Design of Flower Shaped CSRR UWB Antenna with Integrated Bluetooth and Wi-Max Band-Notched Characteristics

Integrated Bluetooth and Wi-Max band - notched flower shaped printed UWB antenna is designed and investigated. A novel circular complementary split ring resonator (CSRR) is etched in the flower shaped radiating patch. The flower shaped radiating patch along with modified ground plan (MGP) provides UWB operation. The proposed antenna allows operations in the Bluetooth and UWB frequency band from 2.4 to 2.5 GHz and 3.1 to 11.7 GHz respectively for reflection coefficient < -10 dB and has band rejection of 3.3 to 3.7 GHz in order to prevent Wi-Max signals. Maximum reflection coefficient (-3 dB) is observed at the center of notched frequency band. Extra Bluetooth and notched band characteristics are independently controlled and generated by etching a CSRR in the radiating patch. The two round corners and an extra semi-circular slot below the fed line in the MGP results in better impedance matching at high frequency of UWB. The antenna is printed on FR-4 substrate and fed by a microstrip fed line. The size of the antenna is 38 x 26mm<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup>• The proposed antenna exhibits omnidirectional and directional radiation pattern in H and E-plane with stable gain and good time domain characteristics at all desired frequency band.