A NOVEL DESIGN OF 5.5/7.5 GHz DUAL BAND-NOTCHED ULTRAWIDEBAND ANTENNA

作者：Ojaroudi Nasser; Ojaroudi Hamed; Ojaroudi Mohammad^*; Ghadimi Noradin

来源：Microwave and Optical Technology Letters, 2013, 55(12): 2910-2915.

DOI：10.1002/mop.27956

• dual band-notched function
• open-circuit slit
• satellite communications
• ultrawideband systems
• WLAN

This article presents a new design of ultrawideband (UWB) monopole antenna with the characteristics of dual band rejection .The antenna consists of a square radiating patch with U-shaped slot and a pair of -shaped slits, and a ground plane with an open-circuit slit which provides a wide usable fractional bandwidth of more than 120%. By applying the open-circuit slit in the ground plane, a new resonance at 12.1 GHz is excited and much wider impedance bandwidth can be produced. The band notching of wireless local area network (5-6 GHz), is achieved by inserting a U-shaped slot, and a band-notching for downlink of X-band satellite communication systems (7.25-7.75 GHz) is obtained by embedding two -shaped slits at square radiating patch. The simulated and measured results show that the antenna design exhibits an operating bandwidth (VSWR<2) from 2.86 to 12.92 GHz excluding the rejected bands. The proposed antenna configuration is simple, easy to fabricate and can be integrated into any UWB system. The proposed antenna has a symmetrical structure which improves the antenna radiation pattern characteristics.

• 出版日期2013-12