326 results about "SMA connector" patented technology

The invention provides a Ku / Ka frequency band circularly polarization integrated receiving and transmitting feed source antenna applied to antenna systems, such as a paraboloid antenna and the like, in satellite communication. The antenna adopts a coaxial nested compact structure, and is applied to Ku frequency band and Ka frequency band at the same time. The basic structure of a feed source comprises a circular waveguide, on which a pointed cone shaped dielectric rod is loaded, a flange, a coaxial waveguide, a symmetrical SMA connector pair, a circular polarizer and an orthogonal mode coupler, wherein the feed source in the Ka frequency band is applied to dual circular polarization, has rotary symmetrical radiation directional diagrams, the circularly polarization axial ratio in Ka double band is smaller than minus 2dB, and the transmitter-receiver isolation is smaller than minus 70dB; and the feed source in the Ku frequency band is applied to dual circular polarization, has rotary symmetrical radiation directional diagrams, a cross polarization level smaller than minus 40dB, and good transmitter-receiver isolation and reflection loss.

The invention provides a foundation-based atmosphere profile microwave detector. The detector is characterized by comprising an antenna feeder unit, a radiometer receiving unit and a scanning mechanism unit, wherein the antenna feeder unit comprises two independent antenna feeder sub-units for two wavebands and is provided with two-frequency independent reflective surfaces; the two independent antenna reflective surfaces are arranged at two ends of the output shaft of a scanning motor respectively, can realize beam scanning through motor rotation, and are used for receiving microwave radiation of atmosphere and an internal calibration reference source; the radiometer receiving unit comprises a directional coupler, a radio amplifier, a power divider, a band pass filter, a square law detector, an integrator and a video amplifier, and is used for realizing intermediate frequency detection of a received signal; the scanning mechanism unit comprises a scanning shaft, a scanning step motor, two front ends and a sub-miniature type A (SMA) connector; and driven by the scanning motor, the scanning shaft drives the two reflective surfaces to circumferentially scan so as to realize observation on sky in different incident angles and measurement on an internal calibration blackbody and acquire data which is acquired in a measurement and periodic internal calibration unit.

The invention provides a circular polarization broadband helical antenna, and aims at solving the problem that a current helical antenna is degraded at the high and low frequency ends. The circular polarization broadband helical antenna comprises an antenna cover (1), an antenna radiation device (2), wave-absorbing materials (3), a reflection cavity device (4) and a balance-feed device (5). The reflection cavity device (4) is formed by a reflection cavity (41) and a base (42). The reflection cavity (41) is filled with the wave-absorbing materials (3). The antenna radiation device (2) is arranged on the opening face of the reflection cavity (41). A double-arm spiral radiating body (22) is formed by smooth connecting of an inner circular double-arm standard equiangular spiral which is variable in duty ratio and periphery double-arm standard Archimedes spiral. The standard equiangular spiral is on one fifth of the total number of coils. The balance-feed device (5) is arranged on the base (42). The bottom end is connected with an SMA connector. The top end is connected with the start end of the double-arm spiral radiating body (22). The circular polarization broadband helical antenna has the advantages of being stable in performance of full-frequency band, and can be used for the fields of broadband communication and broadband spectral analysis.

The invention discloses a microband antenna with all-directional radiation, comprising: a medium substrate; a radiation metal pad with microband seam and a metal earthing board, respectively printed on two sides of the medium substrate; at least a metal via connecting the metal earthing board with the radiation metal pad through the medium substrate; a SMA connector, connecting the radiation metal pad with the metal earthing board and used as feed-in interface of antenna electric wave signals. And its advantages: it has low section, and can be conformal with the carrier; at a certain frequency, it has a characteristic of all-directional radiation in horizontal; and has vertical linear electric field polarization and low cross-polarization level.

