Microwave photonic beamforming network architecture based on switch-switched optical tunable delay line and its phased array radar system

The switch-type optically tunable true delay line architecture with multi-level allocation and multiplexing mechanism solves the problems of high loss, high complexity and low integration of microwave photonic beamforming networks in large-scale phased array applications. It achieves high bandwidth and high precision delay control, reduces the number of devices and power consumption, and is suitable for large-scale phased array radar and broadband communication.

CN120567252BActive Publication Date: 2026-06-23SHANGHAI JIAOTONG UNIV +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI JIAOTONG UNIV
Filing Date
2025-05-21
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing microwave photonic beamforming networks suffer from high loss, high complexity, low integration, and limited accuracy in large-scale phased array applications, making it difficult to reduce the number of delay devices and simplify the system structure while maintaining high bandwidth and high-precision adjustable delay.

Method used

The switch-type optically adjustable true delay line architecture, which employs a multi-level allocation and multiplexing mechanism, adjusts the delay of two or more microwave optical signals through a single-channel delay line. Combined with an optical beam splitter and a multi-level switch-type delay line, it achieves high-precision, wideband, and programmable time delay control for large-scale antenna arrays.

Benefits of technology

It significantly reduces the number of delay devices and system complexity, improves system integration and scalability, reduces power consumption, and maintains reliability over a wider temperature and bandwidth range, making it suitable for large-scale phased array radar, satellite communications, and broadband wireless communications.

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Abstract

A microwave photon beam forming network architecture based on switch switching type optical adjustable true delay line and its phased array radar system. The architecture realizes delay difference adjustment of multiple optical signals by modulating microwave signals in the optical domain and utilizing the characteristics of multiple adjustable delay paths in a single channel switch switching type delay line, thereby supporting high precision, wideband beam forming without beam oblique view while greatly reducing the number of delay lines and delay units; through two or more levels of delay configuration, the network can flexibly meet the wideband delay compensation requirements of different array antenna units, has relatively low complexity and strong dynamic reconfigurable ability, is suitable for implementation of large-scale photon integrated chips, the number of delay lines of the application is reduced by about 50%, and no frequency dispersion is generated, which can significantly reduce the system complexity, cost and power consumption, and is especially suitable for wideband phased array systems such as millimeter wave, satellite communication and radar detection.
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