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Circularly polarized D-shaped slot antenna for wireless applications

机译:用于无线应用的圆极化D形缝隙天线

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摘要

A multiband circularly polarized slot antenna for wireless local area networks (WLAN) and worldwide interoperability for microwave access (WiMAX) applications is designed, studied, and fabricated. Using modified ground plane structure, circular polarized characteristics are realized. An open rectangular loop is introduced on the ground plane to generate orthogonal modes at middle resonance frequency. At higher resonance frequency to improve axial ratio bandwidth, a D-shaped radiator is used. Thus, the cooperation of modified ground plane, open loop resonator, and D-shaped radiator improves performance of the antenna at all the required bands. The proposed microstrip antenna generates separate impedance bandwidths to cover frequency bands of WLAN and WiMAX applications. The realized antenna is relatively small in size 40x54mm(2) or 0.26_x0.36_ where _ is the free-space wavelength at the desired first resonant frequency 2.0 GHz and operates over frequency ranges 26% (2.0-2.6 GHz), 8.9% (3.21-3.51GHz), and 50.6% (3.8-6.38GHz). In addition, the antenna exhibits 5% (2.32-2.44GHz), 5.8% (3.3-3.5 GHz), and 5.2% (5.61-5.91GHz) Circular Polarization bandwidth, making it suitable for WLAN and WiMAX applications.
机译:设计,研究和制造了一种用于无线局域网(WLAN)和全球互通性的微波访问的多频带圆极化缝隙天线。使用改进的接地平面结构,可以实现圆极化特性。在接地平面上引入一个开放的矩形环路,以产生处于中间谐振频率的正交模式。在更高的谐振频率下以改善轴向比率带宽,使用了D形辐射器。因此,改进的接地层,开环谐振器和D形辐射器的配合可改善天线在所有所需频段的性能。拟议中的微带天线产生单独的阻抗带宽,以覆盖WLAN和WiMAX应用的频带。所实现的天线尺寸相对较小,为40x54mm(2)或0.26_x0.36_,其中_是所需的第一谐振频率2.0 GHz的自由空间波长,并且在26%(2.0-2.6 GHz),8.9%( 3.21-3.51GHz)和50.6%(3.8-6.38GHz)。此外,该天线具有5%(2.32-2.44GHz),5.8%(3.3-3.5 GHz)和5.2%(5.61-5.91GHz)圆极化带宽,使其适用于WLAN和WiMAX应用。

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