CPW-Fed UWB antenna with multiple band-notches for WiMAX, WLAN and X-band satellite downlink communication systems

Abstract

In the paper, a CPW-Fed ultra-wideband antenna with multiple notched bands is presented. The antenna is uniplanar i.e. designed on single surface of substrate. The antenna is designed for the rejection of Worldwide Interoperability for Microwave Access (WiMAX) [3.3–3.6 GHz], lower wireless local area network (WLAN) [5.15–5.35 GHz], upper WLAN [5.725–5.825 GHz] and X-band satellite downlink communication system [7.25–7.75 GHz] to avoid the interference with UWB system. The narrow and closely spaced lower and upper WLAN bands are rejected with the help of double open-circuited stubs, while the antenna receives the signal from intermediate band [5.35–5.725 GHz]. The WiMAX and X-band are rejected by embedding slot resonators in the CPW feed line. By varying the parameters of embedded slot resonators, the WiMAX and X-band notches have been obtained. The antenna radiates over frequency band 3.1–10.6 GHz with VSWR<2, except at the rejected bands having high rejection level. This antenna improves S/N of UWB, WiMAX, WLAN and X-band communication links.