Reconstructed optically-controlled phased array radar transmitter based on optical switching

Abstract

The invention discloses a reconstructed optically-controlled phased array radar transmitter based on optical switching. The reconstructed optically-controlled phased array radar transmitter comprises a power amplifier, an antenna array, a wave control computer, a laser, a microwave source, a light modulator, a wavelength division multiplexer, a programmable optical delay line, a programmable optical attenuator, an all-optical wavelength switch and a photoelectric detector. A wavelength division multiplexing method and an all-optical wavelength switch method are combined organically; on the basis of having the advantages of a conventional optically-controlled phased array radar, dynamic reconfiguration of a subarray is realized, and simultaneous multi-target whole-airspace tracking, which cannot be realized by the conventional optically-controlled phased array radar, can be met; and the radar transmitter is simple and practicable, is reliable in performance and has cost advantage.

Description

technical field [0001] The invention relates to the technical field of optically controlled phased array radar, in particular to a reconstructed optically controlled phased array radar transmitter based on optical switching. Background technique [0002] Compared with the traditional mechanical scanning radar antenna, the phased array antenna realized by modern electronic technology has great advantages in terms of response speed, target update rate, multi-target tracking ability, resolution, and versatility. The phased array antenna uses a specific feeding method, intelligent control and adjustment of the amplitude and phase of the array element to make the beamforming non-inertial and flexible scanning, thereby greatly improving the information acquisition and update rate. In a phased array antenna system, the beam scanning is formed by adjusting the phase relationship between the radiating elements, so the signal distribution method required to obtain the necessary phase ...

AI Technical Summary

Problems solved by technology

However, there are still many problems in the full electronic control of the phased array antenna unit. The main reason is that the phased array antenna can only scan in a relatively narrow signal bandwidth due to the limitation of the aperture transit time, which limits its wideband and Wide-angle scanning performance, which severely restricts the application of phased array antennas in complex environments and high-performance fields

[0003] There are many methods for antenna multi-beam formation, such as Blass method, Buter multi-beam matrix method, all-digital multi-beam (DBF) method and sub-antenna array method, etc. For the common DBF and sub-antenna array methods in receiving antennas, The advantage of the all-digital multi-beam method is high performance and easy to realize continuous sliding scanning. The disadvantage is that the number of channels is large and the cost is high. The advantage of the sub-antenna array method is that it reduces complexity and saves money. Flat elevation and narrowing of operating bandwidth

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