This paper presents a novel ultra‐wideband rectenna which consists of a transparent Vivaldi antenna and a wideband rectifying circuit for radio frequency energy harvesting. The antenna is realized on a 2.2‐mm‐thick soda‐lime glass substrate coated with fluorine‐doped tin oxide of thickness 650 nm. It provides an optical transmittance greater than 80% in the visible region. The rectifying circuit with a cascaded matching network and the Greinacher doubler circuit are fabricated on an FR4 substrate with a thickness of 0.8 mm. The antenna provides the best matching characteristics and the realized peak gain is 3.2 dBi. The designed matching network enables maximum power transfer from the antenna to the rectifier. The rectenna provides a peak power conversion efficiency of 69% for −10 dBm input power. The proposed antenna can be realized on the windscreen of automobiles and glass windows without causing any obstruction to normal view.

中文翻译：

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使用光学透明维瓦尔第天线的超宽带整流天线，用于射频能量收集

本文提出了一种新颖的超宽带整流天线，它由透明的维瓦尔第天线和用于射频能量收集的宽带整流电路组成。该天线在2.2毫米厚的钠钙玻璃基板上实现，该基板上涂有厚度为650 nm的掺氟氧化锡。它在可见光区域的透光率大于80％。具有级联匹配网络的整流电路和Greinacher倍频器电路在厚度为0.8 mm的FR4基板上制造。天线提供了最佳的匹配特性，实现的峰值增益为3.2 dBi。设计的匹配网络可实现从天线到整流器的最大功率传输。对于-10 dBm输入功率，整流天线可提供69％的峰值功率转换效率。