An Ultra-Thin, Inverted 'E' Monopole Antenna for Wireless Operations in the Laptop Computer

novel and ultra-thin inverted 'E' shaped monopole antenna for Wireless operations in the laptop
computer is presented. The thickness of the antenna is only 0.2mm and is designed using only a pure
copper strip of size 20× 6mm. The innovation of the design is miniaturized size and wider impedance
bandwidth in dual band operation using two monopole radiating strips namely RS (inverted J) and
PQ(inverted Z) along with open ended vertical tuning stub of size 4.5x1 mm2. The measured
impedance bandwidth spanned as 11.24% (2.35-2.63)GHz in a lower band (F) and 18.78% (4.92-
5.94)GHz in the upper band (F ) for VSWR<2 and covers 2.4/5.2/5.8 GHz WLAN and 5.5 GHz
WiMAX bands. The presented antenna has proved excellent radiation performance, including nearly
omni directional patterns, a stable gain of around 4dBi and an excellent efficiency of around 90% in F
and F bands. This confirms the applicability for WLAN/WiMAX applications in the prominent ultra-thin
laptop computers.