Dielectric resonator antenna phased array for fixed RFID reader in near field region

Author(s):  
S. H. Zainud-Deen ◽  
Hend A. Malhat ◽  
K. H. Awadalla

2012 ◽  
Vol 27 ◽  
pp. 129-142 ◽  
Author(s):  
Saber Helmy Zainud-Deen ◽  
Shaymaa M. Gaber ◽  
Hend Abd El-Azem Malhat ◽  
Kamal Hassan Awadalla




10.5772/54902 ◽  
2012 ◽  
Vol 4 ◽  
pp. 23
Author(s):  
Saber H. Zainud-Deen ◽  
Hend A. Malhat ◽  
Kamal H. Awadalla


2008 ◽  
Vol 2008 ◽  
pp. 1-6 ◽  
Author(s):  
Anda Guraliuc ◽  
Giuliano Manara ◽  
Paolo Nepa ◽  
Giuseppe Pelosi ◽  
Stefano Selleri

A slot-coupled rectangular dielectric resonator antenna (DRA) operating in the 14–14.5 GHz frequency band is investigated as a possible radiating element for an active integrated antenna of a transmitting phased array. The effectiveness of the resonator shape factor on achieving harmonic tuning is addressed. Simulation results show that the DRA shape factor can be used to provide a fine tuning of the DRA input impedance both at the fundamental frequency and its first harmonics, so synthesizing the proper load for the optimization of the microwave amplifier power-added efficiency (PAE).



Author(s):  
Arshad Mehmood ◽  
Onur Hamza Karabey ◽  
Muhammed Ayluctarhan ◽  
Yuliang Zheng ◽  
Hubertus Braun ◽  
...  


10.5772/54896 ◽  
2012 ◽  
Vol 4 ◽  
pp. 19 ◽  
Author(s):  
Hend A. Malhat ◽  
Saber H. Zainud-Deen ◽  
Kamal H. Awadalla


2012 ◽  
Vol 1 (3) ◽  
pp. 71
Author(s):  
H. A. E. Malhat ◽  
S. Zainud-deen ◽  
N. El-Shalaby ◽  
K. Awadalla

Dielectric resonator antenna (DRA) mounted on cylindrical ground plane is investigated for handheld RFID reader applications at 5.8 GHz. The simplicity of the structure makes it practical in terms of cost, space, and ease of fabrication. The radiation characteristics of the antenna in free space and in the presence of a proposed compact reader device model and human hand are calculated. The antenna is circularly polarized and exhibits peak gain of 7.62 dB at 5.8 GHz with high front to back ratio of 15.5 dB. Using the same reader device model, a sequentially feeding 2×2 DRA array mounted on the same cylindrical ground plane is used for RFID reader antenna at 5.8 GHz. The array introduces high gain of 9.36 dB at 5.8 GHz with high front to back ratio of 10.48 dB. The 2×2 DRA array elements exhibit circular polarization over a frequency band of 1.1 GHz. The axial ratio is 1.1 dB at 5.8 GHz. The proposed reader model is simple and has a small size compared with that in the case of planar ground plane. The results are calculated using the finite element method (FEM) and compared with that calculated using the finite integral technique (FIT).



2013 ◽  
Vol 61 (4) ◽  
pp. 2318-2321 ◽  
Author(s):  
Mohammad Ranjbar Nikkhah ◽  
J. Rashed-Mohassel ◽  
Ahmed A. Kishk


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