A Dual Circularly Polarized 2.45-GHz Rectenna for Wireless Power Transmission

Abstract

International audienceA 2.45-GHz rectifying antenna (rectenna) using a compact dual circularly polarized (DCP) patch antenna with an RF-dc power conversion part is presented. The DCP antenna is coupled to a microstrip line by an aperture in the ground plane and includes a bandpass filter for harmonic rejections. It exhibits a measured bandwidth of 2100 MHz (10 dB return loss) and a 705-MHz CP bandwidth (3 dB axial ratio). The maximum efficiency and dc voltage are respectively equal to 63% and 2.82 V over a resistive load of 1600 Omega for a power density of 0.525 mW/cm(2

Ism Band Rectenna Using a Ring Loaded Monopole

“…To this regard, the key component is a rectifying antenna (rectenna) [1][2][3][4][5][6][7][8][9][10][11], which consists of an antenna and a rectifier. The antenna plays the role of the EM harvester, it acts as a transducer between a free propagating EM wave and a guided one; while, the rectifier converts the energy collected by the antenna into a DC signal.…”

“…A 2.45 GHz bi-layer rectenna using a compact dual circularly polarized patch antenna is proposed in [7]. The measured conversion efficiency is of about 63% for a power density incident on the antenna of 525 µW/cm 2 .…”

A Review on Wireless Power Transfer in Free Space and Conducting Lossy Media

“…[81] Truncated patch, [82] two crossed slots introduced to the ground of a patch antenna and coupled on a microstrip feed line/Overcomes the limitations of rectenna orientation.…”

A Compact Dual-Band Rectenna for GSM900 and GSM1800 Energy Harvesting

“…It collects the RF signal and converts it into dc power. Some reported rectennas achieve high efficiency at single frequency, such as 2.45 GHz [1,2]. To harvest more ambient RF energy, various dual-band rectennas [3], broadband rectennas [4,5], and multiband rectennas [6] are reported in recent years.…”