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

Jayshri S. Kulkarni; Swapnita Dhabre

Jayshri S. Kulkarni Department of Electronic and Telecommunication Engineering, Vishwakarma Institute of Information Technology, Pune 411048, India.
Swapnita Dhabre Department of Electronic and Telecommunication Engineering, Vishwakarma Institute of Information Technology, Pune 411048, India.

Keywords: Inverted 'E' shaped monopole antenna, system ground, ultra-thin, WLAN, WiMAX

Abstract

A 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 . 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 and 18.78% (4.92-5.94)GHz in the upper band 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 and bands. This confirms the applicability for WLAN/WiMAX applications in the prominent ultra-thin laptop computers.