36 results about "Coaxial probe" patented technology

The embodiment of the invention provides a stable-connection coaxial probe, and relates to the technical field of semiconductor testing, the stable-connection coaxial probe comprises a coaxial spring probe, an upper needle sleeve, a lower needle sleeve, an upper shaft block, a middle shaft block and a lower shaft block, the coaxial spring probe comprises a needle tube, a lower needle head, an upper needle head and an adjusting spring located between the upper needle head and the lower needle head, the coaxial spring probe is arranged in a sleeve assembly composed of an upper needle sleeve and a lower needle sleeve, the upper and lower needle heads of the coaxial spring probe extend out of the top end face of the upper needle sleeve and the bottom end face of the lower needle sleeve respectively, and the needle tube is in interference fit with a shaft hole of the middle shaft block. The upper end probe head and the lower end probe head of the coaxial spring probe are in clearance fit with a shaft hole of the upper shaft block and a shaft hole of the lower shaft block respectively, the middle shaft block is arranged on the combination portion of the upper probe sleeve and the lower probe sleeve, and the lower probe sleeve is provided with a telescopic sleeve which is connected with the lower probe head and prevents the lower probe head from shaking or shifting. The invention has the effect of improving the stability of the probe.

The invention relates to a microstrip patch antenna based on an antipodal double-helix groove, which comprises the antipodal double-helix groove, a patch, a substrate, a grounding plate and a coaxial probe, and is characterized in that the substrate is mounted on the grounding plate, the patch is mounted on the substrate, the antipodal double-helix groove is formed in the patch, and the coaxial probe sequentially penetrates through the grounding plate, the substrate and the patch; the coaxial probe is used for feeding the patch, and a radio frequency electromagnetic field is generated between the patch and the grounding plate. According to the microstrip patch antenna, the antipodal double-spiral grooves are formed, the path length of current flowing through the patch is increased, the resonant frequency of the antenna is reduced to a large extent, meanwhile, the good radiation characteristic is kept, the antenna radiation efficiency is high, the directional diagram is regular, and the electrical size of the microstrip patch antenna is reduced while the high radiation efficiency is kept.

The invention relates to a probe head, which comprises a probe seat, a plurality of vertical probes and a plurality of coaxial probes, the vertical probes slidably penetrate through guide holes of the probe seat, the lower ends of the vertical probes are used for contacting conductive contacts of a tested device, and each coaxial probe comprises a probe body and a tip unit arranged at the lower end of the probe body. The probe body comprises a plurality of conductors which are mutually insulated, the needle point unit comprises a first needle point and a second needle point which are electrically connected with the plurality of conductors respectively and are used for being in contact with a conductive contact of a tested device, and the plurality of coaxial probes comprise a first return probe and a second return probe which form a return probe pair and are used for being configured to be a local part of a return test path; therefore, the high-frequency loopback test requirement can be met.

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 invention discloses a miniaturized Beidou navigation antenna based on a composite material and a preparation method of the miniaturized Beidou navigation antenna. The antenna comprises a radiation patch, a composite dielectric substrate, a metal grounding plate and a feed structure which are sequentially stacked from top to bottom, the dielectric constant epsilon r of the composite dielectric substrate is 6.1, and the dielectric loss angle tangent tan delta is 0.012; the radiation patch is arranged on the upper surface of the composite dielectric substrate, a main body of the radiation patch is of a square sheet structure, twelve cutting grooves are uniformly formed in four edges of the radiation patch, each edge comprises a first cutting groove located in the middle and second cutting grooves located in the two sides of the first cutting groove, and a corner cutting structure is further arranged in the diagonal direction of the radiation patch; the feed structure comprises a coaxial probe and an SMA adapter, and the coaxial probe penetrates from the back surface of the metal grounding plate and is connected with the radiation patch after penetrating through the composite dielectric substrate; and the radiation patch is provided with a feeding point at a position deviating from the geometric center along the y-axis direction. The antenna is compact in structure, reliable in performance and good in environmental adaptability.

