between the upper surface and a lower surface of the substrate, and is electrically connected to the electric-dipole component. The first feeding probe is disposed on the upper surface of the substrate for vertical polarization. The second feeding probe is disposed in the substrate and between the upper surface and the lower surface of the substrate for horizontal polarization. The stripline is disposed in the substrate and between the first feeding probe and the second feeding probe for capacitive coupling.

The invention discloses an antenna unit capable of being used for a low RCS array, and belongs to the technical field of antennas. The antenna comprises a radiation structure layer and a feed network layer. The radiation structure layer comprises rectangular metal patches and special-shaped metal patches which are arranged in an array. The rectangular metal patches form a 2 * 4 array in the same plane; the number of the special-shaped metal patches is two, and the two special-shaped metal patches are located below the 2 * 4 array. The feed network layer is located below the radiation structure layer, and a T-shaped branch knot is arranged between an upper metal plate and a lower metal plate of the feed network layer; a radio frequency socket is arranged at the bottom of the lower metal floor, and an outer conductor of the radio frequency socket is connected with the lower metal plate; an inner conductor of the radio frequency socket penetrates through the lower metal floor and is connected with a common end of the T-shaped branch knot, and two branch ends of the T-shaped branch knot are connected with the corresponding special-shaped metal sheets through the corresponding feed probes. According to the invention, a radiation function and a scattering control function are integrated, so that the radiation performance of the antenna is ensured, and the RCS of the unit and the scattering grating lobes during array splicing use are obviously reduced.

The application discloses a microwave plasma testing device, system and method. The microwave plasma testing device comprises an electrostatic probe, a probe current voltage measurement module and a control module which are connected in sequence, and a scanning power generation module is further connected between the electrostatic probe and the control module; the control module generates a test signal, and the scanning power generation module generates a scanning voltage according to the test signal to drive the electrostatic probe to work; the electrostatic probe collects current voltage signals of a microwave plasma to be tested under the scanning voltage when working; the probe current voltage measurement module processes the current voltage signals to obtain processed current voltage signals; and the control module calculates the processed current voltage signals to obtain test parameters of the microwave plasma to be tested. The current voltage signals are collected through the electrostatic probe, the microwave plasma can be tested quickly and accurately, and the accuracy and effect of the test are improved.

The utility model discloses an insulation degree detection device for insulation product processing, which belongs to the technical field of insulation degree detection of insulation products, and is characterized in that the insulation degree detection device comprises a detection table, a fixed rotation mechanism is arranged, support plates of the fixed rotation mechanism are arranged on two sides of the top of a support seat, and a pushing and clamping structure of a right support plate and a servo motor of a left support plate cooperatively operate; an insulating product is placed between the clamping and rotating plate and the pushing and clamping structure, the pushing and clamping structure is controlled to move through the touch screen display controller and is matched with the clamping and rotating plate to complete clamping and positioning, the top face of the product is detected through the discharge probe and the power receiving piece, the electric cabinet detects current, the insulating performance is calculated, and data are transmitted to the touch screen display controller; and the touch screen display controller starts the servo motor according to a set program to drive the clamping and rotating plate to rotate slowly, so that the product rotates to different surfaces or angles along with the clamping and rotating plate to stop, and detection and current calculation are performed again, so that the insulation degree detection of different surfaces of the insulating product can be realized.

The utility model relates to the technical field of detection, in particular to an air tightness testing device for a PCB air pressure sensor, which comprises a negative pressure flow control module, a carrier module and a sealing module, the carrier module comprises a base, an air inlet is formed in the bottom face of the base, and the negative pressure flow control module is connected with the air inlet through a pipeline. The sealing module comprises a cylinder and a signal access probe arranged in the cylinder, a PCB with an air pressure sensor is arranged in the cylinder in a sealed mode, the signal access probe is vertically arranged, the top end of the signal access probe makes contact with an air pressure sensor signal pin on the PCB, a power supply probe is arranged in the base, and the power supply probe is connected with the PCB. The power supply probe is in contact with the bottom end of the signal access probe; and the base and the cylinder are buckled to form a sealed cavity at the same time. The air tightness detection of the air pressure sensor on the PCB can be realized, so that human resources are effectively saved, and the working efficiency is improved.

