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A 4×4 dual-band MIMO Fractal-PIFA antenna with high isolation is designed and fabricated. The antenna operates at 2.6 GHz and 5 GHz with large bandwidth of 13.4% and 20.4% resprctivrly for wide-band applications in portable terminals. Based on self affinity and lengthened shorting pin of PIFA structure, the single antenna is miniaturized up to nearly 90% comparing to traditional patch one. Being on...
This paper presents a monopole MIMO antenna using decagon fractal patch resonator and defected ground plane for wireless local area network (WLAN) application. The fractal technique is applied on the edge of antenna patch for the lower band of operating frequency. Meanwhile, the ground plane of antenna is disturbed with rectangular shape to decrease the mutual coupling between the radiating patch...
A closely spaced two-element wideband tree shaped fractal dielectric resonator antenna (DRA) design with low mutual coupling over a wide band of 4.05–10 GHz is proposed. By properly arranging array elements, and using C-shaped periodic defected ground structure (PDGS), mutual coupling reduction has been achieved. Mutual coupling less than −15dB over the entire band of interest is achieved. Conformal...
Fractal Structures based on Electromagnetic bandgap (EBG) can contribute to the mutual coupling reduction between microstrip antennas due to its capability of suppressing surface waves propagation in a given frequency range. In this paper, a new arrangement of one layer Uni-Planar Fractal based on EBG (UPF-EBG) structure has analysed. The structure without any shorting pins or vias builds on a well-known...
A MIMO antenna of size 40mm × 40mm × 1.6mm is proposed for WLAN applications. Antenna consists of four mushroom shaped Apollonian fractal planar monopoles having micro strip feed lines with edge feeding. It uses defective ground structure (DGS) to achieve good isolation. To achieve more isolation, the antenna elements are placed orthogonal to each other. Further, isolation can be increased using parasitic...
This paper evaluates the reconfigurability of a 2D fractal tree antenna to improve the capacity of a 2??2 MIMO link using pattern diversity. Each fractal tree antenna possesses several degrees of freedom: number of fractal stages, branches per stage, angle between branches, and parent-to-child branch scaling length. Simulations of various Reconfigurable Printed Fractal Tree Arrays (RPFTAs) are conducted...
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