The invention discloses a broadband dual-polarized printed dipole antenna capable of integrating balun feeds. The broadband dual-polarized printed dipole antenna comprises a metal baffle board and two pairs of dual-layer printed dipole antenna units. Each pair of dual-layer printed dipole antenna units comprises an SMA connector and two medium plates. T-type short circuit oscillator structures are added to the top ends of two arms of a radiation patch unit respectively, and therefore the broadband can be widened. The antenna is composed of two dual-layer patch structures in a cross mode, a trapezoid bent structure is adopted for the bottom of a feed balun, therefore, the isolation degree of a twin port is improved, and the antenna is convenient to assemble. The measured result shows that the bandwidth of two ports, with the VSWR< / =2, of the antenna reaches 66.7%, namely, the bandwidth ranges from 1.65GHz to 3.3 GHz, the isolation degree in the broadband is larger than 25dB, and the gain in the broadband ranges from 4.1dBi to 8.3dBi. The broadband dual-polarized printed dipole antenna has the advantages of being wide in frequency bandwidth, small in size, low in profile, simple in structure and light in weight, meets the current design requirements for the miniaturization and the broadband, and can be applied to 2G / 3G / 4G(LTE) communication standard networks such as WCDMA and TD-CDMA.

The invention provides a directional diagram reconfigurable wind-angle scanning antenna based on a SSPP structure. The antenna comprises a coplanar waveguide structure formed by two quasi-trapezoidalmetal sheets and a segment of elongated metal lead together, symmetrical zigzag SSPP metal transmission lines, a feed selection structure formed by two paths of metal lines on which three switches arewelded, a quadrilateral metal modulation unit, an end gradient zigzag structure and an SMA connector. The SMA connector is arranged on the center of the short side of the antenna dielectric plate andused for performing radio frequency excitation for the antenna. The SMA connector is welded on one side of the coplanar waveguide structure, and one side of the coplanar waveguide structure is accessed to the feed selection structure. The feed selection structure is controlled by three changeover switches and used for selecting the current line feeding in the symmetrical zigzag SSPP metal transmission lines from the coplanar waveguide structure. The quadrilateral metal is arranged on the symmetrical zigzag SSPP metal transmission lines. The end gradient zigzag structure is used for improvingthe bandwidth and the end-fire capacity of the antenna. The problem that the present frequency scanning antenna has difficulty to realize wide-angle scanning can be solved.

The invention relates to the field of communication equipment manufacturing. An electronic antenna full automatic assembling method sequentially comprises the following steps that rotation piece feeding is conducted, specifically, a rotation piece is fed to a first rotary disc device through a rotation piece feeding device; an antenna core and an sma connector are assembled into a core body, specifically, the antenna core and the sma connector are fed and assembled through an antenna core feeding transferring device and an sma connector feeding assembling device, the connector is fixed, and the antenna core is inserted into the connector; the rotation piece and the core body are pressed, specifically, pressing is conducted through a pressing device; copper sheet assembling is conducted, specifically, a carrying device carries a product into a copper sheet pressing device to be assembled; and protection bar assembling is conducted, specifically, a protection bar is fed by an antenna protection bar feeding device, and then, final product assembling is conducted through a protection bar assembling device. An electronic antenna full automatic assembling production system adopted the technical scheme is high in automation degree, working efficiency and finished product percent of pass.

The invention relates to a broadband dielectric resonator antenna based on planar monopole patch excitation, comprising a cylindrical dielectric resonator with a gap, a support foam material, a planar monopole patch, a square metal floor and a feeding SMA connector. The radiation body of the antenna is the cylindrical dielectric resonator with a gap, the top surface is loaded with a metal coating, and the inverted trapezoidal planar monopole patch is adopted for excitation. The dielectric resonator is placed on the metal floor. The foam material of which the dielectric constant is close to 1.0 is used to support the dielectric resonator. The antenna has the advantages of compact and reliable structure, low cost, low processing difficulty and high radiation efficiency, can meet the performance requirement of the working band from 3GHz to 6.5GHz, and is very suitable for a C-band broadband wireless communication system.

