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55 results about "Network analyzer (electrical)" patented technology

A network analyzer is an instrument that measures the network parameters of electrical networks. Today, network analyzers commonly measure s–parameters because reflection and transmission of electrical networks are easy to measure at high frequencies, but there are other network parameter sets such as y-parameters, z-parameters, and h-parameters. Network analyzers are often used to characterize two-port networks such as amplifiers and filters, but they can be used on networks with an arbitrary number of ports.

Method for testing beam scanning characteristics of passive array antenna

The invention discloses a method for testing beam scanning characteristics of a passive array antenna, relates to the technical field of radar and antenna testing, and solves the problem of how to realize rapid and efficient testing of the beam scanning characteristics of an electrically large-size passive array antenna. The method is based on a planar near-field test system, a digital array radarbeam forming technology is applied to passive array antenna test, and a multi-channel switch and a vector network analyzer are used for replacing an active channel and a digital receiver of a digitalarray radar. A planar near-field scanning frame, a multi-channel switch and a vector network analyzer are used for cooperatively controlling a probe, sequential control and acquisition are matched, near-field amplitude and phase data of each antenna unit are obtained through one-time planar near-field scanning, and scanning beam near-field data are calculated through a digital beam synthesis method. Beam scanning characteristics of the passive array antenna are obtained through near-far field transformation; any beam scanning characteristic of the passive array antenna under different workingfrequencies can be obtained through one-time planar near-field scanning, and the test efficiency is improved by times.
Owner:CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST

Plane wave generator measuring system based on movable array antenna and applied to base station antenna production line

The invention relates to a plane wave generator measuring system based on a movable array antenna and applied to a base station antenna production line. The system comprises a plane wave generator based on a movable array antenna, a shielding camera obscura, a complete wave absorbing material in the camera obscura, a shielding design, an open-close type tested equipment bracket, an amplitude modulation and phase modulation network, an industrial personal computer and a vector network analyzer. A high-quality virtual plane wave dead zone is formed in an area close to the double aperture size ofthe aperture surface of the two-dimensional array antenna by controlling the position of an array antenna unit, the excitation amplitude and phase, adjusting the position of the array antenna for N (N is greater than or equal to 1) times and processing through a signal synthesis algorithm. The plane wave generator is wide in application range, can be used for directional diagram measurement of anelectrically large-size antenna and system radio frequency index measurement with the electrically large-size antenna, and is especially suitable for production line rapid measurement of a base station antenna of 5G mobile communication and measurement of a millimeter wave band terminal antenna and system.
Owner:BEIHANG UNIV

RCS measurement system and method

The invention discloses an RCS measurement system and method. The system comprises a vector network analyzer, a transceiving antenna, a control machine, a power amplifier and a rotary table control system which are electrically connected. The vector network analyzer is used for transmitting and receiving radio frequency signals; the control machine controls the vector network analyzer through an LAN (Local Area Network) bus; the turntable control system is used for controlling a to-be-measured target to rotate in an azimuth plane so as to acquire near-field scattering data under different azimuth angles; and a to-be-measured target is controlled by the turntable control system to rotate in an azimuth plane, the vector network analyzer outputs a radio frequency signal, the radio frequency signal is amplified by the power amplifier and then radiated by the transmitting antenna, the receiving antenna receives an echo signal of the to-be-measured target, the echo signal is sent to the vector network analyzer and compared with calibration data, and RCS measurement of the to-be-measured target under different azimuth angles is completed. The measurement range is wide, the measurement field of view is large, the RCS scattering matrix and target broadband multi-dimensional imaging characteristics can be measured, and electromagnetic scattering characteristic data can be visually obtained.
Owner:佛山蓝谱达科技有限公司

