Compact wideband folded monopole antenna coupled with parasitic inverted-L element for laptop computer applications

Abstract

A wideband folded monopole antenna coupled with a parasitic inverted-L element for 2.3–10.6 GHz band laptop computer applications is presented. The designed antenna is composed of a printed folded monopole with an asymmetrical line width and a parasitic inverted-L element. The input impedance is matched by widening the line width of the folded monopole and adjusting the space between the parasitic inverted-L element and the folded monopole. The measured −10 dB bandwidth is 4.85:1 (2.27–11 GHz), and the size of the antenna is 13.75 (1λ/10) mm×12 (1λ/11) mm (where λ=2.27 GHz).