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浏览/检索结果: 共4条，第1-4条 帮助 限定条件 发表日期：2017     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Optical system design of compound multi-point measurement velocity interferometer 期刊论文 Guangxue Jingmi Gongcheng/Optics and Precision Engineering, 2017, 卷号: 25, 期号: 8, 页码: 2023-2028 作者:  Yan, Ya-Dong;  He, Jun-Hua;  Xu, Rui-Hua;  Wei, Ming-Zhi;  Li, Qi 收藏  |  浏览/下载：21/0  |  提交时间：2017/12/30 Quasi-three-level orthogonally polarized cw dual-wavelength operation in Nd:LiYF4 期刊论文 Optics and Laser Technology, 2017, 卷号: 90 作者:  Zhang, J.;  J. Xia;  X. H. Fu and P. Zhai 收藏  |  浏览/下载：10/0  |  提交时间：2018/06/13 Experimental demonstration of time- and mode-division multiplexed passive optical network 期刊论文 OPTICAL FIBER TECHNOLOGY, 2017 Ren, Fang; Li, Juhao; Tang, Ruizhi; Hu, Tao; Yu, Jinyi; Mo, Qi; He, Yongqi; Chen, Zhangyuan; Li, Zhengbin 收藏  |  浏览/下载：38/0  |  提交时间：2017/12/03 Mode-division multiplexing  Passive optical network  Mode MUX/DEMUX  TWDM-PON  DYNAMIC WAVELENGTH  STAGE-2 NG-PON2  FIBER  TRANSMISSION  EFFICIENT  ALLOCATION  COUPLERS   Compact broadband circularly-polarised directional universal GNSS antenna with symmetric radiation pattern and stable near-zenith coverage 期刊论文 IET MICROWAVES ANTENNAS & PROPAGATION, 2017, 卷号: Vol.11 No.5, 页码: 657-663 作者:  Liu, Q;  Li, Y;  Mo, ZG;  Liu, YA 收藏  |  浏览/下载：10/0  |  提交时间：2019/12/31 satellite navigation  directive antennas  broadband antennas  antenna radiation patterns  antenna feeds  UHF antennas  power dividers  phase shifters  electromagnetic wave polarisation  compact broadband circularly-polarised directional universal GNSS antenna  symmetric radiation pattern  near-zenith coverage  CP antennas  global navigation satellite system  circular radiating patch  semisector-annulus sheets  compact broadband four-feed circuit  out-of-phase power splitter  coupled-line power dividers  broadband phase shifters  output magnitude distribution  high-precision feed signals  gain variation  CP bandwidth  symmetric patterns  street canyons  mountainous area  frequency 1  13 GHz to 2  51 GHz