The application discloses a dielectric constant measurement method based on an open coaxial probe and a neural network, and specifically comprises the following steps: calculating a data set 1 of complex dielectric constants in a target range, and calculating a data set 2 of reflection coefficients corresponding to different sample thicknesses; dividing the data set 1 and the data set 2 obtained in step 1 into a training set and a test set; training an F-NN network with the data set 1 as output and the data set 2 as input, and saving the network with the best training and test effect; training an ID-NN network with the data set 2 as output and the data set 1 as input, and bringing the network into the F-NN network trained in step 3, and saving the network with the best training and test effect; and bringing a to-be-measured solution into the ID-NN network obtained in step 4 after measurement and calibration, so that the corresponding dielectric constant can be obtained. The application can quickly and accurately measure the relative complex dielectric constant of a to-be-measured object, the method is flexible to realize, and is suitable for measuring the dielectric coefficients of various substances.

The invention relates to the technical field of radio frequency microwave circuits, and discloses a hybrid integrated millimeter wave coaxial radial triplexer, which comprises a first coaxial line, a dielectric substrate, three output circuits arranged on the dielectric substrate and a second coaxial line, and is characterized in that each output circuit comprises a coaxial probe, an arc strip line and a width abrupt change strip line which are connected in sequence, and at least one gap structure is arranged on the arc strip line. According to the invention, the concentric arc strip line which is only used for excitation signal transmission is arranged in the first coaxial line, and a circuit mode which can realize a band-pass filter structure is designed on the arc strip line, so that the signal excited and coupled by the coaxial probe is transmitted through the arc strip line, and the signal transmission efficiency is improved. According to the utility model, three paths of signals with different specific frequency bands can be respectively transmitted to the standard microstrip line connected to the outer side of the first coaxial line, which can effectively improve the problems of large design difficulty and design workload of a common port impedance matching network in the design of a traditional circuit structure mode.

The invention relates to a substrate integrated waveguide resonant cavity based on a spiral groove-shaped metasurface unit, which comprises through holes, the spiral groove-shaped metasurface unit, a coaxial probe, a top plate, a dielectric substrate and a grounding plate, the top plate, the dielectric substrate and the grounding plate are sequentially superposed from top to bottom, and the through holes penetrate through the top plate, the dielectric substrate and the grounding plate and are uniformly arranged along the edge of the top plate; the coaxial probe is arranged on the top plate, the dielectric substrate and the grounding plate in a penetrating mode, and the spiral groove-shaped metasurface units are periodically arranged on the top plate. The spiral groove-shaped metasurface units are periodically arranged on the top plate, so that the resonant cavity achieves the miniaturization effect of electric size reduction under the condition that the resonant cavity does not depend on a high-dielectric-constant dielectric substrate. The super-structure surface structure is formed by a conventional etching process, the manufacturing process is simple, and the cost is low; and in cooperation with a coaxial probe feeding mode, the structure is compact, and implementation is easy.

This invention relates to the field of antenna technology, and discloses a power-tolerant gain-improving phased array antenna element to meet the technical requirements of high-power phased array antenna systems for transmitting elements. The antenna element of this invention includes a coaxial probe, a metal ground plane, a main radiator, side radiators, an L-shaped platform, and a metal director. The metal director and the metal ground plane are connected by support columns. The metal ground plane adopts a truncated pyramidal symmetrical structure with grooves, and each edge has evenly distributed circular grooves to improve the isolation between array elements. Through holes are provided within the grooves for fixing the contact components on both sides of the metal ground plane. The main radiator and the side radiators are mirror images of each other with the metal probe as the center and have a lateral gradient section at the top. The top of the L-shaped platform forms a level plate with the main radiator. The common level surface of the tops of the L-shaped platform, the main radiator, and the side radiators is parallel to the front and back surfaces of the metal director and maintains a gap.