The wrench adaptor of this invention provides an easy and convenient tool for connection and disconnection of the SMA connections in constrained spaces while allowing use of a standard torque wrench or just fingers. The channel design of the wrench adaptor, accommodating the cable and the protective sleeve therefor, allows access to SMA connectors without bending or disturbing semi-rigid or rigid cables. The wrench adaptor is shown in two embodiments—a single-ended and a double-ended form. The adaptor facilitates access to the hexagonal nut at the panel of an RF device which is mounted to a threaded stud and offsets the wrench application to a location away from the panel. As many of the RF cables have crimped or soldered portions adjacent or within the connector, provision is made in the adaptor by way of a hollow semicylindrical form to cradle the semi-rigid or rigid cable.

An antenna assembly is designed to operate over a wide band from around 880 MHz to around 2,500 MHz by means of a monopole antenna element designed to operate from around 880 MHz to around 2,500 MHz typically from the GSM bands to the Bluetooth or IEEE 802.11b band. The operation band width of the assembly is increased by the provision of a conductive member located on a reverse side of the supporting substrate of the antenna. In one embodiment the conductive member is a standard panel mount SMA connector. The assembly is able to provide wireless operation in multiple frequency bands, not previously possible in a practical manner.

Access to the XAUI lanes of a 10 Gigabit Ethernet device is provided when needed for testing of the XAUI electrical interface. Access is provided by extending the XAUI interface contained in a XENPAK interface connector. An embodiment of the present invention uses an extension of the XENPAK connector to generate and receive XAUI signals thus making it possible for any device with a XENPAK connector to become a XUAI tester with minimal components between the test equipment and the device under test. The reduction of components (only an AC-Coupling capacitor resides between the XENPAK connector and the SMA connector) results in significant reduction in insertion loss and signal degradation. Also, the availability of any device with a XENPAK interface as a XAUI tester eliminates any requirement for specialized test equipments. The XAUI Extender card fits in the slot in the test equipment that would normally house the XENPAK module. Thus, no special connector is required to configure a device as a test equipment of the present invention.

The invention discloses an ultra-high-frequency sensor for monitoring partial discharge in a switch cabinet online. The ultra-high-frequency sensor comprises a micro-strip slot antenna and an SMA (Sub-Miniature A) connector, wherein the micro-strip slot antenna comprises a dielectric substrate, wherein a grooved metal grounding plate is arranged on one side of the dielectric substrate, and the micro-strip slot antenna is arranged on the opposite side of the dielectric substrate; the SMA connector is electrically connected with the micro-strip slot antenna. From an overall perspective, the shape of the groove in the metal grounding plate is an inverted U shape; a detail design adopts a meander technology, and the path of exciting current on the surface of the metal grounding plate is changed by bending, so that the miniaturization of an antenna is realized. In application, the ultra-high-frequency sensor is light in weight, small in size and easy to manufacture, and is beneficial to be arranged in the switch cabinet; meanwhile, the sensitivity is high; a feed structure is simple and compact; the loss of a feed line is low. Simulation and experiments prove that the return loss of the sensor in a bandwidth range is less than -10 dB; in addition, the impedance matching with a standard 50-Ohm coaxial transmission line is effectively realized by optimizing micro-strip feed line parameters and feed positions.

The invention relates to an insulator surface electric charge online measuring probe and a measuring method of the insulator surface electric charge online measuring probe. The probe comprises an SMA connector, a shielding part, a coaxial cable and an electrometer. The SMA connector is connected with the coaxial cable through the shielding part. The coaxial cable is connected with the electrometer. The method includes the following steps that firstly, the probe is installed and forms a capacitor C2 with the tested electric charge; secondly, the input voltage U1 is regulated and the output voltage U2 is recorded; thirdly, a change relation curve between the U1 and the U2 is recorded; fourthly, as a C1 is 113pF, a C2 is calculated out through the formula in the specifications; fifthly, capacitance equivalent area A is calculated out through a capacitance computing formula with the C2; sixthly, sensitivity S is calculated out through a formula S=C1 / A; seventhly, the charge density is calculated out through a formula that sigma equals to SU2. By means of the insulator surface electric charge measuring method, the safety state of the GIS can be effectively estimated and the method has a major significance in safe operation of the GIS.

