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Circularly polarized rectennas operating at X-band are studied in this paper. The quasi-square patches fed by aperture coupling are used as the circularly polarized receiving antennas, which are easily matched and integrated with the circuits of rectennas. The: double-layer structure not only minimizes the size of the rectennas but also decreases the effects of the circuits on the antenna. The receiving elements have broader bandwidth and higher gain than the single-layer patches. Two rectennas operating at 10GHz are designed, fabricated and measured. The voltage of 3.86V on a load of 200Ω is measured and a high RF-DC conversion efficiency of 75% is obtained at 9.98GHz. It is convenient for this kind of rectennas to form large arrays for high power applications. 相似文献
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用于整流天线的口径耦合圆极化微带天线的设计与实验 总被引:4,自引:0,他引:4
提出了一种用于整流天线的新型圆极化微带天线形式,此天线采用单端口径耦合馈电,易与整流电路集成和匹配。利用电磁场仿真软件分析了天线参数对天线性能的影响,设计并加工了一个圆极化天线单元。设计值和实验值较吻合,实验结果表明该天线在10.25GHz具有良好的圆极化特性:在最大方向上圆极化轴比为0.3dB,3dB圆极化带宽达到160MHz,驻波比小于2的带宽达到800MHz。 相似文献
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Potential applicability of CNT and CNT/composites to implement ASEC concept: A review article 总被引:3,自引:0,他引:3
Samantha Wijewardane 《Solar Energy》2009,83(8):1379-2756
It is believed that the successful implementation of the Antenna Solar Energy Conversion (ASEC) to the commercial level would revolutionize the solar energy utilization. Screening suitable materials and technologies by analyzing potential pros and cones all the way to commercial level would conserve much time and resources. Here carbon nanotube (CNT) known as the material of the 21st century is evaluated concerning many aspects to implement ASEC concept. Thermomechanical and electrical properties of CNT as regards to ASEC, interaction of CNT and CNT arrays with optical spectrum and existing and future CNT technologies that have the potential to overcome possible future obstacles are discussed. The economic aspects which govern the future of ASEC concept, with CNT as a basic material are also discussed. 相似文献
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Ka波段整流天线的时域分析 总被引:1,自引:0,他引:1
本文采用时域散射参数法(TDSPM)分析35GHz的整流天线。该方法采用一系列的代数方程代替分布参数模型法中的微分方程组,大大减少了计算量,其计算结果与谐波平衡法(HBM)的结果进行了比较,两者吻合得很好,这说明了时域散射参数法的有效性。通过对电路的优化得到了一种新的整流天线结构,此天线在150mW净输入功率和100Ω的负载电阻下得到60%的转换效率。 相似文献
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一种新型5.8GHz共面带线整流天线的设计研究 总被引:1,自引:0,他引:1
整流天线是微波输电的关键技术之一,提出了一种新型结构的5.8GHz的共面带线整流天线,它具有平行结构,不需要钻孔,便于大规模生产,借助IE3D V10.0、ADS 2003C等高频仿真软件对该整流天线的参数进行了优化加工与设计,试验表明该接收整流转换效率达到了75%,验证了设计的可行性. 相似文献
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