The embodiment of the invention provides an anti-fouling coaxial probe, and relates to the technical field of semiconductor testing devices, the anti-fouling coaxial probe comprises a coaxial spring probe body, an upper needle sleeve, a lower needle sleeve, an upper shaft block, a middle shaft block and a lower shaft block, the coaxial spring probe body comprises a needle tube, a lower needle head, an upper needle head and an adjusting spring located between the upper needle head and the lower needle head, the device further comprises an integrated dynamic cleaning device. The dynamic cleaning device comprises a sealing protective cover capable of stretching and retracting in the axial direction, the upper end of the sealing protective cover is fixed to the bottom of the lower needle sleeve, and the lower end of the sealing protective cover is connected to the lower needle head, so that the lower needle head, the lower end of the lower needle sleeve and the sealing protective cover jointly form a relatively-closed dynamic cavity. And a cleaning assembly for purging and cleaning the exposed surface of the lower needle head by using the air pressure change in the compression and extension process of the sealing protective cover is arranged on the sealing protective cover. The self-cleaning device has the effects of dynamically keeping self-cleaning online and preventing pollutant accumulation.

The invention belongs to the related technical field of online monitoring of the curing and forming process of polymer bonded explosive, and discloses a device and method for online measurement of the curing and forming process of polymer bonded explosive, and the device comprises a coaxial probe, a dielectric property measurement module and a curing degree online measurement and calculation module which are connected in sequence; the coaxial probe comprises an electrode, an insulating layer and a shielding layer which are coaxially arranged from inside to outside, and the electrode is located in the middle of the coaxial probe and forms an electric field loop with the shielding layer; the dielectric property measurement module is used for detecting the dielectric constant of the polymer bonded explosive at the corresponding position; and the curing degree online measurement and calculation module is used for calculating the curing degree of the polymer bonded explosive corresponding to the measurement position of the coaxial probe in real time. The device can realize on-line measurement of the PBX curing forming process, is suitable for directly measuring the curing degrees of different spatial positions under the actual curing forming working condition, is stable and convenient in measurement, is high in anti-interference capability, and is very suitable for industrial large-scale preparation and actual working condition application.

The application relates to a metalized high-power logarithmic periodic antenna unit and array, and belongs to the technical field of microwave antennas. The antenna unit comprises a feeding coaxial probe, a feeding connection copper block, a metal feeding line and a metal logarithmic periodic dipole structure; the antenna as a whole adopts a full-metal structure without a dielectric plate, and the feeding mode adopts the metal feeding line taking air as the medium, so that the heat dissipation capacity and power capacity of the antenna are improved; the lengths of the antenna dipoles gradually increase from high to low, the dipole arms are folded inwards by 45 degrees with the set line as the central axis in the vertical plane, finally all the dipoles are located on two mutually perpendicular planes, and on the basis of the bottom several groups of dipole arms, the dipole arms are further bent by 90 degrees twice in the vertical direction to form C-shaped dipole arms; the structure effectively reduces the transverse size of the antenna unit, the coupling current between the array elements in the antenna array can be utilized to expand the antenna bandwidth to the low frequency. The application has the advantages of large antenna power capacity, small antenna unit and the like.

The application relates to the field of antennas and provides a microstrip patch antenna and a manufacturing method, wherein the microstrip patch antenna comprises a substrate, a metal ground plate, a radiation patch, an E-shaped branch, a coaxial probe and a coaxial connector; the metal ground plate is arranged on the lower surface of the substrate; the radiation patch is arranged on the upper surface of the substrate; a groove is formed in the radiation patch, the E-shaped branch is placed in the groove, and the E-shaped branch and the radiation patch are located on the same layer; the coaxial connector is arranged on the lower surface of the substrate, the outer conductor of the coaxial connector is connected with the metal ground plate, and the inner conductor of the coaxial connector is connected with the E-shaped branch through the coaxial probe. The microstrip patch antenna provided by the application has a small feeding structure area and can realize dual polarization on a single radiation patch.

