A miniature UWB planar monopole antenna with 5-GHz band-rejection filter and the time-domain characteristics |
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Authors: | Young Jun Cho Ki Hak Kim Dong Hyuk Choi Seung Sik Lee Seong-Ook Park |
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Affiliation: | Sch. of Eng., Inf. & Commun. Univ., Daejeon, South Korea; |
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Abstract: | A planar monopole antenna with a staircase shape and small volume (25/spl times/26/spl times/1 mm/sup 3/) is proposed in this paper. With the use of a half-bowtie radiating element, the staircase-shape, and a modified ground plane structure, the proposed antenna has a very wide impedance bandwidth measured at about 11.6 GHz (2.9-14.5 GHz, bandwidth ratio about 1:5) below VSWR 2 including the WLAN band notched in the vicinity of 5 GHz. An omnidirectional radiation pattern is obtained. The group delay which is an indication of linearity between two proposed antennas is less than 1 ns. The electrical characteristics in terms of frequency and time domains and physical ones of the proposed antenna make it attractive for use in ultrawideband (UWB) systems. |
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