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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >A novel dual-mode patch antenna with pattern diversity and beam-tilting for aircraft applications
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A novel dual-mode patch antenna with pattern diversity and beam-tilting for aircraft applications

机译：一种新颖的具有模式分集和波束倾斜的双模贴片天线，适用于飞机应用

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摘要

A dual-mode patch antenna with pattern diversity that is beam-tilted in a specificdirection is presented. By placing a rectangular metal cavity below the circularpatch and simultaneously shorting one end of the patch, the antennaproduces tilted beams for dual-mode radiation patterns. One pattern is excitedusing a proximity-fed L-shaped probe that generates a beam with a tilt angle of25 from the broadside direction. The second pattern is excited using a coplanarwaveguide (CPW)-based feeding network that generates two beams with atilt angle of θ_(max) = ±45 in the directions of ϕmax = 70 and − 70. The tiltangle can be varied by adjusting the metal cavity's length. A prototype antennafor operation at 2.38 GHz was fabricated and measured. The results indicatethat the overlapped bandwidth (|S_(11)| < −10 dB) for the two patterns is330 MHz (2.22-2.55 GHz). The measured peak gains for the two patterns are6.74-6.94 dBi and 5.82-6.74 dBi, respectively. The isolation between the twoports is 18 dB.
机译：提出了一种具有模式分集的双模式贴片天线，该天线在特定方向上被波束倾斜。通过在圆形贴片下方放置一个矩形金属腔，并同时使贴片的一端短路，天线可产生用于双模辐射方向图的倾斜波束。使用接近进给的L形探头激发一种模式，该探头产生从宽边方向倾斜25度的光束。第二种模式是使用基于共面波导（CPW）的馈电网络激发的，该馈电网络在ϕmax = 70和− 70的方向上产生两个倾斜角为θ_（max）=±45的光束。可通过调节金属来改变倾角腔的长度。制作并测量了用于2.38 GHz工作的原型天线。结果表明，两个模式的重叠带宽（| S_（11）| <-10 dB）为330 MHz（2.22-2.55 GHz）。两种模式的测得峰值增益分别为6.74-6.94 dBi和5.82-6.74 dBi。两个端口之间的隔离度为18 dB。

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