Compact Planar Monopole UWB Antenna with Quadruple Band-Notched Characteristics
نویسندگان
چکیده
A compact planar monopole UWB antenna with quadruple band-notched characteristics is analyzed and presented. By introducing a C-shaped slot, nested C-shaped slot in the radiating patch and U-shaped slot in the feed line, quadruple band-notched characteristics are achieved at frequencies of 2.5, 3.7, 5.8 and 8.2 GHz. The proposed antenna has been fabricated and tested. Measured impedance bandwidth of the antenna is 2.35–12 GHz, which covers Bluetooth and UWB band, for VSWR < 2 and also has four stop bands of 2.44–2.77, 3.42–3.97, 5.45–5.98 and 8–8.68GHz, for VSWR > 2, for rejecting 2.5/3.5GHz WiMAX, WLAN and ITU 8 GHz band signals, respectively. The average gain of this antenna is 4.30 dBi with a variation of ±1.8 dBi over the whole impedance bandwidth. Significant gain reduction over the rejected band is also observed. The antenna shows good omnidirectional radiation patterns in the passband with a compact size of 40 mm× 34mm.
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