Multi-frequency-point radio frequency impedance and current testing system

The invention discloses a multi-frequency-point radio frequency impedance and current testing system. The multi-frequency-point radio frequency impedance and current testing system comprises a radio frequency multi-frequency-point testing clamp and a radio frequency current probe, wherein a gap is formed between inner cores of a top cover shell, a pressure gauge is arranged on the inner core of atop cover, a base inner core is arranged in a base shell, a radio frequency signal injection end is arranged at the end of the base inner core, the radio frequency current probe and a device to be tested are placed at the boundary between the top cover shell and the base shell, and the device to be tested is located between the inner core of the top cover and the inner core of the base; a microstrip line is arranged on the top face of a T-shaped plate and connected with a vector network analyzer and the radio frequency current probe; and the T-shaped plate is provided with a coupling coil, andthe coupling coil is electrically connected with the microstrip line and the ground plane. The multi-frequency-point radio frequency impedance and current testing system overcomes the defect that thehigher harmonic signal testing capacity is insufficient in the actual testing process, the good transmission performance of the clamp to multiple frequency points is achieved, the electromagnetic compatibility problem is solved, radio frequency current information is obtained in the testing process, and the problem that devices such as foam cannot be accurately tested due to the irreversible characteristic of compression in the testing process is solved.
Owner:海宁利伊电子科技有限公司

Direct current resistance and radio frequency impedance synchronous online monitoring device and method of BGA link

The invention provides a direct current resistance and radio frequency impedance synchronous online monitoring device and method of a BGA link, the device comprises a to-be-monitored BGA sample, an impedance conversion clamp, a vector network analyzer and a direct current resistance tester, the to-be-monitored BGA sample is clamped on the impedance conversion clamp and is electrically connected with the impedance conversion clamp; the to-be-monitored BGA sample is connected with the vector network analyzer through the impedance conversion clamp, and the vector network analyzer is used for monitoring a TDR impedance signal of a radio frequency link of the to-be-monitored BGA sample; and the to-be-monitored BGA sample is connected with the direct current resistance tester through the impedance conversion clamp, and the direct current resistance tester is used for collecting a resistance signal of a DC link of the to-be-monitored BGA sample. According to the direct current resistance and radio frequency impedance synchronous on-line monitoring device and method, direct current resistance and radio frequency impedance synchronous on-line monitoring of a BGA link can be realized, the monitoring cost can be reduced, the test error can be reduced, and the test effect can be guaranteed.
Owner:CHINA ELECTRONICS PROD RELIABILITY & ENVIRONMENTAL TESTING RES INST

System and method for measuring shielding effectiveness of nonlinear conductive material

The invention discloses a system and method for measuring shielding effectiveness of a nonlinear conductive material. The system is characterized in that one end of a positive electrode of a measurement clamp of the measurement system is connected with a static contact of a measurement mode change-over switch alpha, and the other end is connected with one end of a vector network analyzer; the other end of the vector network analyzer is connected with a movable contact 1 of the measurement mode change-over switch alpha; a negative electrode of the measurement clamp is connected with one end of a high-voltage alternating-current power supply and the ground, the other end of the high-voltage alternating-current power supply is connected with one end of a sampling resistor, the other end of the sampling resistor is connected with a measurement mode change-over switch beta, and the other end of the measurement mode change-over switch beta is connected with a movable contact 2 of the measurement mode change-over switch alpha; a voltmeter is connected in parallel with the two ends of the sampling resistor; and during measurement, the two ends of an object to be measured are electrically connected with the positive electrode and the negative electrode of the measurement clamp respectively. According to the method, the resistance of the object to be measured is measured by adopting a microstrip line method and/or voltammetry; and then the shielding effectiveness of the object to be measured is calculated, and the bandwidth can reach DC-40GHz.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Full-automatic multi-interface network analyzer calibrating device

