Full-light-control phased array radar transmitter based on broadband light source

Abstract

A full-light-control phased array radar transmitter based on a broadband light source comprises a microwave signal generating part, a signal modulation and delay part and a transmitting part. The microwave signal generating part comprises the broadband light source, a first optical divider, a second optical divider, a first polarization controller and the like. The signal modulation and delay part comprises a second electrooptical modulator, a second optical amplifier, an optical fiber delay network, a second optical combiner. The transmitting part comprises a first wavelength division multiplexer, an optical fiber or an optical cable, a photoelectric detector array and the like. According to the full-light-control phased array radar transmitter based on the broadband light source, microwave signals are generated through an optoelectronic oscillator based on the broadband light source, an external microwave source is omitted, the broadband light source is used for replacing a multi-wavelength laser array, the structure that the wavelength division multiplexer is used for dividing the broadband light source enables the full-light-control phased array radar transmitter to be simple and compact in structure, and cost is lowered.

Description

technical field [0001] The invention relates to a method and a device in the field of microwave photonics and radar, in particular to an all-optical phased array radar transmitter based on a broadband light source. Background technique [0002] Phased array radar realizes beam scanning with the help of antenna configuration, and has a wide range of applications in military, electronic countermeasures, communication and other fields. However, due to the aperture effect of the traditional electronically controlled phased array radar (see Zhang Guangyi, Zhao Yujie, Phased Array Radar Technology, Beijing: Electronic Industry Press, 2006.12:390-392), there is a beam in the case of wide bandwidth angular scanning. The phenomenon of offset, so the instantaneous bandwidth of the radar signal is limited. In recent years, with the development of optoelectronic technology, the concept of optically controlled phased array radar has been proposed. The optical phased array modulates the...

AI Technical Summary

Problems solved by technology

However, the external microwave signal source of traditional phased array radar has problems such as narrow tunable range, limited time-bandwidth product of radar signal, and large phase noise.

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