A Novel Compact Printed Slot Antenna with Triple Bands for WiMAX/WLAN Applications Using Remodeling Technology

摘要

A novel compact triple-band Printed Slot Antenna (PSA) fed by CPW is presented in this paper. By attaching a crescent-shaped strip to the extremity of the CPW fed-line of a conventional CPW-fed circle slot antenna, a lower resonant mode is excited. Then, with an annular strip located between the circle slot and the crescent-shaped strip, an additional resonant mode and better impedance matching is achieved. Besides, a rectangular shorting stub is loaded at the appropriate position of the annular strip to obtain more resonant modes. By adopting such remodeling technology, the aperture utilization efficiency is greatly improved, and thus, multifunctional integration in a compact size can be realized. The designed PSA, featuring of a small size of 23x30 mm, operates over the frequency ranges 2.33-2.7 GHz, 3.3-3.8 GHz and 4.83-6.26 GHz, with good omni-directional radiation patterns and rather stable antenna gains, is suitable for both WLAN and WiMAX applications.