The invention discloses a microstrip patch antenna based on a photonic crystal structure. The microstrip patch antenna comprises a dielectric substrate, wherein a metal grounding layer is arranged on the back side of the dielectric substrate; radiation branch nodes are arranged in the center of the front side of the dielectric substrate; the radiation branch nodes are of a four-helical structure in mirror symmetry; a photonic crystal forbidden band layer surrounds the radiation branch nodes; the photonic crystal forbidden band layer consists of a plurality of metal patches which are arranged in a periodic manner; the centers of the metal patches are connected with the metal grounding layer through conductive through holes; the metal grounding layer is connected with the radiation branch nodes through feed ports; signal transmission between the end parts of the feed ports and the outside can be achieved through SMA connectors. As the photonic crystal forbidden band layer is introduced around the radiation branch nodes, the defects that a microstrip patch antenna is low in gain and narrow in bandwidth are effectively solved, and moreover as the photonic crystal forbidden band layer is in certain distance from the radiation branch nodes, the mutual coupling is reduced, and the working property of the antenna is effectively ensured; in addition, due to the structure of the radiation branch nodes, current paths can be effectively increased, and the antenna can be minimized.

The application relates to an electromagnetic field composite probe and a detection system. The electromagnetic field composite probe comprises a first SMA connector, a second SMA connector and a PCBboard, wherein the PCB board comprises a signal transmission portion and an electromagnetic field probe; the electromagnetic field probe is electrically connected to one end of the first SMA connectorand one end of the second SMA connector through the signal transmission portion, and the other end of the SMA connector and the other end of the second SMA connector are used to connect an analysis device; the electromagnetic field probe detects the electromagnetic field of the circuit board to be tested to obtain a radio frequency signal, and transmits the radio frequency signal to the analysisdevice to analyse and obtain an electric field parameter and a magnetic field parameter by sequentially pass through the signal transmission portion and the first SMA connector, and the signal transmission portion and the second SMA connector. According to the electromagnetic field composite probe and the detection system, the measurement of the electric field and the magnetic field at the same point can be realized, and the detection efficiency is high, the problem of detecting the mutual interference of the double physical quantity caused by adopting different detection structures can be avoided, and the accuracy is high.

The invention discloses a broadband directional circularly polarized antenna applied in a wireless communication system. The broadband directional circularly polarized antenna comprises a dielectric substrate, a metal back cavity and a metal floor; upper and lower surfaces of the dielectric substrate have fan-shaped symmetrical dipole metallic patches; rotation parasitic metallic patches are distributed between the fan-shaped symmetrical dipole metallic patches; the fan-shaped symmetrical dipole metallic patches and the rotation parasitic metallic patches are symmetrically distributed around the center; the fan-shaped symmetrical dipole metallic patches and the rotation parasitic metallic patches rotate 90 degrees around the center in order; phase shifting rings of the connected fan-shapedsymmetrical dipole metallic patches on the upper and lower surfaces of the dielectric substrate are connected to an inner core and an outer sheath of a coaxial line; and the coaxial line passes through the floor and is connected with an SMA connector. The invention is simple in structure, is easy to process, and has wide axial ratio bandwidth and impedance bandwidth; a directional diagram is relatively stable in the common frequency band, so that the broadband directional circularly polarized antenna can be used for a wide-band wireless communication system and can reduce the antenna complexity of the communication system.