The utility model discloses a soft contact conductive probe, and belongs to the field of conductive probes. Comprising a needle rod, a needle cylinder and an outer spring, the needle rod movably penetrates through the needle cylinder, the needle rod is sleeved with the outer spring, one end of the outer spring abuts against or is connected with the needle cylinder, and the other end of the outer spring abuts against or is connected with the needle rod; one end of the needle rod is provided with a first electric connection part, the other end of the needle rod is provided with a second electric connection part, and the first electric connection part is provided with an annular spring used for being connected with an external conductive piece. Compared with the prior art, the contact type connection between the conductive probe and the external conductive piece is realized by arranging the annular spring, and the annular spring can be deformed and has a buffering effect, so that the annular spring is flexibly connected with the external conductive piece, and the conductive performance is more stable when the annular spring is used for conducting large current; and meanwhile, the flexible connection can also reduce the abrasion generated between the annular spring and the external conductive piece, so that the service life of the probe can be prolonged.

A dual-mode antenna array (300) receives RF signaling (104) for AoA analysis and includes a substrate (302), a ground plane (402) disposed at a first side, and a pair of radiating elements (308-1, 308-2) disposed at a second side. Each radiating element in the pair includes a conductive material arranged in a modified rectangular shape having a first slot (318) on the first side, a second slot (320) on the second side, a third slot (322) on the third side, and a fourth slot (324) on the fourth side. The antenna array further includes a feed probe (310) disposed adjacent to the radiating element pair and a pair of feed lines (314-1, 314-2), each feed line being conductively connected to the feed probe at a first end and conductively connected to each of a first feed point (341) and a second feed point (342) of a corresponding radiating element at a second end.

An electronic device may be provided with an antenna module having a substrate. A phased antenna array of dielectric resonator antennas and a radio-frequency integrated circuit for the array may be mounted to one or more surfaces of the substrate. The dielectric resonator antennas may include dielectric columns excited by feed probes. The feed probes may be printed onto sidewalls of the dielectric columns or may be pressed against the sidewalls by biasing structures. A plastic substrate may be molded over each dielectric column and each of the feed probes in the array. The feed probes may cover multiple polarizations. The array may include elements for covering multiple frequency bands. The dielectric columns may be aligned a longitudinal axis and may be rotated at a non-zero and non-perpendicular angle with respect to the longitudinal axis.

The invention discloses a compact dual-frequency patch antenna based on a decoupling structure shaped like a Chinese character'tu ', which comprises a top metal layer, a dielectric substrate, a metal ground layer and a coaxial probe feed structure, and a decoupling structure shaped like a Chinese character'tu ', which is formed by symmetrically arranging four metal strips along the horizontal direction, is arranged between the two patches. The antenna can synchronously work at double frequency bands of 3.39 GHz and 5.45 GHz, an electromagnetic weak field area is formed at the position of the feed probe through the decoupling structure shaped like the Chinese character'tu 'to block coupling, and meanwhile, a radiation pattern is corrected by means of a symmetrical structure. The antenna has the advantages of being low in profile, compact in structure, good in dual-frequency decoupling effect and stable in radiation pattern, the integration degree of the dual-frequency antenna array can be improved, and the antenna is suitable for a wireless communication system.

The utility model discloses a multi-station intelligent electric energy meter data extraction workbench, which comprises a test board, a wiring terminal and an upper computer, a circuit system is arranged in the test board; the plurality of wiring terminals are arranged side by side at the back plate of the test bench; a power-on probe and a communication probe are arranged at the top of the wiring terminal; the power-on probe is detachably connected with the power-on end of the electric energy meter, and the communication probe is detachably connected with the communication end of the electric energy meter. The communication end of the wiring terminal is communicated with an upper computer through a wire. The workbench provided by the utility model is convenient to operate and high in testing efficiency.

In a test method for performing a cable magnetic flux leakage test for detecting defects, a test device (100) and a cable (200) are moved relative to each other in a longitudinal direction of the cable. In this case, by means of a magnetizing device (120) of the testing device, the part of the cable is magnetized segment by segment in such a way that the magnetizing field line in the cable is oriented substantially in the longitudinal direction of the cable. The circumference of the magnetized portion of the cable is scanned by means of a magnetic field sensitive probe (140) of a probe device (130) for detecting a leakage magnetic field due to a defect. The probe device has a plurality of magnetic field-sensitive probes (140) which are arranged offset from one another in the circumferential direction and are arranged at a test distance (142) from the surface of the material under test during the test. The electrical probe signals of these probes are evaluated for qualification of defects. Each probe of the probe arrangement is arranged in a movably arranged test shoe (150) having a sliding surface (146) for sliding on the circumferential surface of the cable, the probe (140) being arranged at a probe distance (145) relative to the sliding surface. In a first test configuration, the test shoe (150) is pressed onto the circumferential surface such that the sliding surface (146) is in contact with the circumferential surface and the probe is held at a limited first test distance from the surface of the material under test substantially corresponding to the probe distance.

