Generation of a beamed wave using a phased array antenna

Takano, Tadashi; Umemura, Takashi; Shibata, Kuniaki; Saegusa, Kenji

doi:10.1109/ursiap-rasc.2016.7601247

Cited by 4 publications

(9 citation statements)

References 2 publications

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“…Quasioptical (QO) theory is adopted in [131] and [132] and to improve the beam efficiency. At the transmitter side, a 4 × 4 5.8 GHz microstrip patch antenna array of 16 active and independent channels with beamforming and beamsteering capabilities with an output power level in the range of 25 W and 32 W is adopted [6], [133]. A 5.1 GHz Local Oscillator (LO) and an Intermediate Frequency (IF) of 0.7 GHz is used; the later is up-converted by a mixer to 5.8 GHz.…”

Section: Wpt Transmittermentioning

confidence: 99%

RF Energy Harvesting and Wireless Power Transfer for Energy Autonomous Wireless Devices and RFIDs

Niotaki

Carvalho

Georgiadis³

et al. 2023

IEEE J. Microw.

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Radio frequency (RF) energy harvesting and wireless power transmission (WPT) technologies -both near-field and far-field-have attracted significant interest for wireless applications and RFID systems. We already utilize near-field WPT products in our life and it is expected that RF EH and far-field WPT systems can drive the future low-power wireless systems. In this article, we initially present a brief historical overview of these technologies. The main technical challenges of rectennas and WPT transmitters are discussed. Furthermore, this paper presents the recent advances on the development of these technologies, including the possibility of powering RFID systems through the millimeter wave power from 5G networks, the trends in flexible rectennas design and the technological developments on the simultaneous wireless information and power transfer (SWIPT).

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Section: Wpt Transmittermentioning

confidence: 99%

RF Energy Harvesting and Wireless Power Transfer for Energy Autonomous Wireless Devices and RFIDs

Niotaki

Carvalho

Georgiadis³

et al. 2023

IEEE J. Microw.

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“…A phased array antenna composed of 4x4 microstrip patches was developed to perform beamforming and beamsteering, by controlling the current distribution of each element. These were respectively implemented according to the principles found in [13] and [14].…”

Section: Antenna Array and Dielectric Lensmentioning

confidence: 99%

“…6b. By knowing the g function, the backscattered pilot signal can be decoded in real time and an accurate estimation of the node's available RF input power can be taken by inverting (13). This way, the nodes can also be considered as real-time passive wireless power probes.…”

Section: Backscatter Modulator With Ring Oscillatormentioning

confidence: 99%

“…Using this antenna, a study was performed for understanding how to generate different gaussian beams, according to the project's needs. The beamforming was achieved by altering each elements' current distribution [13], whose results are described in Table 2. The Firstly, the elements were separated in groups, according to their distance from the antenna's central point.…”

Section: Microstrip Patch Phased-array Antennamentioning

confidence: 99%

“…The first of which is a 4x4 microstrip patch phased-array antenna. By controlling each elements' current distribution, beamforming [13] and beamsteering [14] can be implemented. This is fed by a transmitter that follows a heterodyne architecture, that allow an independent control of each element and can provide a maximum of 2W per element.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Charging Mobile Devices in Indoor Environments

Matos¹,

Pereira²,

Ribeiro³

et al. 2022

Preprint

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Wireless power transfer promises to revolutionize the way we use and power mobile devices. However, low transfer efficiencies prevent this technology from seeing wide scale real-world adoption. The aim of this work is to use quasioptics to develop a system composed of a dielectric lens fed by a phased array to reduce spillover losses, increasing the beam efficiency, while working on the antenna system’s Fresnel zone. The DC-RF electronics, digital beamforming and beam-steering by an FPGA, and radiating 4x4 microstrip patch phased array have been developed and experimented upon, while the lens has been designed and simulated. This paper details these preliminary results, where the phased array radiation pattern was measured, showing that the beam is being generated and steered as expected, prompting the lens construction for the complete system experimentation.

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Phase Adjustment for Beamforming Arbitrarily-Shaped Phased Arrays

Pereira

Carvalho

2022

2022 52nd European Microwave Conference (EuMC)

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Generation of a beamed wave using a phased array antenna

Cited by 4 publications

References 2 publications

RF Energy Harvesting and Wireless Power Transfer for Energy Autonomous Wireless Devices and RFIDs

RF Energy Harvesting and Wireless Power Transfer for Energy Autonomous Wireless Devices and RFIDs

Charging Mobile Devices in Indoor Environments

Phase Adjustment for Beamforming Arbitrarily-Shaped Phased Arrays

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