The invention discloses a full-automatic multi-interface network analyzer calibrating device which comprises two microwave switches, a plurality of calibrating components and a circuit board, wherein each microwave switch is provided with a main port and a plurality of branch ports; the plurality of calibrating components are respectively connected with the branch ports of the two microwave switches so as to form a plurality of calibrating channels between the two microwave switches; and the circuit board is electrically connected to the two microwave switches so as to control the two microwave switches to selectively open one of the calibrating channels and close the other calibrating channels when the network analyzer is calibrated. The multiple calibrating components are connected between the two microwave switches to form multiple calibrating channels, and in the calibrating process, the microwave switches are controlled by the circuit board to be communicated with the corresponding calibrating channels one by one according to needs, so that calibrating of multiple parameters of the network analyzer is completed at a time, the calibrating operation convenience is improved, and the network analyzer calibrating device has the advantages of being compact in structure, convenient to operate and good in stability.
Owner:METROLOGY & MEASUREMENT CENT OF CHINA ACADEMY OF ENG PHYSICS

Laser silver removing machine and automatic parallel silver removing method of dielectric filter

The invention discloses a laser silver removing machine of a dielectric filter. The laser silver removing machine comprises a feeding mechanism, a discharging mechanism, a material transferring mechanism, a clamp mechanism, a laser silver removing mechanism, a network analyzer and a radio frequency switcher electrically connected with the network analyzer. The feeding mechanism and the dischargingmechanism are arranged in parallel separately, and the material transferring mechanism is arranged between the feeding mechanism and the discharging mechanism. The laser silver removing mechanism isarranged at one side of the material transferring mechanism, and the clamp mechanism is arranged between the material transferring mechanism and the laser silver removing mechanism. The silver removing machine is reasonable in design and compact in structure; a silver layer in a resonance hole is removed by laser stably, precisely and efficiently; the invention further provides an automatic parallel silver removing method of the dielectric filter, parallel silver removal of multiple filters can be achieved through the method, all mechanisms are made to be in a full-load state, the working efficiency is high, the power consumption is low, the cost is low, and the practicability is high.
Owner:深圳市利和兴股份有限公司

Coaxial connector electromagnetic shielding effectiveness testing device

PendingCN113655293AIncrease coupling lengthAdjustable coupling lengthElectromagentic field characteristicsCharacteristic impedanceMagnetic shield
The invention discloses a coaxial connector electromagnetic shielding effectiveness testing device, solves the problem of how to reduce the difficulty of electromagnetic shielding effectiveness testing of a connector, and belongs to the technical field of electrical circuit element detection. The device comprises a connecting line, an inner circuit tube, an outer circuit tube, a matching impedor and a network analyzer; one end of the connecting line is connected with the signal output end of the signal source, the connecting line is arranged in the inner circuit tube, the other end of the connecting line is connected with a port on the same side of the inner circuit tube and one end of the coaxial connector to be tested at the same time, and the other end of the coaxial connector to be tested is connected with one end of the matching impedor; the other end of the matching impedor is connected with a measurement signal input end of the network analyzer; one port of the outer circuit tube is connected with the outer wall of the inner circuit tube, and the other port of the outer circuit tube is connected with a signal input port of the network analyzer; the matching impedance among the signal source, the inner circuit tube and the outer circuit tube is equal to characteristic impedance of the network analyzer.
Owner:HARBIN INST OF TECH

Ferrite consistency detection jig and detection method

The invention provides a ferrite consistency detection jig and detection method. The ferrite consistency detection jig comprises a substrate, a coil, a matching circuit and a network analyzer, the coil and the matching circuit are printed on the surface of the substrate, and the coil is electrically connected with the network analyzer through the matching circuit; the ferrite detection jig is configured to place standard ferrite on the surface of the area, printed with the coil, of the substrate, debug the matching circuit to enable the frequency range displayed by the network analyzer to be within the preset frequency range, and replace the ferrite to be detected for consistency detection. Based on the principle that corresponding electromagnetic frequency can be displayed on the network analyzer through electromagnetic induction between the coil and the ferrite, the electromagnetic frequency of the standard ferrite is enabled to be within a preset frequency range through debugging of the matching circuit, and then the ferrite to be detected is replaced for testing; and therefore, consistency of the ferrite can be confirmed by judging whether the frequency displayed on the network analyzer is within the preset frequency range or not, and a problem of how to detect consistency of the ferrite is solved.
Owner:深圳市卓睿通信技术有限公司

