Phased-array incoherent scattering radar system

Abstract

The invention discloses a phased-array incoherent scattering radar system. An excitation source signal is generated through a digital receiver and is sent to N transmit-receive switches through a power divider to be pre-amplified, the output, with certain power magnitude, of each transmit-receive switch is fed back to each set of N transmit-receive assemblies through the power divider, the N transmit-receive switches drive the N*N transmit-receive assemblies to work at the same time to carry out final stage amplification on an emitting signal, the N*N transmit-receive assemblies feed the final output power back to N*N antenna sub-arrays, each antenna sub-array is internally provided with an antenna unit, all antenna units are driven through the power divider and send incident waves, the incident waves are scattered towards different directions through atmospheric plasma, the antenna units feed inducted echo signals to a reception channel, the inducted echo signals are amplified through the transmit-receive assemblies and are synthesized again through the synthesized function of a feeder system, and one loop of echo signals are formed at last and input to the digital receiver in sequence to be processed through a signal processing device. At last, the echo signals are output to a master control computer to enable the master control computer to process and synthesize products.

Description

technical field [0001] The invention relates to a phased array incoherent scattering radar system. Background technique [0002] The scattering of electromagnetic waves by a single free electron is called incoherent scattering, also known as Thomson scattering. In 1958, W.E.Gordon pointed out that the scattering of radio waves by free electrons in the ionosphere can be incoherently superimposed, and it is possible to detect scattered echoes with ground-based high-power radars. This is just possibility. In October of the same year, Bowles (K.L.Bowles) measured the scattering echo of the ionosphere. Since then, this method of probing the ionosphere with high-power radar has been called incoherent scatter sounding. However, both practice and theory have proved that this name is not exact, because true incoherent scattering requires that the radar operating wavelength λ is much smaller than the plasma Debye length λ D , in actual detection, λ is greater than or much greater ...

AI Technical Summary

Problems solved by technology

Another important issue is that incoherent scatter radars are very powerful (2 megawatts) and relatively expensive to operate, for example, the incoherent scatter radars supported by the US National Foundation cost about $2 million per radar per year, However, the actual running time of each radar is generally no more than two months per year, which has the disadvantages of large equipment, complex structure, and high maintenance and operation costs.

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