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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >Dual-band and omnidirectional miniaturized planar composite dipole antenna for WLAN applications
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Dual-band and omnidirectional miniaturized planar composite dipole antenna for WLAN applications

机译：用于WLAN应用的双频带和全向小型平面复合偶极天线

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摘要

A novel planar omnidirectional dipole antenna for wireless local area network (WLAN) applications is proposed. The antenna consists of a sleeve dipole antenna for the lower band and a cage dipole antenna for the upper band. Employing a unique planar composite structure, good dual-band impedance matching can be achieved without an external matching circuit. The lowerband dipole antenna adopts a sleeve structure, which reduces the size by bending in the middle and thickening at the end as inductance and capacitance loading, respectively. The upper-band dipole antenna is embedded in the lower-band dipole antenna, and the impedance bandwidth is broadened by adopting a cage structure and coupling with the lower-band dipole antenna. The proposed antenna occupies an area of 0.38 λ_0 × 0.08 λ_0 (λ_0 represents the wavelength of the lower frequency) on FR4 substrate of thickness 0.8 mm. The measured results show that the impedance bandwidths with a return loss more than 10 dB are 2.27-2.65 GHz and 4.89-6.02 GHz. The antenna has an omnidirectional radiation pattern, and both E-plane and H-plane have lower crosspolarization levels. The average gain reaches 2.4 and 3.3 dBi in the 2.4- and 5-GHz bands, respectively. The antenna is compact and easy to fabricate, and can be used for small omnidirectional WLAN terminal device.
机译：提出了一种用于无线局域网（WLAN）应用的新型平面全向偶极天线。天线由用于下带的套筒偶极天线和上部带的笼子偶极天线组成。采用独特的平面复合结构，可以在没有外部匹配电路的情况下实现良好的双频阻抗匹配。下带偶极天线采用套筒结构，其通过分别通过在中间弯曲和增厚时减小尺寸，分别作为电感和电容负载。上带偶极天线嵌入下带偶极天线中，并且通过采用笼结构和与下带偶极天线耦合而宽泛扩大阻抗带宽。所提出的天线占面积为0.38λ_0×0.08λ_0（λ_0表示较低频率的波长），厚度为0.8mm。测量结果表明，返回损耗超过10 dB的阻抗带宽为2.27-2.65 GHz和4.89-6.02 GHz。天线具有全向辐射图案，并且两个电平和H平面具有较低的十字极化水平。平均增益分别在2.4和5GHz带中达到2.4和3.3 dBi。天线紧凑且易于制造，可用于小型全向WLAN终端设备。

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