Reverse link signaling via receive antenna impedance modulation
US-2015171636-A1 · Jun 18, 2015 · US
Method and apparatus with negative resistance in wireless power transfers
US9190875B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9190875-B2 |
| Application number | US-26652508-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 6, 2008 |
| Priority date | May 13, 2008 |
| Publication date | Nov 17, 2015 |
| Grant date | Nov 17, 2015 |
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Abstract
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Exemplary embodiments are directed to wireless power transfer. Antenna circuits use negative resistance to offset resistance from other elements in the circuit. The antenna circuits include an antenna for coupling with a near field radiation at a resonant frequency and a capacitance element connected in series with the receive antenna. The antenna circuits also include a negative resistance generator connected in series with the capacitance element. In the case of a receive antenna, and possibly a repeater antenna, a load is connected in series with the negative resistance generator. The load may draw power from the near field radiation when the antenna circuit oscillates near the resonant frequency. In the case of a transmit antenna, a signal generator is coupled in series with the antenna for applying signal power to the antenna circuit to generate an electromagnetic field at the resonant frequency creating a coupling-mode region within a near field.
First claim
Opening claim text (preview).
What is claimed is: 1. A wireless power-receive circuit, comprising: a receive antenna configured to receive power from an electromagnetic field; a capacitance element operably coupled with the receive antenna and comprising a capacitance value and an equivalent series resistance value; and a negative resistance generator operably coupled in series with the capacitance element and coupled to a load, the load configured to draw power from the electromagnetic field, the negative…
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- G06K7/0008Primary
Physics · mapped topic
Electricity · mapped topic
Physics · mapped topic
Electricity · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US9190875B2 cover?
- Exemplary embodiments are directed to wireless power transfer. Antenna circuits use negative resistance to offset resistance from other elements in the circuit. The antenna circuits include an antenna for coupling with a near field radiation at a resonant frequency and a capacitance element connected in series with the receive antenna. The antenna circuits also include a negative resistance gen…
- Who is the assignee on this patent?
- Mohammadian Alireza Hormoz, Qualcomm Inc
- What technology area does this patent fall under?
- Primary CPC classification G06K7/0008. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Nov 17 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).