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首页> 外文期刊>International Journal of Natural and Engineering SciencesbElectronic resource >Compact Circularly Polarized Slot Antenna with a Wide Impedance Bandwidth for VSWR≤ 1.5
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Compact Circularly Polarized Slot Antenna with a Wide Impedance Bandwidth for VSWR≤ 1.5

机译：VSWR≤1.5的宽阻抗带宽的紧凑型圆极化缝隙天线

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摘要

A new design of circularly polarized (CP) slot antenna is presented in this paper that operates across 3.09–11.31 GHz with an impedance bandwidth (IBW) of 114.1% for VSWR≤2. Moreover with applying a tuning stub to the feed line the impedance matching of the antenna is enhanced that leads to a bandwidth of 107.5% (3.32-11.04 GHz) for VSWR≤1.5. The CP antenna consists of a rectangular radiation patch which is fed through a coplanar waveguide (CPW), three asymmetric rectangular slots on the ground plane and a tuning stub added to the feed-line. Furthermore two slots at center of the patch have been used to excite two orthogonal resonant modes for circular-polarization radiation, also to widen the CP bandwidth a rectangular branch strip is attached to top end of the radiation patch. The proposed antenna exhibits CP bandwidth of 41.93% across 4.88–7.52 GHz, which incorporates the WLAN band. In addition, the antenna has a significantly compact volume of 25×25×0.8 mm3. The measured and simulated results confirm the usefulness of the antenna for practical applications.
机译：本文介绍了一种新的圆极化（CP）缝隙天线设计，它在3.09–11.31 GHz的频率范围内工作，对于VSWR≤2，阻抗带宽（IBW）为114.1％。此外，通过在馈电线上应用调谐短截线，可以增强天线的阻抗匹配，从而在VSWR≤1.5时获得107.5％（3.32-11.04 GHz）的带宽。 CP天线由一个矩形辐射贴片组成，该辐射贴片通过一个共面波导（CPW）馈电，在接地面上有三个不对称的矩形缝隙，并在馈电线上增加了一个调谐棒。此外，已将贴片中心的两个狭缝用于激发圆偏振辐射的两个正交共振模式，也为了扩大CP带宽，在辐射贴片的顶端连接了一个矩形分支带。拟议中的天线在4.88–7.52 GHz的频率范围内具有41.93％的CP带宽，其中包含WLAN频段。此外，天线的体积非常紧凑，仅为25×25×0.8 mm3。测量和模拟结果证实了天线在实际应用中的有用性。

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