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北京大学 [1]
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华南理工大学 [1]
上海电子信息职业技术... [1]
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期刊论文 [4]
会议 [1]
其他 [1]
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2017 [2]
2013 [1]
2007 [1]
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Polarization patterns under different sky conditions and a navigation method based on the symmetry of the AOP map of skyligh
期刊论文
OPTICS EXPRESS, 2018, 卷号: 26, 页码: 28589-28603
作者:
Zhao, Huijie
;
Xu, Wujian
;
Zhang, Ying
;
Li, Xudong
;
Zhang, Hao
收藏
  |  
浏览/下载:5/0
  |  
提交时间:2019/12/30
Aerosols
Navigation
Aerosol optical thickness
Angle of polarization
Atmospheric conditions
Calculation error
Imaging measurements
Navigation methods
Polarization patterns
Polarization state
Polarization
Compact dual-band dual circularly polarised annular-ring patch antenna for BeiDou navigation satellite system application
期刊论文
IET MICROWAVES ANTENNAS & PROPAGATION, 2017, 卷号: 11, 页码: 1079-1085
作者:
Chen, Kan
;
Yuan, Jiade
;
Luo, Xinyao
收藏
  |  
浏览/下载:8/0
  |  
提交时间:2019/11/21
BDS application
rectangular-ring radiation patch
perturbation structure
satellite navigation
meandered-line-shaped ring radiation patch
antenna feeds
loss 10 dB
UHF antennas
bandwidth 2395 MHz to 2574 MHz
impedance matching
arc-shaped coupled feeding line
BeiDou navigation satellite system application
satellite antennas
microstrip antennas
compact rectangular-ring patch antenna
air gap
compact dual-band dual circularly polarised annular-ring patch antenna
antenna radiation patterns
electromagnetic wave polarisation
bandwidth 1595 MHz to 1632 MHz
inverted-L shaped strip
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
Persistence and decay of web citations used in theses and dissertations available at the Sokoine National Agricultural Library, Tanzania
期刊论文
International Journal of Education and Development using Information and Communication Technology, 2013, 卷号: Vol.9 No.2, 页码: 85-94
作者:
Sife,AlfredS.
;
Bernard,Ronald
收藏
  |  
浏览/下载:2/0
  |  
提交时间:2020/01/04
Doctoral
Dissertations
Theses
Agricultural
Education
Special
Libraries
Citation
Indexes
Citations
Usability
Navigation
Electronic
Publishing
Electronic
Libraries
Error
Patterns
Library
Research
Library
Materials
Bibliometrics
Citation
Analysis
Foreign
Countries
Mining personalization interest and navigation patterns on portal
其他
2007-01-01
Wu, Jing
;
Zhang, Pin
;
Xiong, Zhang
;
Sheng, Hao
收藏
  |  
浏览/下载:1/0
  |  
提交时间:2015/11/16
portal
interest behavior
implicit interest elicitation
hidden Markov Model (HMM)
navigation patterns
A center-fed BeiDou antenna with zero phase center (EI收录)
会议
Cnr Sheridan St and Wharf St, Cairns, QLD, Australia,
作者:
Zheng, Ke-Ke[1]
;
Chu, Qing-Xin[1]
收藏
  |  
浏览/下载:5/0
  |  
提交时间:2019/04/11
Bandwidth
Directional patterns (antenna)
Electric impedance
Microstrip antennas
Navigation systems
Phase shifters
Radio navigation
Satellite antennas
Satellite navigation aids
Slot antennas
Wireless telecommunication systems
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