Terahertz radar scattering cross section testing system and radar scattering cross section extraction method

Abstract

The invention relates to a terahertz radar scattering cross section testing system, which comprises a 0.22THz frequency stepping radar system, a two-dimensional high-precision electrically controlledturntable, a stepping motor controller, wherein the 0.22THz frequency stepping radar system includes a frequency synthesizer, a radio frequency front end, a digital intermediate frequency module, a horn antenna, a signal acquisition and processing board, an upper computer control unit and an image display unit, the upper computer control unit is connected with the frequency synthesizer through anRS232 communication serial port, the frequency synthesizer is connected with the radio frequency front end through a high-frequency low-loss cable, the radio frequency front end is connected with thehorn antenna through a gold-plated rectangular waveguide, the radio frequency front end is connected with the digital intermediate frequency module through a high-frequency low-loss cable, the digitalintermediate frequency module is connected with the signal acquisition and processing board through a coaxial cable, and the signal acquisition and processing board is connected with the image display unit through crossover cable. The terahertz radar scattering cross section testing system is simple in test principle and high in measurement accuracy.

Description

technical field [0001] The invention relates to the field of scattering characteristics of terahertz targets, in particular to a terahertz radar scattering cross-section testing system and a method for extracting target radar scattering cross-sections. Background technique [0002] The ultimate goal of radar is to obtain the characteristic information of the target, and the radar cross section is the most important content in the target characteristics, and it is also the basis of stealth research. Terahertz radar refers to a radar system that operates in the frequency range of 0.1THz-10THz. This frequency band is in the transition region from photonics to electronics. Therefore, it has the characteristics of both infrared and microwave. The target of the same material shows completely different properties from infrared and microwave under the irradiation of terahertz radar. This electromagnetic characteristic makes terahertz radar have strong anti-stealth ability. Cross-se...

AI Technical Summary

Problems solved by technology

However, these stealth methods are aimed at the stealth of mature radar frequency bands such as lidar and microwave radar, and the stealth effect on terahertz radar is not good.

Images