The invention discloses a high-selectivity broadband three-mode filtering microstrip patch antenna based on a snakelike slot. The antenna comprises a single-layer dielectric substrate, a square microstrip patch arranged on the upper surface of the substrate, and a grounding plate arranged on the lower surface of the substrate. The microstrip patch is fed through the coaxial probe; two snakelike slots with identical sizes are respectively etched on radiation edges on two sides of the patch, the two slots on the same side are symmetrically distributed on two sides of a feed axis, and the slots on the radiation edges on the two sides are mutually symmetrical in position and opposite in bending direction. Three resonance modes with similar radiation characteristics are excited in a passband by loading the symmetrical snakelike slots, and a radiation zero point is generated on each of the two sides of the passband, so that broadband response, stable radiation, high frequency selectivity and high out-of-band rejection are realized. Compared with a traditional square microstrip patch antenna, the square microstrip patch antenna has wider bandwidth and better frequency selectivity and out-of-band rejection capability under similar sizes, and has structural and performance advantages.

The application discloses a Ka-band conical beam antenna, which is composed of a single-layer metal floor, a coaxial probe, a single-layer dielectric substrate and an antenna patch array. The single-layer metal floor is rectangular, a metal through hole is arranged at the center of the floor, an SMA joint is arranged at the bottom of the floor, the SMA joint is in contact with the floor and is connected with the coaxial probe. The upper layer of the dielectric substrate is the antenna patch array. The whole antenna is composed of eight impedance-matched antenna patch units on the dielectric substrate to form a Chinese character-shaped pattern. Each patch unit is composed of a rectangular microstrip antenna, a parasitic capacitance ring, a transmission microstrip line and an impedance-matching microstrip line. The antenna is connected with a signal from the SMA joint through the coaxial probe penetrating through the single-layer dielectric substrate and the single-layer metal floor. The application can realize the design requirements of a wide beam, high gain and low side lobe.

The application discloses an L frequency band self-tracking feed source network adopting coaxial feed, and belongs to the technical field of satellite communication microwave antennas; the L frequency band receiving signal is transmitted along the axial direction of a shaped metal outer wall, eight stepped coaxial probes are symmetrically distributed along the axial direction of a dielectric rod at an angle of 45 degrees, one end of each of the coaxial probes is inserted into the shaped metal outer wall, and the other end of each of the coaxial probes is connected with a difference signal polarization synthesis network through a cable, the difference signal polarization synthesis network outputs two L frequency band TE21 mode circular polarization signals, four mushroom-shaped coaxial probes are symmetrically distributed along the axial direction of the dielectric rod at an angle of 90 degrees, one end of each of the coaxial probes is inserted into the shaped metal outer wall, and the other end of each of the coaxial probes is connected with a sum signal polarization synthesis network through a cable, and the sum signal polarization synthesis network outputs two L frequency band circular polarization signals. The shaped metal outer wall provides support for the coaxial probes. The application has the advantages of small volume, light weight, no need of debugging, large amount of manpower cost saved, and suitability for engineering promotion.

The application discloses a kind of bipolarization metasurface antennas based on subwavelength patch, belong to wireless communication technical field from bottom to top sequentially layering setting coaxial probe, metal floor, balanced feed balun, metal feed line, dielectric substrate and subwavelength grid patch;Two balanced feed baluns are perpendicular to each other, and are vertically placed on the metal floor;Metal feed line is composed of four L-shaped feed lines, to make the current in vertical direction and horizontal direction pass through vector superposition and form the current of ±45 ° direction;Subwavelength grid patch is composed of twenty-five small patches with 5x5 array;Dielectric substrate is placed on balanced feed balun, subwavelength grid patch is printed on the upper surface of dielectric substrate, and metal feed line is printed on the lower surface of dielectric substrate 5;The profile height of the metasurface antenna of the application is 8.4mm, and the antenna can work at 3.4-4.1GHz, and has stable radiation performance.

