A Novel, Compact and Ultra-thin Monopole Antenna for Wireless Applications in the Next-Generation Laptop Computer

A novel, compact and ultra-thin monopole antenna for wireless operations in the Next-Generation laptop computer is developed. The antenna is only 0.2mm thick and has dimesnions of 20 × 6mm². The simple structure of the proposed antenna consists of two monopole radiating strips namely PS and ST and an open ended rectangular tuning stub QR of length 9mm. This structure generates two resonating modes at 3.45GHz and 5.5GHz and achieves the measured -10dB impedance bandwidth as 19.71% (3.20-3.90)GHz in lower band (Fl) and 16.17% (5.00-5.88)GHz in the upper band (Fu). The measured radiation performance including, nearly omnidirectional radiation patterns, a stable gain of around 5.2dBi and excellent efficiency around 86-92% in both operating bands have been achieved.