Near‐field switched loop antenna array with circular defected ground structure for precise positioning systems

2013 ◽  
Vol 49 (24) ◽  
pp. 1510-1512 ◽  
Author(s):  
W.‐S. Lee ◽  
H.‐S. Jang ◽  
K.‐S. Oh ◽  
J.‐W. Yu
Keyword(s):  
Antenna Array ◽  
Near Field ◽  
Loop Antenna ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Precise Positioning ◽  
Positioning Systems

scholarly journals Design of a 1×2 CPW Fractal Antenna Array on Plexiglas Substrate with Defected Ground Plane for Telecommunication Applications

2021 ◽  
Vol 11 (6) ◽  
pp. 7897-7903
Author(s):  
C. Ben Nsir ◽  
J. M. Ribero ◽  
C. Boussetta ◽  
A. Gharsallah
Keyword(s):  
Antenna Array ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Plane ◽  
Systems Design ◽  
Fractal Antenna ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Telecommunication Systems ◽  
Attractive Candidate

In this paper, a fractal antenna array for telecommunication applications is presented. The proposed antenna array is realized on a Plexiglas substrate, has 1×2 radiating elements, and dimensions of 170mm×105mm. The antenna array is composed of two Koch Snowflake patches and is fed by a Coplanar Waveguide (CPW) transmission line. Radiating elements and the ground plane are printed on the top side of the substrate. Defected Ground Structure (DGS) technique is employed to enhance the bandwidth and improve the impedance matching. The proposed antenna array operates at two frequency bands, 1.08-1.32GHz covering the GPS band and 1.7-3.7GHz covering the GSM 1800/1900, UTMS, Bluetooth, LTE, and WiMAX bands. In addition, the antenna has a good performance with efficiency and peak gain of 82% and 6.3dB respectively. These characteristics allow the antenna to be an attractive candidate for telecommunication systems. Design and analysis of different structures were carried out with Ansys HFSS.

scholarly journals A MIMO Reversed Antenna Array Design for gsm1800/td-scdma/lte/wi-max/wiLan/wifi

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Fang Xu ◽  
Mu Ju
Keyword(s):  
Antenna Array ◽  
Impedance Match ◽  
Substrate Thickness ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Array Design ◽  
Mimo Antenna ◽  
The Third ◽  
Frequency Domains ◽  
Working Frequency

A triband MIMO antenna used for gsm1800/td-scdma/lte/wi-max/wiLan/wifi has been proposed in this paper. The design with the size of 32 m∗73.6 mm is fabricated on FR4 substrate (thickness is 1.6 mm). This antenna consists of two reversed monopole meandered radiators and defected ground structure which work together to achieve impedance match and enhance isolation for all operating bands. According to the subsequent measured results, the working frequency domains are at gsm1800 (1.71 GHz–1.88 GHz), td-scdma (1.88 GHz–2.025 GHz), lte (2.1–2.35, 2.48–2.51), wi-max (3.5 GHz, 5.5 GHz), wiLan (5.725 GHz–5.8 GHz), and wifi (5.8 GHz–5.88 GHz) approximately. Besides, the measured radiation patterns (gain total) are also well at these working frequency domains and the omnidirectional performance has been achieved for the reversed MIMO antenna array. Furthermore, the realized isolation is more than 15 dB, 24.2 dB, and 22 dB at the first, the second, and the third working frequency band, respectively.

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