The invention provides a vertical polarization omni-directional antenna based on a spoof surface plasmon polariton structure. The vertical polarization omni-directional antenna comprises a monopole excitation structure (1), single-sided / double-sided sawtooth-shaped SSPPs transmission radiation structures (2), a limited floor (3), and an SMA connector, wherein the SMA connector is used for carryingout radio frequency excitation on a monopole antenna, namely the monopole excitation structure (1); feeding of a plurality of single-sided / double-sided sawtooth-shaped SSPPs transmission radiation structures, namely the transmission radiation structures (2), is subjected to coupling feeding through the monopole antenna; and the single-sided / double-sided sawtooth-shaped SSPPs transmission radiation structures are arranged on a dielectric plate structure of the antenna. The vertical polarization omni-directional antenna solves the problem of directional diagram offset caused by low frequency band, high profile and limited ground of an existing vertical polarization omni-directional antenna.

The invention discloses a circularly polarized differential feed antenna, comprising a radiation patch on the upper surface, two L-shaped feed panels, and a horizontal substrate on the lower surface, wherein the upper radiation patch comprises a first lower radiation patch and a second upper radiation patch which are spaced by a certain distance by an isolation foam; the first radiation patch is larger than the second radiation patch, two L-shaped feed panels are directly connected with the first radiation patch in the radiation patch on the upper surface, each L-shaped feed electrode panel is respectively connected with the horizontal substrate on the lower surface and an SMA connector by a probe, and the L-shaped feed panels are excited by a pair of differential signals. The impedance bandwidth and the axial ratio bandwidth are widened and the lower-level crossed polarization and stable direction diagram and gain can be seen on the work frequency band. The scheme can be used in the more and more popular radio frequency differential circuit and system.

The invention relates to a high sensitivity near field resonant electric field test probe with a loaded T-type electrode. The test probe at least comprises a micro coaxial connector (SMA connector) and an electric field probe body, wherein the electric field probe body comprises a detection tip with the loaded T-type electrode, a resonator, an impedance transformer, a signal through hole and a coplanar waveguide CB-CPW with a metal back plate, design and manufacturing of the electric field probe body are based on the PCB process, and the four-layer board structure is employed. The test probe is advantaged in that high sensitivity, miniaturization and the high score rate are realized, useful electric field signals can be effectively extracted in the weak radiation level environment of the CPS band; the PCB processing process is employed to reduce production cost and shorten the development cycle; a more efficient and highly sensitive detection technology device is provided for interference source positioning and tracking of GPS narrowband RF electronic systems.

A module for holding a printed circuit board (PCB) includes rectangular-shaped, mating top and bottom brackets. Three walls of the top bracket retain SMA connectors that interconnect with the PCB. A dielectric gasket is provided below each SMA connector to provide pressure on the leads thereof so that the leads adequately contact corresponding pads on the PCB. Two walls of the bottom bracket include channels that slidably receive and retain the PCB therein, and another wall includes a stop channel that retains an edge portion of the PCB when the PCB is slid through the channels. The bottom bracket also has diamond-shaped pads and a square-shaped pad connected between two walls thereof that align with and support corresponding components provided on the PCB and dissipate heat generated thereby. A cable connector provided on one end of an electrical cable connects to each SMA connector, and the other ends of the electrical cables connect to testing equipment. Thus, when the top bracket is connected to the bottom bracket, the dielectric gaskets provide pressure on SMA connector leads so that the leads adequately contact corresponding pads on the PCB and enable the PCB to be tested without being permanently affixed to the module. The module may be attached to a heatsink that, in conjunction with the diamond-shaped pads and the square-shaped pad, permits heat to be dissipated from the PCB at the same rate that heat is dissipated from an installed PCB.

An antenna assembly is designed to operate over a wide band from around 880 MHz to around 2,500 MHz by means of a monopole antenna element designed to operate from around 880 MHz to around 2,500 MHz typically from the GSM bands to the Bluetooth or IEEE 802.11b band. The operation band width of the assembly is increased by the provision of a conductive member located on a reverse side of the supporting substrate of the antenna. In one embodiment the conductive member is a standard panel mount SMA connector. The assembly is able to provide wireless operation in multiple frequency bands, not previously possible in a practical manner.