The invention discloses a coaxial probe for testing a high-frequency PCB (Printed Circuit Board), which comprises a large needle tube, one end of the large needle tube is connected with a connector, the other end of the large needle tube is connected with an inner conductor probe and an outer conductor shell, and the outer conductor shell is positioned outside the inner conductor probe; and an insulating support body is filled between the outer conductor shell and the inner conductor probe. The problems of high-frequency impedance matching, contact stability, service life and operation convenience in the prior art are solved.

The invention discloses a dual-frequency decoupling patch antenna loaded with a short-circuit stub. The dual-frequency decoupling patch antenna comprises a top metal layer, a dielectric substrate, a bottom metal layer and a coaxial probe feed structure, the top metal layer is provided with at least two rectangular metal patch units arranged along the same direction, each patch unit is provided with a double-frequency slot, short-circuit stubs consisting of metal strips and metalized through holes are symmetrically loaded on two sides, and the metalized through holes penetrate through the dielectric substrate and are electrically connected with the bottom metal layer. After the signal is injected, the patch unit excites the quasi TM10 mode radiation at the double frequency points, and the short-circuit stub line enables the feed port of the coupling patch to form a weak field area, thereby achieving the dual-band mutual coupling suppression and directional diagram decoupling. The antenna is simple in structure and low in profile, a linear array can be formed, coupling of adjacent and non-adjacent units is effectively reduced, and the radiation performance of the antenna is improved.

The invention relates to a bandwidth-controllable double-frequency circular microstrip patch antenna, which comprises a dielectric substrate with a low dielectric constant and low loss, a grounding plate covering a metal layer on the bottom surface of the dielectric substrate, and a circular metal main radiation patch arranged at the circle center position of the top surface of the dielectric substrate, a first group of parasitic patches and a second group of parasitic patches are arranged around the periphery of the main radiation patch; the feed structure adopts a coaxial probe for feeding; the radius of the main radiation patch resonates in a TM11 mode and a TM01 mode at the same time and corresponds to a first frequency band and a second frequency band respectively. According to the invention, the TM11 and TM01 modes of the circular patch are ingeniously excited through a single feed point, dual-band work is realized, omnidirectional coverage is provided, and the requirements of communication between the unmanned aerial vehicle and a ground station in different directions are met.

The invention discloses a low-profile single-layer broadband microstrip patch antenna, equipment and a radar detection system, and relates to the technical field of antennas. The driving patch is arranged on the dielectric substrate and is fed through the coaxial probe; the two parasitic patches are symmetrically arranged on the two sides of the driving patch; the two symmetrical coupling branches are led out from the open circuit end of the driving patch and are capacitively coupled to the two parasitic patches respectively; wherein the working wavelength of the driving patch and the parasitic patch is configured to be a half waveguide wavelength, dual-mode excitation is realized through capacitive coupling of the coupling branch knot, and a broadband antenna structure is formed. The two coupling branches are led out near the open circuit end of the driving patch to be in capacitive coupling with the left parasitic patch and the right parasitic patch respectively, the parasitic patches are symmetrically arranged, inductive impedance of the driving patch can be compensated, accordingly, resonant frequencies of the driving patch and the parasitic patches are debugged together, and the driving patch and the parasitic patches form a broadband in a dual-mode mode.

The invention discloses a single-layer differential dual-polarization metasurface broadband filtering antenna, and belongs to the field of microwave communication. The antenna comprises a dielectric substrate, an n * n metasurface patch array located on the upper surface of the dielectric substrate, and a metal grounding layer located on the lower surface of the dielectric substrate. Wherein n is an odd number greater than or equal to 3. And a cross seam is etched on the central patch of the metasurface patch array. The upper, lower, left and right directions of the central patch are respectively provided with a metalized through hole pair, and the metalized through hole pairs are used for electrically connecting the patches with the metal grounding layer. Four corners of the metasurface patch array are respectively connected with a coaxial probe to form two pairs of orthogonally arranged differential excitation ports. And the sizes of the four patches where the coaxial probes are located are smaller than those of the other patches. The antenna structure has the outstanding characteristics of single-layer integration, simple design, broadband operation, high port isolation, low cross polarization and built-in filtering function.

