On the Use of Tunable Power Splitter for Simultaneous Wireless Information and Power Transfer Receivers
Date
2018Author
Quddious, AbdulAbbasi, Muhammad Ali Babar
Tariq, Muhammad Haroon
Antoniades, Marco A.
Vryonides, Photos
Nikolaou, Symeon
ISSN
1687-58691687-5877
Source
International Journal of Antennas and PropagationVolume
2018Pages
1-12Google Scholar check
Metadata
Show full item recordAbstract
The use of a tunable power splitter (PS) as a constituent component of a simultaneous wireless information and power transfer (SWIPT) system is discussed. Two varactor diodes are used to achieve a tunable output power ratio P 2 : P 3 varying from 1 : 1 to 1 : 10 under good matching conditions. The SWIPT system that operates at 2.4 GHz consists of a typical patch antenna, cascaded with the tunable PS, and a voltage doubler rectifier. The constituent components were implemented and tested as stand-alone devices and were subsequently combined in a measurement system using interconnectors. The effect of the tunable PS was explored with respect to the SNR measurements on the port that is intended for the information decoding receiver and the DC voltage measurements on the termination load of the rectifier that is connected directly on the energy harvesting port of the tunable PS. A spectrum analyzer is used for the SNR measurements while the input power is controlled using a signal generator. Both wireless power transmission and on-board measurements verify that the harvested energy can be maximized by using the minimum SNR at the information decoding branch at the expense of DC power consumption required for the biasing of the varactor diodes.