A compact band‐notched ultrawideband dielectric‐loaded antenna

A compact ultrawideband (UWB) dielectric‐loaded antenna with band notched characteristics is presented. The antenna consists of the circular metal radiation patch fed by a 50‐Ω microstrip transmission line and a rectangular ground plane with cutting a notch to achieve UWB application. By etching a modified U‐shaped slot in the radiating patch and properly tuning its location and form, band rejected filtering properties in the WiMAX/WLAN bands can be achieved easily. The compact size of the proposed DRA can be reduced to 14.5 × 29 mm2 using a dielectric resonator (DR) above the modified circular radiation patch and possess band‐notched UWB characteristics. A good agreement has been obtained between simulation and measurement and it has good omnidirectional radiation patterns in H‐plane. Especially, the proposed band‐notched UWB loaded with GYA DR has excellent surrounding environment temperature stability. Base on these desirable features of the proposed band‐notched UWB dielectric‐loaded antenna, it is shown that it is a good candidate for various UWB applications.