CRLH-TL-loaded metamaterial antenna with frequency band and polarization reconfigurability

In this communication, an asymmetric co-planar waveguide (ACPW)-fed composite right-left-handed transmission line (CRLH-TL)-based frequency band and polarization reconfigurable antenna (RA) is presented. The reconfigurability is achieved by using a PIN diode. When the diode is in OFF state, meander line works as part of ground. Hence, the antenna is like a circular patch antenna working at 5.15 GHz. In the ON state, the antenna works as a CRLH-TL-based antenna with an additional lower band resonating at 2.45 GHz. The antenna also has circular polarization (CP) property. The lower 2.4 GHz band is covering for IEEE 802.11 b/g/n/ax/be applications, whereas the higher band is covering the WiFi bands of IEEE 802.11a/h/n/ac/ax/be applications with CP radiation (upper band). This antenna is effective in a scattering environment such as in urban areas and indoor communication. In this communication, an asymmetric co-planar waveguide (ACPW)-fed composite right-left-handed transmission line (CRLH-TL)-based frequency band and polarization reconfigurable antenna (RA) is presented. The novelty of the work is that in OFF state the antenna works like a simple circular patch antenna which is suitable for 5.2 GHz WLAN/WiFi applications and in ON state the antenna converts to a CRLH antenna, which can operate as a dual band in 2.4 and 5.2 GHz Bluetooth/WiFi/WLAN applications with CP radiation in the upper band.image