A UHF near-field/far-field RFID metamaterial-inspired loop antenna

2012 ◽  
Author(s):  
Xianming Qing ◽  
Zhi Ning Chen ◽  
Chean Khan Goh
Keyword(s):  
Near Field ◽  
Loop Antenna ◽  
Far Field

scholarly journals COMPACT LOOP ANTENNA FOR NEAR-FIELD AND FAR-FIELD UHF RFID APPLICATIONS

2013 ◽  
Vol 37 ◽  
pp. 171-182 ◽  
Author(s):  
Xiao-Zheng Lai ◽  
Ze-Ming Xie ◽  
Xuan-Liang Cen
Keyword(s):  
Near Field ◽  
Loop Antenna ◽  
Far Field ◽  
Uhf Rfid ◽  
Rfid Applications

A 90GHz pulsed-transmitter with near-field/far-field energy cancellation using a dual-loop antenna

2011 ◽  
Author(s):  
Amin Arbabian ◽  
Shinwon Kang ◽  
Steven Callender ◽  
Bagher Afshar ◽  
Jun-Chau Chien ◽  
...  
Keyword(s):  
Near Field ◽  
Loop Antenna ◽  
Field Energy ◽  
Far Field

scholarly journals A Reconfigurable Passive UHF Reader Loop Antenna for Near-Field and Far-Field RFID Applications

2012 ◽  
Vol 11 ◽  
pp. 580-583 ◽  
Author(s):  
A. L. Borja ◽  
A. Belenguer ◽  
J. Cascon ◽  
J. R. Kelly
Keyword(s):  
Near Field ◽  
Loop Antenna ◽  
Far Field ◽  
Rfid Applications

Magnetic Tag Antenna for UHF Near-field and Far-Field RFID Applications

2015 ◽  
Vol 5 (2) ◽  
pp. 119
Author(s):  
Mondher Dhaouadi ◽  
M. Mabrouk ◽  
T. Vuong ◽  
A. Ghazel
Keyword(s):  
Near Field ◽  
Far Field ◽  
Rfid Applications

Far field modeling of the Mamala Bay outfalls

1998 ◽  
Vol 38 (10) ◽  
pp. 323-330
Author(s):  
Philip J. W. Roberts
Keyword(s):  
Field Model ◽  
Near Field ◽  
Far Field ◽  
Field Modeling ◽  
Visitation Frequency ◽  
Statistical Variation ◽  
Long Time ◽  
Harmonic Average ◽  
Ocean Outfall ◽  
Acoustic Doppler Current Profilers

The results of far field modeling of the wastefield formed by the Sand Island, Honolulu, ocean outfall are presented. A far field model, FRFIELD, was coupled to a near field model, NRFIELD. The input data for the models were long time series of oceanographic observations over the whole water column including currents measured by Acoustic Doppler Current Profilers and density stratification measured by thermistor strings. Thousands of simulations were made to predict the statistical variation of wastefield properties around the diffuser. It was shown that the visitation frequency of the wastefield decreases rapidly with distance from the diffuser. The spatial variation of minimum and harmonic average dilutions was also predicted. Average dilution increases rapidly with distance. It is concluded that any impact of the discharge will be confined to a relatively small area around the diffuser and beach impacts are not likely to be significant.

Direction of Arrival Estimation Under Near-Field Interference Using Matrix Filter

2015 ◽  
Vol 23 (04) ◽  
pp. 1540007 ◽  
Author(s):  
Guolong Liang ◽  
Wenbin Zhao ◽  
Zhan Fan
Keyword(s):  
Near Field ◽  
Direction Of Arrival ◽  
Doa Estimation ◽  
Direction Of Arrival Estimation ◽  
Far Field ◽  
Data Simulation ◽  
Estimation Algorithms ◽  
Simulation Results

Direction of arrival (DOA) estimation is of great interest due to its wide applications in sonar, radar and many other areas. However, the near-field interference is always presented in the received data, which may result in degradation of DOA estimation. An approach which can suppress the near-field interference and preserve the far-field signal desired by using a spatial matrix filter is proposed in this paper and some typical DOA estimation algorithms are adjusted to match the filtered data. Simulation results show that the approach can improve capability of DOA estimation under near-field inference efficiently.

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