An Array of Coherent Sources Based on Novel Dual-Loop PLL Infrastructure
An Array of Coherent Sources Based on Novel Dual-Loop PLL Infrastructure
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DOI：
10.1109/tie.2012.2227916
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发表时间：
2013-11
影响因子：
7.7
通讯作者：
Chengcheng Tang;Q. Xue
中科院分区：
文献类型：
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作者：
Chengcheng Tang;Q. Xue
提出了一种基于双环锁相环的新型相干源阵列。提出了一种适用于锁相环组的低成本频率和相位控制技术。一种新颖的双环路PLL基础结构由常规PLL环路和微处理器单元控制的相位检测器阵列环路组成，其通过减少元件老化和环境问题的影响来实现对频率和相位的实时校准。该技术具有构建相控发射机阵列的优点。为了演示的目的，一个四元相控阵已被设计和实现，在S波段使用商业可用的组件。分析了近理想本振波束形成性能和阵列方向图自补偿的实现。由于模拟连续相位控制和个人可编程的发射频率，双环PLL相干源阵列在本文中提供了相当大的实际优势时，实现波束形成，相比其他波束形成技术。
In this paper, a novel array of coherent sources based on dual-loop phase-locked loop (PLL) is proposed. An advanced low-cost frequency and phase control technique for a group of PLLs is presented. A novel dual-loop PLL infrastructure consists of a conventional PLL loop and a microcontroller-unit-controlled phase-detector-array loop, which achieves real-time calibration on both frequency and phase by reducing the effect of component aging and environmental issues. This technique has its advantages of building a phased transmitter array. For the purpose of demonstration, a four-element phased array has been designed and implemented by using commercially available components at S-band. Near-perfect local oscillator (LO) beamforming performance and array pattern self-compensation realization are presented and analyzed. Due to analog continuous phase control and individual programmable transmit frequency, the dual-loop PLL-based coherent-source array in this paper offers considerable practical advantages when implementing beamforming, as compared to other beamforming techniques.