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Abstract
In this paper, an ultra-wideband antenna is designed with Y-shaped patch and a defected ground plane in which two symmetrical U-shaped slots is made. The proposed antenna fulfils the criteria of ultra-wideband from frequency range of 2.87 GHz to 12 GHz. The simulated value of VSWR is less than two for the proposed design .The gain of the antenna is attained more than 5 dB. By using defected ground structure gain, bandwidth and reflection co-efficient parameter are improved. The proposed antenna is capable for various applications such as WIMAX, WLAN, Spacecraft, satellite and X-band etc. In this paper different result of antenna such as reflection co-efficient, gain, VSWR, radiation pattern are discussed using ANSOFT HFSS.