中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共5条，第1-5条

帮助

条数/页：排序方式：
	RF spectrum measurement of the versatile microcavity soliton combs 会议论文 OAI收割 Nantong, China, 2021-10-10 作者: Hu, Hao; Wang, Ruolan; Chen, Liao; Wang, Weiqiang; Zhang, Chi \| 收藏 \| 浏览/下载：27/0 \| 提交时间：2022/01/27 Dissipative Kerr solitons microresonator radio frequency spectrum autocorrelation trace
	Doppler-robust high-spectrum-efficiency VCM-OFDM scheme for low Earth orbit satellites broadband data transmission 期刊论文 OAI收割 IET COMMUNICATIONS, 2018, 卷号: 12, 期号: 1, 页码: 35-43 作者: Li, Jionghui; Xiong, Weiming; Sun, Geng; Wang, Zhugang; Huang, Yonghui \| 收藏 \| 浏览/下载：74/0 \| 提交时间：2018/03/02 Satellite Ground Stations Satellite Links Radio Receivers Radio Transmitters Ofdm Modulation Modulation Coding Doppler Shift Filtering Theory Doppler-robust High-spectrum-efficiency Vcm-ofdm Scheme Low Earth Orbit Satellites Broadband Data Transmission High-efficiency Satellite-ground Downlink Data Transmission System Limited Spectrum Resource Dynamic Link Conditions Orbital Motion Leo Satellite Variable Coding Modulated Orthogonal Frequency Division Multiplexing Satellite On-board Transmitter Ground Station Receiver Filtered-ofdm Signal Adjustable Codmod Spectral Efficiency Physical Layer Frame Structure Doppler Frequency Shift Compensation Future Gigabit X-band Reliable Satellite-ground Downlink Transmissions
	Optical thin films for high power LD-pumped Nd:YVO4 457nm blue laser (EI CONFERENCE) 会议论文 OAI收割 ICO20: Optical Design and Fabrication, August 21, 2005 - August 26, 2005, Changchun, China Bu Y.; Zheng Q.; Xue Q.; Qian L. 收藏 \| 浏览/下载：21/0 \| 提交时间：2013/03/25 The expanding field of LD-pumped solid state lasers forms an extraordinary challenge for developing the optical coatings. Optical thin films for LD-pumped Nd:YVO4/LBO blue laser at 457nm was presented in this paper based on lower gain laser line action theory including spectral beam dividers and doubling antireflecting multilayer coatings. To achieve 914nm laser action and 457nm blue light high output power the coating specifications of laser resonator was analyzed. The transmittance/reflectance spectrum request was effectively separated by adopting high tuned radio stack simultaneously the spectrum request was reasonably distributed on the two resonator facet reflectivity for restrain the other laser lines such as1064nm and1342nm. The dielectric high reflective laser mirror and antireflecting coatings for 457nm laser were manufactured by double ion beam sputtering technique which is controlled by a time-power monitoring. Using type-I critical phase-matching LBO crystal 457nm blue laser is obtained by 914nm intracavity frequency doubling. The maximum laser output power of 1.5W is obtained when incident pump laser of 15W is used.
	RFI test observations at a candidate SKA Site in China 期刊论文 OAI收割 EXPERIMENTAL ASTRONOMY, 2004, 卷号: 17, 期号: 1-3, 页码: 423-430 作者: Peng, B; Sun, JM; Zhang, HY; Piao, TY; Li, JQ 收藏 \| 浏览/下载：47/0 \| 提交时间：2017/06/27 antenna measurement radio frequency interference radio spectrum telescope site
	Multi-frequency observations of PSR B0329+54 期刊论文 OAI收割 Chinese Astronomy and Astrophysics, 2000, 卷号: 24, 期号: 4, 页码: 467-472 作者: ESAMUDIN Ali; WU Xin-ji; ZHANG Jin; WANG Na; KANG Lian-sheng 收藏 \| 浏览/下载：40/0 \| 提交时间：2013/03/06 pulsar radio spectrum multi-frequency observation