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All-optical control phased array radar transmitter based on broadband light source

A technology of optically controlled phased array and broadband light source, which is applied in the field of microwave photonics and radar, can solve the problems of large phase noise, narrow tunable range, and limited radar signal time-bandwidth product, so as to optimize phase noise and reduce effective The effect of bandwidth

Active Publication Date: 2017-01-04
SHANGHAI JIAOTONG UNIV
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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.

Method used

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  • All-optical control phased array radar transmitter based on broadband light source
  • All-optical control phased array radar transmitter based on broadband light source
  • All-optical control phased array radar transmitter based on broadband light source

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Embodiment Construction

[0024]A specific embodiment of the present invention is given below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and processes are given, but the protection scope of the present invention should not be limited to the following embodiments.

[0025] figure 1 It is a structural schematic diagram of an embodiment of an all-optical phased array radar transmitter based on a broadband light source in the present invention. Its composition includes a microwave signal generating part, a signal modulation and delay part, and a transmitting part. The microwave signal generation part includes a broadband light source 1-1, a first optical splitter 1-2, a second optical splitter 1-3, a first polarization controller 1-4, an adjustable delay module 1-5, a second Two polarization controllers 1-6, a first electro-optic modulator 1-7, a first optical combiner...

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Abstract

An all-optical phased array radar transmitter based on a broadband light source, including a microwave signal generating part, a signal modulation and delay part, and a transmitting part. The microwave signal generating part includes a broadband light source, a first optical splitter, and a second optical splitter. The splitter, the first polarization controller, etc., the signal modulation and delay part include the second electro-optic modulator, the second optical amplifier, the fiber delay network, and the second optical combiner, and the transmitting part includes the first wavelength division multiplexer , optical fiber or cable, photodetector array, etc. The present invention generates microwave signals through a photoelectric oscillator based on a broadband light source, which reduces the need for an external microwave source to replace a multi-wavelength laser array with a broadband light source, and uses a wavelength division multiplexer to cut the broadband light source to promote the optically controlled phased array structure Simple and compact, reducing cost.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/282G01S7/35
Inventor 邹卫文张昊陈建平
Owner SHANGHAI JIAOTONG UNIV
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