This invention discloses a broadband millimeter-wave four-ridged horn probe, which mainly solves the problems of narrow bandwidth and poor pattern symmetry of existing high-frequency probes. It includes a horn housing (1), four ridges (2), a waveguide back cavity (4), two coaxial probes (5), and a short-circuit plate (8). The ridges are fixed in the waveguide back cavity. The two coaxial probes pass through the air cavities of the first and second ridges respectively, extending into the corresponding third and fourth ridges, forming an orthogonal staggered arrangement of the two coaxial probes. The opening of the horn housing adopts a square structure at the break point, and the horn wall has multiple adjacent gaps with unequal spacing (6). Each of the four ridges has an exponentially modulated slot (3) on its ridge near the arc portion. The end of each ridge extends to the feed port and connects to the straight waveguide, and adopts a pyramidal structure (7) with chamfered corners. This invention has a wide bandwidth, good dual-polarization performance, low cross-polarization, and stable pattern, and can be used for antenna measurement and electromagnetic compatibility testing.

A probe head includes a probe seat, vertical probes, and coaxial probes. The vertical probes are slidably inserted in guiding holes of the probe seat, and have lower end portions for contacting electrically conductive contacts of a device under test. The coaxial probe includes a probe main body provided from the outside to the inside thereof coaxially with an outer conductor, a dielectric layer and an inner conductor in order, and a tip unit disposed at a lower end portion of the probe main body and including first and second tips electrically connected with the outer and inner conductors respectively for contacting electrically conductive contacts of the device under test. The coaxial probes include first and second loopback probes composing a loopback probe pair for being configured as a part of a loopback test path. As a result, the present invention meets the high-frequency loopback test requirements.

The application discloses a low-profile single-layer broadband microstrip patch antenna, equipment and a radar detection system, and relates to the technical field of antennas.The technical scheme points of the application are as follows: a dielectric substrate; a driving patch arranged on the dielectric substrate and fed by a coaxial probe; two parasitic patches symmetrically arranged on the two sides of the driving patch; and two symmetric coupling branches led out from the open end of the driving patch and respectively capacitively coupled to the two parasitic patches; wherein the working wavelength of the driving patch and the parasitic patch is configured as one-half of the waveguide wavelength, the double-mode excitation is realized through the capacitive coupling of the coupling branches, and the broadband antenna structure is formed.The application leads out two coupling branches near the open end of the driving patch, respectively capacitively couples the left and right parasitic patches, and symmetrically arranges the parasitic patches, so that the inductive impedance of the driving patch can be compensated, the resonant frequencies of the driving patch and the parasitic patch are adjusted together, and the double-mode of the driving patch and the parasitic patch forms a broadband.

The invention discloses an ultra-wideband dual-polarization dielectric resonator antenna based on multimode resonance and two-stage Wilkinson differential feed. The ultra-wideband dual-polarization dielectric resonator antenna comprises a dielectric substrate, a cylindrical dielectric resonator, two pairs of coaxial probes, two groups of two-stage Wilkinson power dividers and two feed ports, the cylindrical dielectric resonator is arranged at the central position of the dielectric substrate; the two pairs of coaxial probes are symmetrically arranged in pairs along + / -x and + / -y directions by taking the center of the cylindrical dielectric resonator as an original point; and the two feed ports are respectively connected with the input ends of the corresponding two-stage Wilkinson power dividers and are used for carrying out differential feed on the corresponding coaxial probes and exciting a radiation mode polarized in the x-axis direction and a radiation mode polarized in the y-axis direction and orthogonal to the radiation mode. According to the invention, a dual-polarization radiation mode with a compact structure, a wide band and low coupling is realized, each polarization further increases the bandwidth by exciting a plurality of resonant modes with close frequency points, and low coupling is realized through differential feed and medium regulation field valley composite decoupling.

