Radio-frequency energy transfers or harvesting based on combining direct current signals from multiple antennas
First Claim
Patent Images
1. A radio-frequency power receiving device comprising:
- multiple RF antennas having a common resonant operating frequency;
multiple controllable rectifying circuits connected to the multiple RF antennas in a one-to-one correspondence, wherein each one of the controllable rectifying circuits converts an RF signal from a corresponding one of the RF antennas into a corresponding direct-current signal based on an amplitude control signal, producing multiple direct-current signals in one-to-one correspondence with the multiple RF antennas;
a controllable switching network connected to the multiple controllable rectifying circuits, wherein the switching network controllably combines the multiple corresponding direct-current signals based on switch control signals to produce a combined direct-current output signal; and
a control unit connected to the multiple controllable rectifying circuits and connected to the controllable switching network, wherein the control unit i) sends to the multiple controllable rectifying circuits multiple amplitude control signals to control amplitude gains of the rectifying circuits, wherein the amplitude control signals are derived from direct current amplitude signals received from the multiple controllable rectifying circuits, and ii) sends to the controllable switching network the switch control signals, wherein the switch control signals are derived from direct current amplitude signals received from the multiple controllable rectifying circuits.
2 Assignments
0 Petitions
Accused Products
Abstract
A radio-frequency power receiving device has RF antennas connected to multiple controllable rectifying circuits to produce corresponding DC signals which are combined in a controllable switching network to produce a combined DC output. A control unit determines an amplitude control signal that controls each rectifying circuit and also determines switch control signals that control a switching network. The switching network controllably combines the direct-current signals to combine the multiple corresponding direct-current signals in series, in parallel, or in a combination of series and parallel.
-
Citations
6 Claims
-
1. A radio-frequency power receiving device comprising:
-
multiple RF antennas having a common resonant operating frequency; multiple controllable rectifying circuits connected to the multiple RF antennas in a one-to-one correspondence, wherein each one of the controllable rectifying circuits converts an RF signal from a corresponding one of the RF antennas into a corresponding direct-current signal based on an amplitude control signal, producing multiple direct-current signals in one-to-one correspondence with the multiple RF antennas; a controllable switching network connected to the multiple controllable rectifying circuits, wherein the switching network controllably combines the multiple corresponding direct-current signals based on switch control signals to produce a combined direct-current output signal; and a control unit connected to the multiple controllable rectifying circuits and connected to the controllable switching network, wherein the control unit i) sends to the multiple controllable rectifying circuits multiple amplitude control signals to control amplitude gains of the rectifying circuits, wherein the amplitude control signals are derived from direct current amplitude signals received from the multiple controllable rectifying circuits, and ii) sends to the controllable switching network the switch control signals, wherein the switch control signals are derived from direct current amplitude signals received from the multiple controllable rectifying circuits. - View Dependent Claims (2, 3, 4, 5, 6)
-
Specification