Abstract
A compact ultra-wide band printed antenna with tri-band notched characteristic is proposed. Two different types of slot are used to obtain the three stopband. By using an H-shaped slot etched on the radiation patch, two notched band, 3.3–3.6 GHz for WiMAX and 5.15–5.825 GHz for WLAN, are achieved. U-slot defected ground structure is used to achieve another notched band at 8 GHz for some satellite service. Moreover, conceptual circuit model, which is based on the impedance of the proposed antenna, is also shown to discuss the principle of the triple band-notched characteristic. The proposed antenna yields an impedance bandwidth of 3.1–10.6 GHz with VSWR < 2, except the notched bands. The antenna is successfully simulated and measured, showing tri-band rejected characteristic can be obtained by using two different slots.
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