A Pattern-Reconfigurable Single-Element Microstrip Antenna

Siti Nailah Mastura Zainarry, S. J. Chen, C. Fumeaux
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引用次数: 10

Abstract

A pattern-reconfigurable antenna based on a simple single-element microstrip antenna is presented. The antenna has a shorting wall near the patch center to introduce two slightly shifted resonances at its two radiating edges. A stub-loaded varactor is mounted at one of the patch radiating edges to obtain pattern reconfigurability, by electronically detuning the frequency of one of the resonances. Preliminary measurements of a prototype demonstrate that the antenna exhibits beam squint up to 39° on one side of the patch at the center frequency of 2.40 GHz, when the bias voltage is tuned from 18 to 3.8 V. Also for a fixed bias voltage of 6.3 V, the beam can scan from 8 ° to 43 ° as a function of frequency within the operation bandwidth from 2.35 to 2.45 GHz. The presented results validate the concept which will be further extended to scan beam on two sides with frequency selectivity.
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一种模式可重构单元件微带天线
提出了一种基于单元件微带天线的模式可重构天线。天线在贴片中心附近具有短壁,以在其两个辐射边缘处引入两个略微移位的谐振。通过电子失谐其中一个共振的频率,在其中一个贴片辐射边缘安装一个存根负载变容管,以获得图案可重构性。样机的初步测量表明,在中心频率为2.40 GHz时,当偏置电压从18 V调至3.8 V时,天线在贴片一侧的波束斜视可达39°。在固定偏置电压为6.3 V时,波束的扫描范围为8°~ 43°,工作带宽为2.35 ~ 2.45 GHz。所得结果验证了这一概念,并将其进一步推广到具有频率选择性的两侧扫描波束。
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