Asymmetric CPW-Fed Multistubs Loaded Compact Printed Multiband Antenna for Wireless Applications

摘要

An asymmetric coplanar waveguide-fed branched multistubs resonators loaded printed antenna is presented for multiband operation. By incorporating an asymmetrical long and short L-shaped branched stubs, the lower resonances for 2.4 and 3.5 GHz bands are achieved while the higher resonance for 5.5 GHz band is achieved by embedding horizontal stub on asymmetric CPW-fed printed antenna. By placing multistubs resonators at suitable location on asymmetric CPW-fed printed antenna, it is likely to excite the triple resonances at 2.44/3.66/5.25 GHz frequencies and antenna exhibits the bandwidths of 5.73% (140 MHz, 2.36-2.50 GHz), 16.98% (630 MHz, 3.40-4.03 GHz), and 14.65% (800 MHz, 5.06-5.86 GHz), respectively. The design procedure and antenna characteristics of the proposed multistubs loaded multiband antenna are presented.