A miniaturized ultra-wideband antenna using 'modified' rectangular patch with rejection in WiMAX and WLAN bands

摘要

A new miniaturized ultra-wideband antenna with sufficient dual-band rejection in WiMAX and WLAN bands is reported. The antenna uses the conventional rectangular patch radiator with built-in sectorial and Inverted-U slots to achieve the required dual-band rejections. A coplanar waveguide feed line has been used to achieve the ultra-wideband operation. The design has been implemented on 1.6 mm thick FR-4 substrate. The design size is 20 x 26 mm(2) (0.16 lambda(L) x 0.208 lambda(L) in terms of wavelength). An impedance bandwidth of 2.4 GHz to 10.5 GHz has been achieved. Pass-band gain of 7 dBi and stop-band gain of -4 dBi have been achieved. Experimental results agree well with simulated results.