A Novel UWB Antenna with Tunable Notch Function

This paper presents a novel UWB antenna with tunable notched band .the antenna is assembled on an FR4 substrate with thickness of 1.6 mm and εr =4.4. By inserting a π-shaped slot on the radiating patch band–notch function is achieved. By loading the slot with lumped varactor tunability of the created notch would be possible. Based on this technique an electronically controlled notched band antenna is designed and fabricated including a single varactor diode with a varying capacitance value of 0.16 -2.25 pf. Using the cited varactor , notched band tunability of 2.7-7.2 GHz is obtained

Keywords:

uwb antenna , Band rejection , Variable band notch , Varactor diode