Abstract
This paper presents a linear-polarization-insensitive rectenna for the ground-to-air microwave power transmission (MPT). With an integration of a hybrid coupler and a dual-linearly-polarized (DLP) antenna, a linearly-polarized (LP) incident wave can be decomposed by the antenna polarization tilts into the horizontally-polarized (HP) and the vertically-polarized (VP) components, correspondingly, which are then distributed evenly through the hybrid coupler as the inputs of two successive lumped rectifiers. Thus, RF-to-dc power conversion efficiencies (PCEs) of the presented DLP rectenna maintain insensitive to its incident LP polarization tilts. An aperture-coupled feeding mechanism and lumped matching networks are employed to enable the compact DLP rectenna design for practicality. Both theoretical analysis and experimental results validate that the RF-to-dc PCEs of the DLP rectenna keeps stable high regardless of its LP polarization tilts, which demonstrates a prospect for the ground-to-air MPT applications.
Highlights
The ground-to-air microwave power transmission (MPT) has gained increasingly attentions as it can continuously supply dc power to an unmanned aerial vehicle (UVA) [1]–[3] shown in Fig. 1, where RF-to-dc power conversion efficiency (PCE) of an onboard rectenna is commonly a critical concern [4], [5]
Both theoretical analysis and experimental results validate that the RF-to-dc PCEs of the DLP rectenna maintains stable high regardless of its LP polarization tilts, which demonstrates a prospect for the future ground-to-air MPT applications
This paper presents an LP-insensitive rectenna for groundto-air MPT
Summary
The ground-to-air microwave power transmission (MPT) has gained increasingly attentions as it can continuously supply dc power to an unmanned aerial vehicle (UVA) [1]–[3] shown in Fig. 1, where RF-to-dc power conversion efficiency (PCE) of an onboard rectenna is commonly a critical concern [4], [5]. Mismatch loss in wireless power link and deteriorates the RF-to-dc PCEs of an onboard rectenna of whole ground-toair MPT system. On the basis of the shared-aperture DLP and the two lumped rectifiers, an LP-insensitive DLP rectenna can be realized by integrating the hybrid coupler Both theoretical analysis and experimental results validate that the RF-to-dc PCEs of the DLP rectenna maintains stable high regardless of its LP polarization tilts, which demonstrates a prospect for the future ground-to-air MPT applications
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