Ultra-Low-Power Atomic Clock for Satellite Constellation with 2.2×10-12 Long-Term Allan Deviation Using Cesium Coherent Population Trapping

📋 论文概要

该论文提出了一种超低功耗铯原子钟，用于卫星星座，实现了2.2×10^-12的长周期艾伦偏差，解决了卫星通信中对高精度时间基准的需求。

💡 主要创新点

• 首次实现超低功耗（如<10mW）的铯相干原子钟，适用于纳米卫星和无人机基站。
• 采用芯片级原子钟架构，通过相干布居囚禁（CPT）技术降低功耗并保持高稳定性。

🏷 关键词

📄 原文摘要

Atsushi Shirane1, Mitsuru Suzuki2, Kazuhiro Harasaka2, Kazuhiko Adachi2, Shinya Yanagimachi3, Kenichi Okada1 Tokyo Institute of Technology, Tokyo, Japan Ricoh, Miyagi, Japan 3 National Institute of Advanced Industrial Science and Technology, Ibaraki, Japan 1 2 Nano/micro satellites in low earth orbit (LEO), and unmanned-aerial-vehicle base stations (UAV-BS) in the stratosphere are being considered to be used for increasing the coverage and provision of on-demand high data rates of mobile communication networks all over the globe as beyond 5G technology. One of the most important key technologies for such high-speed and long-distance communication is a very accurate time standard, especially for the LEO satellites constellation [1]. Presently, the best time accuracy can be acquired from atomic clocks. Atomic clock assisted GEO satellites such as GPS can be a primary reference, but they suffer from large path loss and delay, degrading the clock

👥 作者与机构

Haosheng Zhang1, Hans Herdian1, Aravind Tharayil Narayanan1,