Parasitic Array Antenna With Enhanced Surface Wave Launching for On-Body Communications

2013 ◽  
Vol 61 (4) ◽  
pp. 1976-1985 ◽  
Author(s):  
Lida Akhoondzadeh-Asl ◽  
Yuriy Nechayev ◽  
Peter S. Hall ◽  
Costas C. Constantinou
Keyword(s):  
Surface Wave ◽  
Array Antenna ◽  
Enhanced Surface ◽  
Parasitic Array

A Technique of Scan Blindness Elimination for Planar Phased Array Antenna using Miniaturized EBG

2014 ◽  
Vol 69 (2) ◽  
Author(s):  
M. S. M. Isa ◽  
R. J. Langley ◽  
S. Khamas ◽  
A. A. M. Isa ◽  
M. S. I. M. Zin ◽  
...  
Keyword(s):  
Surface Wave ◽  
Band Gap ◽  
Radiation Pattern ◽  
Phased Array ◽  
Elevation Angle ◽  
Array Antenna ◽  
Phased Array Antenna ◽  
Electromagnetic Band Gap ◽  
Novel Technique ◽  
Wave Effects

In this paper, the planar phased array antenna scan blindness characteristic has been analyzed and a novel technique of eliminating the scan blindness for the phased array antenna has been introduced. The scan blindness of the center element has been used to present the entire phased array characteristic. The array scan blindness characteristics have been simulated and analyzed using CST Microwave Studio (CST MWS). The 5×3 planar phased array antenna radiation patterns against the pattern elevation angle direction has been simulated and compiled. The array’s scan blindness has been determined at the angle of approximately 47⁰. The miniaturized capacitive loaded Electromagnetic Band Gap (EBG) has been developed and introduced between the array elements to eliminate the problem. Based on the simulated results, it is shown that the use of a miniaturized EBG is effective in reducing the surface wave effects and eliminates the scan blindness in the array radiation pattern. This novel finding is very useful to improve the antenna directive efficiency for the directional radar and satellite application.

scholarly journals Energy efficient switched parasitic array antenna for 5G networks and IoT

2016 ◽  
Author(s):  
Ahmed Kausar ◽  
Hani Mehrpouyan ◽  
Mathini Sellathurai ◽  
Rongrong Qian ◽  
Shafaq Kausar
Keyword(s):  
Energy Efficient ◽  
Array Antenna ◽  
5G Networks ◽  
Parasitic Array

A Novel Planar Parasitic Array Antenna With Frequency- and Pattern-Reconfigurable Characteristics

2014 ◽  
Vol 13 ◽  
pp. 1569-1572 ◽  
Author(s):  
Tongfeng Guo ◽  
Wen Leng ◽  
Anguo Wang ◽  
Jianjun Li ◽  
Qingfeng Zhang
Keyword(s):  
Array Antenna ◽  
Parasitic Array

Fast Beamforming of Compact Array Antenna

2009 ◽  
pp. 183-200
Author(s):  
Chen Sun ◽  
Takashi Ohira ◽  
Makoto Taromaru ◽  
Nemai Chandra Karmakar ◽  
Akifumi Hirata
Keyword(s):  
Smart Antenna ◽  
Central Element ◽  
Array Antenna ◽  
Least Mean Square ◽  
Digital Beamforming ◽  
Training Time ◽  
Parasitic Array ◽  
Output Sinr ◽  
Beamforming Algorithm ◽  
Compact Array

In this chapter, we describe a compact array antenna. Beamforming is achieved by tuning the load reactances at parasitic elements surrounding the active central element. The existing beam forming algorithms for this reactively controlled parasitic array antennas require long training time. In comparison with these algorithms, a faster beamforming algorithm, based on simultaneous perturbation stochastic approximation (SPSA) theory with a maximum cross-correlation coefficient (MCCC) criterion, is proposed in this chapter. The simulation results validate the algorithm. In an environment where the signal-to-interference ratio (SIR) is 0 dB, the algorithm converges within 50 iterations and achieves an output SINR of 10 dB. With the fast beamforming ability and its low power consumption attribute, the antenna makes the mass deployment of smart antenna technologies practical. To give a comparison of the beamforming algorithm with one of the standard beamforming algorithms for a digital beamforming (DBF) antenna array, we compare the proposed algorithm with the least mean square (LMS) beamforming algorithm. Since the parasitic array antenna is in nature an analog antenna, it cannot suppress correlated interference. Here, we assume that the interferences are uncorrelated.

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