In this paper, we are designed and fabricated circular polarization microstrip patch antenna of 5[GH]z bandwidth for the wireless LAN and the ISM. We are proposed new structure that removed the section which intersected at a right angle and were c...
In this paper, we are designed and fabricated circular polarization microstrip patch antenna of 5[GH]z bandwidth for the wireless LAN and the ISM. We are proposed new structure that removed the section which intersected at a right angle and were composed to four separated slots. The antenna of proposed structure could solve parasitic elements from intersected in a right angle and weak coupling efficiency from asymmetry between feed line and a slot. The proposed cross slots antenna is easily impedance matching and increased impedance bandwidth. Also this is increased efficiency and a bandwidth of antenna and reduce back lobe of radiation pattern. We designed 2${\times}$2 array antenna of 5[GHz] band. It took impedance bandwidth 280[MHz](VSWR < 1.5) and gam 12.5[dBi]