This disclosure relates to a radio frequency (RF) device, which comprises radiators and a distribution network (DN). The DN comprises one or more DN layers. Each DN layer comprises RF circuitry designed to feed at least one radiator or to connect to another DN layer. Each DN layer further comprises one or more bendable feeding probes, each protruding from the DN layer and being connected to the RF circuitry of the DN layer. The RF device also comprises a planar dielectric structure arranged on the DN. The one or more feeding probes extend through one or more gaps in the dielectric structure, and each feeding probe is bent onto and attached to a surface of the dielectric structure. The RF device further comprises a planar array of one or more radiators arranged on the surface of the dielectric structure. Each radiator is coupled to one or two of the feeding probes.

The utility model relates to a wire rod detection device, in particular to a self-detection device for rapidly detecting the bending degree of a wire rod. The device comprises a bending alarm, a belt ring plate and a loop plate, the belt ring plate comprises a first plate body, a conductive positioning ring and a first elastic connecting structure; a first through hole is formed in the middle of the first plate body; a first conductive strip is arranged on the wall surface of the first through hole; first conducting strips are annularly distributed on the periphery of the positioning ring; the loop plate comprises a second plate body of which the middle part is provided with a second through hole, and a soft conductive probe extending into the second through hole; the positioning ring is arranged in the first through hole through a first elastic connecting structure, the first conductive strip and the soft conductive probe are electrically connected with the two electrodes of an external power source respectively, and the bending alarm is connected into the conductive loop. The device is simple in structure, good in stability, cheap and easily available in parts, convenient to operate and capable of accurately and efficiently detecting and feeding back the bending degree of the wire rod, real-time monitoring of the bending degree of the wire rod is achieved, the detection efficiency can be effectively improved, and the product quality is improved.

The utility model relates to the technical field of antennas, and discloses a simple dual-frequency antenna, which comprises an antenna reflector, four feed probes are fixedly arranged at the center of the upper end surface of the antenna reflector, antenna radiators are arranged at the upper ends of the outer walls of the four feed probes, each antenna radiator comprises a four-arm helical antenna, and the four-arm helical antennas are arranged in parallel. A feed network is arranged in the antenna reflector, and antenna frequency modulation branches are fixedly arranged at the front end and the rear end of the two sides of the upper end face of the antenna reflector. According to the utility model, the overall structure is simple and novel, and the antenna has the characteristics of miniaturization and wide frequency band without reducing the antenna performance.

Electrical measurement devices, systems, and methods receive user input(s) selecting an electrical element from a list of electrical elements, each electrical element of the list of electrical elements having an impedance associated therewith. Impedance data of the electrical element's impedance is accessed from a data storage location. Voltage drop across an in-circuit electrical path passing through the electrical element is measured in response to a first conductive probe element of an electrical measurement device being in contact with a first terminal of the electrical element and a second conductive probe element of the electrical measurement device being in contact with a second terminal of the electrical element. Amperage of the electrical element is determined by the processor of the electrical measurement device from the voltage drop and the impedance, and a signal is transmitted to one or more indicators for indicating a status of the electrical element.

The invention provides a directional diagram reconfigurable liquid transparent antenna applied to ocean communication. The antenna is composed of a hexagonal star-shaped radiation cavity, an inverted L-shaped feed probe and a liquid ground. Through design and processing, besides a feed structure, the whole antenna realizes full transparency, has a good optical stealth effect, and has more application scenes. By utilizing the liquidity of liquid, distilled water is injected into different cavities, and the electric field distribution of the radiation cavity is changed, so that different patterns are generated. The antenna can realize a reconfigurable function of a directional diagram at 2.22-2.63 GHz, has five states of directional diagram switching modes, namely + / -15 degrees, + / -35 degrees and 0 degree, has better impedance matching and radiation directivity, and has a good optical stealth effect due to the transparent appearance.