In order to suppress interference in WIMAX(3.3-3.7 GHz),WLAN(5.150-5.825 GHz)and ITU(8.01-8.50 GHz)bands in ultra-wide band communication,an ultra-wide band antenna with three notch characteristics optimized based on MOEA/D algorithm is proposed.The antenna adopts a T-shaped structure as a radiating patch and realizes 3-12 GHz ultra-wide band by changing the shape of the patch.Two U-shaped slots are etched on the radiating patch,and C-shaped open rings are loaded on both sides of the transmission line to design the notch of the antenna.MOEA/D algorithm is used to optimize the structural pa-rameters and loading positions of the notch structure,achieving notch effects in the frequency bands of 3.31-3.69 GHz,5.25-6.13 GHz and 8.01-8.51 GHz with successfully suppressed band interference.Compared with the traditional design method of frequency sweep optimization,the antenna designed by MOEA/D algo-rithm has a gain as low as-19 dB in the notch band,and the accuracy error of each notch frequency band is less than 3.6％,which improves the design efficiency of the antenna and has certain engineering application value.
ultra-wide band antennaMOEA/D algorithmmultiple notches
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