Design and Development of Ultra-Thin Monopole Antenna for WLAN and WiMAX Operations in the Next-Generation Laptop Computer

Abstract

A novel, compact and ultra-thin monopole antenna for wireless operations in the Next-Generation laptop computer is developed. The dimension of the antenna is only 20 × 6 mm2 and is designed using only a pure copper strip of 0.2mm. The simple structure of the proposed antenna consists of PS and ST radiating strips and an open ended rectangular tuning stub QR. This structure generates two resonating modes at 3.45 GHz and 5.5 GHz and achieves the measured −10dB impedance bandwidth as 19.71% (3.20-3.90) GHz in lower band (F1) and 16.17% (5.00-5.88) GHz in the upper band (Fu). The proposed antenna shows a stable gain of approximately 5.2dBi and an excellent efficiency of approximately 86-92% in both operating bands. Therefore, the proposed antenna is a good candidate for wireless application in laptops.