Millimeter-wave ink-jet printed RF energy harvester for next generation flexible electronics

Bito, Jo; Palazzi, Valentina; Hester, Jimmy; Bahr, Ryan; Alimenti, F.; Mezzanotte, P.; Roselli, L.; Tentzeris, Manos M.

doi:10.1109/wpt.2017.7953871

Cited by 34 publications

(42 citation statements)

References 6 publications

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“…A novel design approach has been utilized to increase the antenna's gain on-body. Higher gain [5], and radiation efficiency [8] has been achieved compared to previous flexible millimeter-wave antennas.…”

Section: Introductionmentioning

confidence: 93%

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Millimeter-Wave Textile Antenna for on-Body RF Energy Harvesting in Future 5G Networks

Wagih

Weddell

Beeby

2019

2019 IEEE Wireless Power Transfer Conference (WPTC)

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Millimeter-Wave (mmWave) bands will be a key part of future 5G networks, with the 26 and 28 GHz bands being introduced first. The wide bandwidth aims to solve traffic-related issues. The projected high base-station density, highly directive transmitters, and the wide bandwidth make it a very promising RF energy harvesting (RFEH) source. Broadband antennas are necessary to harvest power efficiently from the full spectrum. This work presents the first antenna on textile for wearable ambient RFEH in the 26 GHz and 28 GHz bands. The antenna has an impedance bandwidth from 20 to 30 GHz, and exhibits a peak on-body gain of 7 dB with an omnidirectional radiation pattern for capturing ambient RF energy. The radiation efficiency on-and off-body was observed to be at least 40% and 60% respectively, between 24 and 30 GHz. A two-line microstrip dielectric characterization of the textile substrate in the mmWave band has been performed. The antenna has been fabricated on a 310 μm woven polyester substrate using etched ultra-thin Polyimide copper laminates with a minimum feature size of 150μm. A high robustness against human proximity has been demonstrated with a stable bandwidth and improved gain.

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Section: Introductionmentioning

confidence: 93%

“…Rectifying antennas (rectennas) are the key component in an RFEH or WPT system. Planar patch rectenna arrays [4], [5], and a substrate-integrated waveguide (SIW) rectenna [6] have previously been presented for the 24 GHz Industrial Scientific Medical (ISM) band, with a 0.6 V DC output from 10 mW of incident mmWave power [4].…”

Section: Introductionmentioning

confidence: 99%

Millimeter-Wave Textile Antenna for on-Body RF Energy Harvesting in Future 5G Networks

Wagih

Weddell

Beeby

2019

2019 IEEE Wireless Power Transfer Conference (WPTC)

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“…In the circuit topology illustrated in Fig. 5, two diodes are used to increase the output voltage and provide full-wave rectification [10]. The voltage doubler rectifier exhibits lower conversion efficiency for the same level of input RF power, when compared to the shunt configuration, due to twice the diode loss.…”

Section: Voltage-doubler Configurationmentioning

confidence: 99%

“…Various rectifier and rectenna designs have been proposed in the existing literature. Jo Bito et al [10] demonstrated a flexible, ink-jet printed millimetre-wave rectenna at 24 GHz for wearable IoT applications. They reported 2.5 V DC voltage at an input RF power of 18 dBm.…”

Section: Introductionmentioning

confidence: 99%

Wireless Power Transfer System for Battery-Less Sensor Nodes

et al. 2020

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For the first time, the design and implementation of a fully-integrated wireless information and power transfer system, operating at 24 GHz and enabling battery-less sensor nodes, is presented in this paper. The system consists of an RF power source, a receiver antenna array, a rectifier, and a batteryless sensor node which communicates via backscatter modulation at 868 MHz. The rectifier circuits use commercially available Schottky diodes to convert the RF power to DC with a measured efficiency of up to 35%, an improvement of ten percentage points compared with previously reported results. The rectifiers and the receive antenna arrays were jointly designed and optimised, thereby reducing the overall circuit size. The battery-less sensor transmitted data to a base station realised as a GNU Radio flow running on a bladeRF Software Defined Radio module. The whole system was tested in free-space in laboratory conditions and was capable of providing sufficient energy to the sensor node in order to enable operation and wireless communication at a distance of 0.15 metres.

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“…a combination of an antenna and a rectifier. Jo Bito et al [5] presented a flexible, inkjet-printed mmW rectenna with maximum output voltage of 2.5 V with 18 dBm of input power at 24 GHz for wearable IoT applications. Daskalakis et al [6] developed a 24 GHz rectenna on paper substrate with RF-DC conversion efficiency of 32.5% at 15 dBm input power for RFID applications.…”

Section: Introductionmentioning

confidence: 99%

Flexible Rectennas for Wireless Power Transfer to Wearable Sensors at 24 GHz

Malik

Doychinov

Zaidi

et al. 2019

2019 Research, Invention, and Innovation Congress (RI2C)

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This paper presents the design and implementation of efficient & compact flexible rectennas (antenna + rectifier) for wireless power transfer to wearable IoT sensor nodes at 24 GHz. Two different rectifier configurations i.e. shunt and voltage doubler have been analyzed for performance comparison. Experimental results of complete rectenna have also been demonstrated for conformal surfaces. The proposed flexible rectifiers is fabricated through conventional PCB manufacturing method. Measured RF-DC conversion efficiency of 31% and DC voltage of up to 2.4 V is achieved for 20 dBm input power across an optimal load resistance of 300Ω at 24 GHz.

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Millimeter-wave ink-jet printed RF energy harvester for next generation flexible electronics

Cited by 34 publications

References 6 publications

Millimeter-Wave Textile Antenna for on-Body RF Energy Harvesting in Future 5G Networks

Millimeter-Wave Textile Antenna for on-Body RF Energy Harvesting in Future 5G Networks

Wireless Power Transfer System for Battery-Less Sensor Nodes

Flexible Rectennas for Wireless Power Transfer to Wearable Sensors at 24 GHz

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