科研之友
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摘要
In this article, a novel super-wideband planar microstrip-fed monopole antenna is investigated and designed. The antenna consists of a well-optimized hut-shaped radiating patch having a diamond-shaped slot window at its center. To achieve nearly omnidirectional pattern, a partial ground plane consisting of an optimized slit exactly on the opposite of the feed line is used. Measurement results show that the impedance bandwidth for |S-11|(dB)10 dB is enhanced largely to 184.5% with a ratio bandwidth more than 24.8:1 (0.9-22.35 GHz). This, together with its nearly constant measured gain of 3.35 dBi +/- 1 dB over this entire band makes it a potential candidate for both ultra-wideband and super-wideband applications. Moreover, the proposed antenna has a compact size of 40 x 25 mm(2) on 1.6 mm thick FR4 substrate with dielectric constant of 4.4. Details of the proposed antenna are described, and both theoretical and experimental results are presented.
- 出版日期2015-11
