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access icon free Dual-band CPW rectenna for low input power energy harvesting applications

A dual-frequency band low input power rectenna is proposed in this study. The rectenna is comprised of a co-planar waveguide (CPW) rectifier integrated with a rectangular split ring antenna loaded by a spiral strip line. A single diode series connection topology is used to miniaturise the losses at low input power. A spiral coil in addition to two short circuit stubs are used as a matching network for maximum power transfer between the antenna and the rectifying circuit. The proposed rectenna operates at low input power with relatively high measured RF-DC conversion efficiency up to at input power of at the first resonant frequency and at at the second operating frequency with a resistive load of . The measured rectenna sensitivity (the rectenna ability to receive low power with acceptable conversion efficiency) reaches up to with a conversion efficiency of and at and , respectively, and a DC output voltage of . The measured efficiency is over from to and from to at and , respectively.

http://iet.metastore.ingenta.com/content/journals/10.1049/iet-cds.2020.0013
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content/journals/10.1049/iet-cds.2020.0013
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