Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 68, Issue 10, Pages 6893-6905Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2020.2993096
Keywords
Rectennas; Couplers; Wireless communication; Data communication; Receiving antennas; Rectifying circuits; Multifunctional rectenna; multipolarization; simultaneous wireless information and power transfer (SWIPT); two-port rectenna
Funding
- National Natural Science Foundation of China [51907130, 61931009]
- Postdoctoral Science Foundation of China [20504153007]
- Sichuan Provincial Overseas Cooperation [2020YFH0091]
- Fundamental Research Funds for the Central Universities [20826041C4085]
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A multipolarization rectenna, consisting of a two-port antenna fed by an orthogonal hybrid coupler and a medium-power rectifying circuit, is proposed. The orthogonal hybrid coupler has realized good isolation (S-12 or S-21 < -15 dB) between the two ports, which can be, respectively, connected to rectifying circuit and/or communication device for simultaneous wireless information and power transfer (SWIPT). Due to the symmetry of the coupler, the proposed rectenna can work at multipolarization modes, i.e., the circular polarization (CP) for the single-port operation and the linear polarization (LP) for the dual-port operation. Besides, a medium-power rectifying circuit is proposed, where its maximum radio frequency (RF) to direct current (dc) power conversion efficiencies is 53.6% (simulated) and 51.1% (experimental) at the input power of 0 and 0.5 dBm, respectively. By using the coupler, the conversion efficiency and impedance matching of the rectenna can be significantly improved. In addition, the power division between the two ports is considered at different modes. Compared with other rectennas, the proposed multifunctional rectenna has merits of multiple polarizations and multimode, which can therefore be used for the incoming waves in arbitrary polarization for SWIPT and cope with the uncertainty in real-world communication environments.
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