A radio frequency stealth transmit beamforming method and system based on four-dimensional antenna array

Abstract

The present invention provides a radio frequency stealth transmission beamforming method based on a four-dimensional antenna array, which can achieve similar or even better detection performance to that of MIMO and phased MIMO arrays only by designing a simple sequence, and is different from Compared with the traditional radio frequency stealth radar, due to the pseudo-randomness of timing, the radar can be endowed with good radio frequency stealth performance. Based on the above method, the present invention also provides a radio frequency stealth transmitting beamforming system based on a four-dimensional antenna array, which has a simple structure and is easy to realized features. By controlling the generation conditions of the four-dimensional antenna timing, the invention can easily realize the orthogonality between the transmitting antennas or the sub-arrays between different radio frequency switches under the condition that the radiation signal has good radio frequency stealth performance, and the receiving end receives the echo And through signal processing, information of multiple targets can be obtained at the same time.

Description

technical field [0001] The invention belongs to the technical field of antenna engineering, and in particular relates to a radio frequency stealth transmitting beamforming method and system based on a four-dimensional antenna array. Background technique [0002] In 1959, Shanks and Bickmore of the Hughes Aircraft Company in the United States introduced the time dimension to the conventional antenna array with three-dimensional spatial changes, and proposed the concept of four-dimensional antenna array and time modulation for the first time. In 1963, American scholar Kummer and others proposed the concept of time-modulated antenna array: by periodically switching on and off the antenna excitation, the radiation aperture size of the antenna can be controlled in the "time" dimension. The time-modulated antenna array is a kind of four-dimensional antenna array. The four-dimensional antenna array uses radio frequency switches to control the working state of each unit according t...

AI Technical Summary

Problems solved by technology

Because this technology has made a compromise and balance between phased array radar and MIMO radar, it is called phased MIMO radar. There needs to be a certain degree of coherence between units, which will bring great challenges to the design and manufacture of transceiver components

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