The invention discloses a pseudo-random code electrical instrument. The pseudo-random code electrical instrument includes a transmitter and a receiver. The transmitter comprises a FPGA processing module, a constant current source module and an ADC data acquisition module. The FPGA processing module comprises a master control CPU and an FPGA connected with the master control CPU and used for time sequence control. The constant current source module comprises a driving circuit, a constant current power source and a standard resistor, wherein the driving circuit, the constant current power source and the standard resistor are connected in sequence. The ADC data acquisition module comprises an operational amplifier, a differential amplifier, an ADC, a two-port RAM and a DSP and further comprises a CPLD used for algorithm integration, wherein the operational amplifier, the differential amplifier, the ADC, the two-port RAM and the DSP are connected in sequence, and the CPLD is respectively connected with the ADC, the two-port RAM and the DSP. The FPGA is connected with the CPLD through a synchronous interface, and the DSP is connected with the RAM and connected to a PC upper computer through a USB controller. The receiver comprises an SMA connector, an operational amplifier, a differential amplifier, an ADC, an FPGA and a DSP and further comprises a master control CPU respectively connected with the FPGA and the DSP, wherein the SMA connector, the operational amplifier, the differential amplifier, the ADC, the FPGA and the DSP are connected in sequence, and the DSP is connected to the PC upper computer through a USB MCU module. The pseudo-random code electrical instrument is high in anti-interference performance and exploration efficiency and can adapt to complicated environments.

The invention provides a microstrip nanometer film microwave electromagnetic parameter testing apparatus, which belongs to the technical field of electromagnetic parameter testing. The apparatus is provided with a microstrip clamp, a microwave vector network analyzer, a GPIB data acquisition card, and a computer. The microstrip clamp is composed of an L-shaped base, an upper conduction band, an adjustable short circuit piece, an SMA connector, a shield cover and a fixed platform. One end of the L-shaped base is provided with a circular hole; the other a step. The two ends of the adjustable short circuit piece are provided with grooves. The SMA connector is mounted on the L-shaped base and is connected to the coaxial cable of the microwave vector network analyzer; a nanometer film sample is placed at the center position of the input end and the adjustable short circuit piece. The microstrip clamp is fixed on the fixed platform, and the four corners of the fixed platform are equipped with height adjustable supporting rods. The fixed platform is evenly engraved with a set of horizontal lines marked with scales. Two spring clamp sheets are locked on the fixed platform and are placed on the end face and the face of the microstrip clamp respectively. The apparatus can achieve precise measurement, cause no damage and is convenient to operate.

The invention discloses a clamp for measuring the antenna impedance on an ultrahigh-frequency radio frequency identification tag. The clamp is formed by a single-end SMA connector (1), coplane strip lines (2), a high-frequency transformer (3), difference dual-end probes (4) and a medium substrate (5). The threaded end of the single-end SMA connector is connected with a vector network analyzer, and the other end of the single-end SMA connector is connected with the high-frequency transformer through the coplane strip lines. The difference dual-end probes are connected with the high-frequency transformer through the coplane strip lines. The clamp is capable of transforming single-end signals at the single-end SMA connector into difference dual-end signals at the difference dual-end probes, a time-invariant relation is achieved between the voltage and the current at the two ends and is determined by the difference dual-end probes which are short circuited, disconnected and connected with a 50-ohm resistor, and thus the impedance of an antenna can be measured after the antenna is connected in. The influence of the clamp on the measurement precision is avoided, and the clamp has the advantages of being simple and fast in operation and high in precision and can be used for massively measuring the antenna impedance on the ultrahigh-frequency radio frequency identification tag.