Single-ended test method for wave-absorbing characteristic of material

The invention discloses a single-ended test method for the wave-absorbing characteristic of a material, which comprises a sample cavity, a microwave transmission rod, a spring needle, an SMA joint and a vector network analyzer, wherein one end of the sample cavity is provided with a test fixture; the microwave transmission rod is arranged in the sample cavity and is connected with the test fixture in a penetrating manner; the spring needle is arranged in the microwave transmission rod; the SMA joint is arranged at the other end of the sample cavity; the receiving end of the vector network analyzer is electrically connected with a coaxial cable, and the other end of the coaxial cable is electrically connected with the other end of the SMA joint. The method has the beneficial effects that the wave-absorbing characteristic of the material is tested by utilizing a single-ended method, the wave-absorbing characteristic of the material can be obtained by intuitively testing S11 through a vector network analyzer through the single-ended method, and meanwhile, test equipment does not need to be rebuilt, a darkroom does not need to be built, and arch test equipment does not need to be built; the test method can be used as another complementary test method of the bow-shaped method or the two methods for mutual verification.
Owner:LANZHOU UNIVERSITY

An optoelectronic device frequency response testing system and method

ActiveCN110098866BAchieve modulationBroaden the dynamic range of light outputElectromagnetic transmissionContinuous lightControl signal
The invention provides a photoelectric device frequency response test system and method. The photoelectric device frequency response test system comprises a laser light source, a broadband electro-optical modulator, a power adjusting module and a vector network analyzer. The laser light source provides a stable continuous optical signal for the broadband electro-optical modulator; the power adjusting module is used for receiving the modulated optical signal output by the broadband electro-optical modulator and outputting optical signals with different powers to the tested optical and electrical device according to the control signal of the vector network analyzer; the vector network analyzer is used for providing a microwave modulation signal and a control signal of the power adjusting module, receiving an electric output signal output by the photometric electric device and a power-regulated optical signal fed back by the power regulation module, and calculating the frequency responseof the to-be-measured optical electrical device under different power optical signals. The problem that the dynamic range of the light source module is insufficient is solved, large dynamic power adjustment can be achieved, the problem that an electro-optical modulator scans again and finds a working point when the optical power is adjusted can be avoided, and the testing efficiency is greatly improved.
Owner:CHINA ELECTRONIS TECH INSTR CO LTD

Method for confirming electromagnetic delay of network analyser and measuring high frequency circuit impedance

The invention relates to the mobile communication field, in particular to a technology for impedance measurement on a mobile terminal high-frequency circuit through a network analyzer. A method provided by the technology is used for determining the electromagnetic delay of the network analyzer and measuring the impedance of the high-frequency circuit and comprises the steps as follows: a probe ofthe network analyzer is connected with the high-frequency circuit for measurement to obtain a first reflection coefficient after the network analyzer is calibrated; after the electrical inductance isconnected in series with the high-frequency circuit, the probe of the network analyzer is connected with the circuit that is connected in series with the electrical inductance for measurement to obtain a second reflection coefficient; and the electromagnetic delay of the network analyzer is determined according to the electrical inductance value, the first reflection coefficient and second reflection coefficient. The reflection coefficients are measured before and after the high-frequency circuit is connected in series with the electrical inductance, and both the reflection coefficients can reflect the phase excursion caused by the probe or other factors in the circuit, so that the compensating electromagnetic delay to the phase excursion is determined according to the two reflection coefficient values so as to lead the impedance measurement to be more accurate.
Owner:QINGDAO HISENSE MOBILE COMM TECH CO LTD
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