RF sensor interception distance test equipment

Abstract

The invention discloses a radio frequency sensor intercepted distance test device, which aims to provide a test device with rich application scenarios, wide working frequency band and high sensitivity. The present invention is realized through the following technical solutions: the receiving subsystem receives the radio frequency signal transmitted by the antenna servo subsystem, and outputs two intermediate frequency signals through the frequency conversion of the down-conversion unit to the data acquisition subsystem and the digital signal processing subsystem respectively; the data acquisition subsystem The system receives one intermediate frequency signal, and adopts high-speed analog-to-digital conversion and solid-state disk array storage system to sample and store the intermediate frequency signal; the digital signal processing subsystem performs high-speed sampling on another intermediate frequency signal, and realizes digital channelized reception in the FPGA module. Perform digital signal processing on the signal output by digital channelization, measure the amplitude, frequency, pulse width, pulse repetition period, and modulation type parameters of the signal, form pulse stream data, and store it in real time to provide input for post-event analysis of the intercepted distance.

Description

technical field [0001] The invention relates to a test device for the intercepted distance of radio frequency sensors, which is used for testing the intercepted distance indicators of various radio frequency sensors. Background technique [0002] For a long time, modern aircraft have used a large number of airborne radio frequency sensors such as radar, communication, navigation, identification, and electronic countermeasures, which has brought great challenges to the low interception performance of the platform. Faced with a complex electromagnetic environment, a working aircraft needs to radiate a large number of electromagnetic signals, and the survivability of the aircraft will be threatened because the radio frequency signal is intercepted by the passive detection system. Radio frequency low probability of interception LPI (Low Probability of Intercept, LPI) technology involves all frequency-using equipment with active electromagnetic signal radiation, such as airborne ...

AI Technical Summary

Problems solved by technology

For example: (1) The electromagnetic environment considered is relatively simple, and there is only one test radar radiation signal, which cannot be applied to complex electromagnetic environments; (2) The test process requires the ground test radar to continuously track the carrier aircraft of the reconnaissance equipment. Test the interception distance of the radar main lobe signal; (3) Lack of verification and evaluation methods for the performance of the RF sensor LPI

Whether the radar signal is intercepted or not is only roughly observed and judged by the display screen, lacking a strict data analysis process, it is difficult to accurately evaluate

At present, there is still a lack of a laboratory-level performance verification and evaluation platform for testing the LPI performance of RF sensors.

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