In the article, a dual and wide band antenna array suitable for RF rectenna applications was synthesized and global rectenna systems are presented. The array consists of two bowtie-shaped patches, printed on the one side of a dielectric slab (FR4). On the other side of the slab, an aperture-textured metallic ground layer, is printed. Examples of full-wave rectifiers connected, through matching networks, to the antenna elements and forming integrated rectenna systems for radio-frequency (RF) power harvesting at 868 MHz, from 920 to 960 MHz and at 1.8 GHz, are presented. Statistical results over frequency and the directions of arrival (DoAs) of incoming waves were received showing, at the rectifier, mean direct current (DC) voltage of 580 mV, and mean power of 58 μW, for circularly polarized waves of field intensity of 1.8 V/m. The DC voltage can reach 800 mV, the power 120 μW and the efficiency 68% when the waves come from DoAs of maximum antenna’s gain. Due to the wideband performance of the antenna, it could be used at various frequency slots as long as the matching network’s operation frequency is changed. Thus the proposed rectennas could be suitable for energizing low-power sensors or at least to charge their batteries.
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机译：在该物品中，合成了适用于RF reDenNA应用的双和宽带天线阵列，并呈现全局预纤维系统。阵列由两个蝴蝶结形贴片组成，印在电介质板的一侧（FR4）。在板坯的另一侧，印刷光圈纹理的金属地层。呈现通过匹配网络连接到天线元件和以868MHz的射频（RF）功率收集的用于天线元件，从920到960MHz和1.8GHz处形成集成的Enctenna系统。在整流器上显示频率和到达的频率方向（DOAs）的统计结果显示，在整流器，平均直流（DC）电压为580 mV，平均功率为58μW，用于圆极化波的场强度为1.8 v / m。当波浪来自最大天线增益的DOA时，直流电压可以达到800 mV，功率120μW和效率为68％。由于天线的宽带性能，只要匹配网络的操作频率改变，它可以在各种频率插槽处使用。因此，所提出的预直线可以适合于激励低功率传感器或至少为其电池充电。
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