The invention relates to a frequency-reconfigurable microstrip antenna and a switch configuration method of the frequency- reconfigurable microstrip antenna. The antenna performs electricity feed in a side feeding mode and comprises a dielectric plate and an SMA connector, a semicircular radiating unit is arranged on the upper surface of the dielectric plate, and the inner ring of the semicircular radiating unit is perpendicularly provided with a microstrip antenna body; a metal patch grounding plate is arranged on the lower surface of the dielectric plate; the metal patch grounding plate is transversely provided with a first open groove and a second open groove which are parallel with each other; a patch radio frequency switch S9 is arranged in the middle of the first open groove in a spanning mode, and the inner center of the SMA connector is connected with a microstrip feeder line; the outer surface of the SMA connector is connected with the metal patch grounding plate. The smoothing function is integrated in the frequency-reconfigurable microstrip antenna, and therefore the antenna can be used for sensing the whole frequency band and then adjusting the band width of the frequency band to select an appropriate sub-band for work. Communication under the condition of various band widths and frequency bands can be met, and the frequency-reconfigurable microstrip antenna has good application value in wireless communication.

The invention discloses an integrated structure of a nose skin antenna and a manufacturing method thereof, comprising a nose skin, an antenna microstrip, a transition plate and an SMA connector. The nose skin comprises a first skin, a second skin, a third skin and a fourth skin, wherein the first skin is positioned on one side of the transition plate, the fourth skin is positioned on the other side of the transition plate, the second skin is wrapped outside the first skin, the antenna microstrip is embedded in the first skin, the third skin is positioned on both ends of the transition plate, and the transition plate is positioned on the back surface of the antenna microstrip; the SMA connector passes through a fourth skin, a transition plate, and the antenna microstrip is welded on the antenna microstrip after the antenna microstrip is welded. The invention realizes the integrated design of the antenna microstrip and the head skin, controls the antenna shape through the shape of the head skin, effectively reduces the mounting structure weight of the antenna microstrip, realizes the fusion of the antenna microstrip and the head skin, and improves the power of the detection system.

The invention discloses a closed coaxial transmission line test system for testing dielectric property of liquid and solid materials. The closed coaxial transmission line test system comprises a test fixture, a vector network analyzer, a computer and a test connection line. The test fixture comprises a both-way SMA connector, screws, waterproof rubber washers, adapters, the two ends of each of which are opened and which are in a communication structure, a sample room having an electromagnetic shielding effect, a sample indoor conductor and a sample to be tested. The both-way SMA connector is formed by four-hole flanges, columnar cylindrical polytetrafluoroethylene and both-way SMA connector dual-female-connector coaxial inner conductors. Based on the organic combination of a transmission reflection method and de-embedding technology, test parasitic effect of a fixture interface is eliminated under the condition of not depending on a special customized calibration device or not carrying out complex mathematical modeling, thereby realizing accurate measurement of the dielectric property of the liquid and solid materials; processing requirement for the test sample is low; the fixture installation is simple; test work frequency range is flexible to expend; and application range is wide.

The invention relates to the field of electrical connectors, in particular to a coaxial connector and a plug and a socket thereof. The coaxial connector comprises the plug and the socket, wherein the plug comprises an outer plug conductor and a connection nut; the connection nut is rotationally assembled on the outer plug conductor; the socket comprises an outer socket conductor; the outer plug conductor is provided with an insertion part which is used for inserting of the outer socket conductor; a set distance is formed between the outer wall surface of the insertion part and the inner wall surface of the connection nut; a thickening part is arranged on an outer layer of the insertion part; expansion parts matched with the thickening part are arranged in holes of the outer socket conductor and the connection nut; the set distance is the distance between the outer side surface of the thickening part and the inner wall surface of the expansion part in the hole of the connection nut; and an outer thread matched with the connection nut is formed in the outer socket conductor. By the coaxial connector, the strength, the reliability and the characteristic impedance can be improved under the condition of not increasing the boundary dimension of the SMA radio-frequency coaxial connector and reserving the mechanical property and the environmental resistance of the SMA connector.