Bandwidth Enhancement of Circular Ring Fractal Antenna for Wireless Applications

Design and performance evaluation of SWB MIMO antenna with tri-notch functionality and mutual coupling suppression

“…Excessive thickness can lead to the excitation of surface waves. The height of the substrate can choose according to the given equation [29] ℎ ≤…”

CPW Fed Koch Modified Fractal Antenna Backed with Partial Ground for Multiband Wireless Applications

“…to achieve multiband characteristics. Apart from slots different fractal shaped curves like crinkle fractal [5], I-shaped [6], circular ring fractal [7], [9], meander like fractal [10], dual reverse arrow fractal [11], modified Sierpinski gasket fractal [11], Minkowski fractal [15], Sierpinski fractal [16], [17], periwinkle flower shaped fractal [19] and hybrid fractal [20][21][22] also have been used to get multiband response. Alongside multiband response efforts have also been given to enhance bandwidth using several techniques like partial ground [3,20,23], crinkle fractal with partial ground [5], ring fractal with partial ground [8], circular slotted hexagonal shaped ring [10], elevated slotted triangular patch [11], fractal slot based DGS [13], [21] and Minkowski fractal with triangular dielectric resonator [15] in multiband antennas.…”

“…PSO technique is used to optimize the length of the I-shaped fractal antenna. A circular ring fractal, meander like fractal and wheel shaped ring fractal with partial ground plane are designed to achieve multiband response with enhancement in bandwidth [7][8][9]. Enhancement in bandwidth is also achieved in an SRR based hexagonal ring fractal antenna due to slotted ground plane [10].…”