6 results about "Line Impedance Stabilization Network" patented technology

The present application relates to a balanced high-frequency line impedance stabilization network, comprising a high-frequency inductor, a radio frequency load circuit PCB, and a metal housing. The high-frequency inductor and radio frequency load circuit PCB are both located within the metal housing. The radio frequency load circuit PCB is provided with a high-frequency inductor matching network, comprising a high-frequency capacitor and a 50Ω high-frequency load resistor. The present application connects a high-frequency high-resistance inductor and a low-frequency low-resistance inductor in series in an electromagnetic compatibility radiation interference test power cable, while simultaneously connecting a 50Ω load in parallel to ground at the inductor EUT end. This creates a 50Ω radio frequency impedance as seen from the cable end under test of the balanced high-frequency line impedance stabilization network. The balanced high-frequency line impedance stabilization network generates a stable 50Ω radio frequency impedance, simulating the equivalent impedance of a power grid and providing a controlled high-frequency load impedance for the EUT AC power cable.

The utility model discloses a three-phase common-mode noise separation experiment box, which comprises a box body, a detection wiring terminal group arranged on the outer side of the front surface of the box body, a power supply wiring terminal group arranged on the outer side of the back surface of the box body, a signal connection terminal arranged on the outer side of the front surface of the box body, and a three-phase common-mode noise separation system arranged in the box body. According to the technical scheme, the three-phase common-mode noise separation experiment box is internally provided with the three-phase common-mode noise separation system, the system collects interference signals of a tested device powered by three phases through the line impedance stabilization network, and the collected interference signals comprise a common-mode component and a differential-mode component; and then short-circuit processing is performed on each path of interference signal to filter the differential-mode component of each path of interference signal, only the common-mode component of the detected equipment during normal work is extracted, a transformer does not need to be introduced, parasitic parameters are reduced, the detection accuracy of the common-mode interference of the detected equipment can be improved, and the detection efficiency is improved. Related personnel can conveniently obtain accurate experiment results in the experiment process.

The invention relates to the technical field of electromagnetic environment effect tests, and discloses a thunder and lightning and HIRF (High Impact Radio Frequency) system-level comprehensive effect test device and a thunder and lightning and HIRF system-level comprehensive effect test method. Comprising an anechoic chamber, an EUT measuring instrument, a line impedance stabilization network, a transient signal generator, an oscilloscope, a lightning injection probe, a lightning current monitoring probe, a lightning voltage detection ring, a radiation signal generator, a radio frequency amplifier, a receiver, a photoelectric converter near end, a synchronous position adjusting assembly, a photoelectric converter far end, an antenna and an electric field sensor. The system-level thunder and HIRF comprehensive effect test under different polarization modes, HIRF environments at different irradiation angles and various thunder and lightning waveforms can be supported, the problem that thunder and HIRF comprehensive protection performance of an electronic and electrical system of an airplane is unknown can be solved, and potential hidden dangers of safe flight of the airplane in the thunder and HIRF environments can be reduced; and through the synchronous position adjusting assembly, synchronous adjustment of the transmitting antenna and the electric field sensor can be realized.

The application discloses an injection peak voltage test system satisfying the MIL-STD-1275F standard, which comprises a peak signal generator, a power supply, a test device and a line impedance stabilization network; the peak output end of the peak signal generator is connected to the test device and connected to the power supply through the line impedance stabilization network; the peak signal generator comprises a peak signal generation network, an AC / DC voltage adjustment module and a power supply safety protection module connected in sequence, wherein the power supply safety protection module is connected to an external power supply; the peak signal generation network comprises a first standard selection module, a polarity switching module, a second standard selection module, a timer module and a third standard selection module. The application solves the problem that there is no system capable of satisfying the injection voltage peak project test capability of the latest MIL-STD-1275F standard in the industry at present, and can be compatible with the MIL-STD-1275 historical version and the GJB298-87 standard, thereby helping the technical localization of the injection peak voltage test system.

A line impedance stabilization network (LISN) is disclosed. The LISN includes an inductor that defines a first circuit node and a second circuit node and that has a first parasitic resistance, a second parasitic resistance, and a first parasitic capacitance. The LISN further includes a first capacitor that is connected to the first circuit node, that defines a third circuit node, and that has a first parasitic inductance, and a third parasitic resistance. The LISN further includes a second capacitor that is connected to the second circuit node, that defines a fourth circuit node, and that has a second parasitic inductance and a fourth parasitic resistance. The LISN further includes a resistor that is connected to the fourth circuit node and the third circuit node. A configuration of the first circuit node generates a first mutual inductance. A configuration of the second circuit node generates a second mutual inductance.

This invention relates to the field of electromagnetic environment effect testing technology, and discloses a lightning and HIRF system-level integrated effect testing device and method. The lightning and HIRF system-level integrated effect testing device includes: an anechoic chamber, an EUT measuring instrument, a line impedance stabilization network, a transient signal generator, an oscilloscope, a lightning injection probe, a lightning current monitoring probe, a lightning voltage detection loop, a radiation signal generator, a radio frequency amplifier, a receiver, a near-end of a photoelectric converter, a synchronization position adjustment component, a far-end of the photoelectric converter, an antenna, and an electric field sensor. This invention can support system-level lightning and HIRF integrated effect testing under different polarization modes, irradiation angles, and various lightning waveforms. It can solve the problem of unknown integrated lightning and HIRF protection performance of aircraft electronic and electrical systems, and can reduce potential hazards to safe flight of aircraft in lightning and HIRF environments. Furthermore, the synchronization position adjustment component enables synchronous adjustment of the transmitting antenna and the electric field sensor.