Positive battery terminal antenna ground plane
First Claim
Patent Images
1. An apparatus, comprising:
- a positive terminal of a battery as a ground plane of an antenna, comprising a first electrically conductive external surface with a first surface area;
a negative terminal of a battery, comprising a second electrically conductive external surface with a second surface area; and
an antenna impedance matching circuit, directly electrically connected to a communication circuit, the antenna, and the first electrically conductive external surface of the battery;
wherein the first surface area is greater than the second surface area.
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Abstract
A positive terminal of a battery may act as an antenna ground plane for communicating battery status information. The positive terminal of the battery may include a first electrically conductive external surface with a first surface area. The negative terminal of the battery may include a second electrically conductive external surface with a second surface area less than the first surface area. An antenna impedance matching circuit may electrically connect to a communication circuit, an antenna, and the positive terminal of the battery. Thus the positive terminal of the battery may act as a ground plane for the antenna.
296 Citations
24 Claims
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1. An apparatus, comprising:
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a positive terminal of a battery as a ground plane of an antenna, comprising a first electrically conductive external surface with a first surface area; a negative terminal of a battery, comprising a second electrically conductive external surface with a second surface area; and an antenna impedance matching circuit, directly electrically connected to a communication circuit, the antenna, and the first electrically conductive external surface of the battery; wherein the first surface area is greater than the second surface area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method, comprising:
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providing a positive terminal of a battery as a ground plane of an antenna, comprising a first electrically conductive external surface with a first surface area; providing a negative terminal of a battery, comprising a second electrically conductive external surface with a second surface area less than the first surface area; providing an antenna impedance matching circuit; and electrically connecting the antenna impedance matching circuit directly to the positive terminal of the battery, a communication circuit, and the antenna. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method, comprising:
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providing a negative terminal of a primary alkaline battery, comprising a first surface area; providing a positive terminal of a primary alkaline battery as a ground plane of an antenna, comprising a second surface area greater than the first surface area; providing an antenna impedance matching circuit; electrically connecting the antenna impedance matching circuit to the positive terminal of the battery; electrically connecting the antenna impedance matching circuit to a communication circuit and an antenna; and calculating data relating to the remaining capacity of the battery including corrections for load on the battery related to transmission and reception of data using the communication circuit, the antenna impedance matching circuit, the antenna, and the positive terminal of the primary alkaline battery. - View Dependent Claims (21, 22, 23, 24)
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Specification