Photonic microwave phased array transceiving system and method thereof

Abstract

The invention discloses a photonic microwave phased array transceiving system and method thereof. On the basis of an LCoS tunable laser array, multi-channel wavelength tunable laser is generated; after a microwave signal of an electrooptical modulator is modulated and the unit delay is obtained through a high-dispersion optical fibre, a sub-array delay line of a cascade optical switch is input; distribution of multi-channel retardation is obtained; the multi-channel retardation is transmitted to an optical detector; an output signal of the optical detector enters an electronic signal processor to perform electronic signal processing, such that processing of a received loop signal is realized; a delayed modulated optical signal is input into a wavelength division demultiplexing and photoelectric conversion part; an antenna unit transmits a signal through an electric circulator; and thus, processing of a sent loop signal is realized. According to the photonic microwave phased array transceiving system and method thereof disclosed by the invention, a lot of reconfigurable and adjustable real-time delay can be generated through a photonic technology; furthermore, the photonic microwave phased array transceiving system and method thereof are used in delay signal processing of sending and receiving channels of a microwave phased array; therefore, pointing control of transmitting beams is realized; and received signal processing of obtained target information is realized.

Description

technical field [0001] The invention belongs to the field of microwave photonics technology, in particular to a photon microwave phased array transceiver system and a method thereof. Background technique [0002] In the middle of the twentieth century, people started the technical revolution of replacing mechanical rotating antennas with phased array antennas. On the one hand, phased arrays have high performance and wide application advantages. Today, phased array systems have been fully applied in defense and civilian fields such as radar, communications, electronic warfare, and navigation. On the other hand, as the requirements from applications continue to improve the performance of phased array antenna systems, if today's microwave engineering hardware and systems only use electronic technology, they cannot meet the ever-increasing requirements due to their limited signal response speed and bandwidth. ([1]Hunter D.B., Minasian R.A., "Photonic signal processing of micro...

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Problems solved by technology

However, for a microwave phased array system with a large number of antenna elements, there are still many technical difficulties in realizing a reconfigurable and adjustable real-time photon delay distribution of microwave signal transmission and reception ([6]E.I.Ackerman, C.H.Cox, "Optimization of photonic transmit/receive module performance," Microwave Photonics, 2009. MWP'09. International Topical Meeting on, pp.1-4, 2009. [7] M.Shen and R.A.Minasian, "Linearization Processing of a Novel Short Time-Delay WDM Superposed FibreBragg Grating,” IEEE Photonics Technology Lette

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