A compact reconfigurable antenna with frequency, polarization and pattern diversity

Abstract

This paper presents a novel, compact and simple reconfigurable antenna using coplanar waveguide feed which has frequency, polarization and pattern diversities. The basic antenna consists of four rectangular patches of dimensions 5 mm × 4 mm. Three switches are used to connect these four patches and with different switching modes, the desired reconfigurability is achieved. The operating frequency/band can be selected as 5.15 GHz (with 33.6% of impedance bandwidth) or 5.55 GHz (with 55% of impedance bandwidth) in two different operating modes. Reconfiguration in polarization takes place from linear polarization to right hand circular polarization and left hand circular polarization, and antenna is capable of rotating its radiation beam by ±180°. The measured results are in good agreement with simulated ones. The antenna exhibits good return loss characteristics, acceptable gain and VSWR.

Reconfigurable antenna using capacitive loading to Artificial Magnetic Conductor (AMC)

“…Reconfigurable antenna has recently attracted a lot of attention due to its ability in dynamically changing its operating frequency , beam control , and polarization to fulfill particular wireless communication service requirement . Frequency reconfigurable antenna is desirable as opposed to multiple use of single band antennas which increase the space consumption, fabrication cost, and circuit complexity .…”