The invention discloses a dual-frequency MIMO mutual coupling removal patch antenna based on a rectangular groove, and belongs to the technical field of antennas for wireless communication. The antenna comprises a 1 * 2 symmetrical antenna unit array which is composed of a top metal layer, a dielectric substrate, a bottom metal layer and a coaxial probe in sequence. Double-frequency rectangular grooves are etched in the upper edges and the lower edges of the two side-by-side rectangular metal patches on the top layer, decoupling rectangular grooves are formed in the two sides of the upper portions of the rectangular metal patches, the decoupling rectangular grooves are formed between the double-frequency rectangular grooves and the feed port, and the coaxial probe penetrates through the substrate and is connected with the patches to form the feed port. Dual-band resonance is achieved through the dual-band rectangular groove, a weak field area is synchronously formed in dual bands through the decoupling rectangular groove to achieve mutual coupling removal of the antenna units, a radiation pattern is corrected at the same time, and the isolation degree and radiation performance of an antenna port are improved on the premise that the patch size is not increased and the low profile is kept; and a new antenna solution is provided for a high-performance wireless communication system.

The present application relates to lithium battery production equipment and testing technical field, specifically to a kind of multifunctional current collection device for lithium battery formation process and method thereof;It contains insulating base, lifting cylinder, laminated flow guide plate, coaxial probe and controller;Laminated flow guide plate is made of red copper negative electrode row, insulating film and voltage sampling plate in turn and is stacked, and the outer tube current needle and the inner core voltage needle of coaxial probe are respectively connected with corresponding plate layer;The present application also provides a control method, calculates initial contact resistance by injecting test current, converts dynamic contact resistance according to sustained formation current and temperature rise slope;When dynamic contact resistance is out of limit, preferentially control cylinder to increase downstroke to carry out mechanical pressure compensation, if not recovered, reduce formation;The present application discards separate wire harness, greatly improves the convenience of disassembly and maintenance, and realizes early capture and fast dynamic adjustment to contact deterioration trend.

The application discloses a compact dual circularly polarized co-feed transmitting and receiving antenna, which comprises a dielectric substrate, a coaxial probe and a coaxial line. The application utilizes a rectangular groove to make two coaxial ports form a right-handed circularly polarized transmitting and a left-handed circularly polarized receiving, but the coupling of the transmitting and receiving ports is very strong at this time. Through the analysis of the electric field, the phase relationship of the orthogonal electric field is changed, the arc-shaped groove is utilized to change the phase, the energy addition of the orthogonal electric field is changed into subtraction, and thus the coupling of the transmitting antenna and the receiving antenna is reduced. The transmitting function and the receiving function of the dual circularly polarized co-feed transmitting and receiving antenna share the same microstrip patch antenna unit, the required components are integrated on a layer of dielectric substrate, and the application has the advantages of low profile, small size and low cost.

This invention discloses a liquid dielectric rod antenna with reconfigurable polarization, comprising an antenna housing, a metal waveguide, a loading container, an RF coaxial probe, and a metal cylinder. The antenna housing is mounted on the metal waveguide, with helical first to third channels arranged along its axis. The loading container has excitation channels passing through its two sides and sealed to the container. The metal waveguide encloses the loading container and has mounting holes communicating with the excitation channels. The inner conductor of the RF coaxial probe extends into the excitation channels and connects to the metal cylinder. The loading container is filled with dimethyl silicone oil. When tetrahydrofuran is injected into the first channel, the dielectric rod antenna operates in circular polarization mode; when tetrahydrofuran is injected into the first to third channels simultaneously, the dielectric rod antenna operates in linear polarization mode. This invention solves the problem that traditional dielectric rod antennas can only operate in a single polarization mode, and has great potential in future wireless communications.