Electronic device with shared antenna structures and balun
First Claim
1. An electronic device, comprising:
- antenna structures that include an inverted-F antenna having a resonating element arm, an antenna ground, an antenna feed path, and an antenna return path coupled between the resonating element arm and the antenna ground;
non-near-field communications circuitry coupled to the antenna structures;
near-field communications circuitry, wherein the near-field communications circuitry handles near-field communications using a loop antenna formed from the antenna structures, the loop antenna including a portion of the antenna return path of the inverted-F antenna; and
a balun that couples the near-field communications circuitry to the antenna structures.
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Accused Products
Abstract
An electronic device may be provided with shared antenna structures that can be used to form both a near-field-communications antenna such as a loop antenna and a non-near-field communications antenna such as an inverted-F antenna. The antenna structures may include conductive structures such as metal traces on printed circuits or other dielectric substrates, internal metal housing structures, or other conductive electronic device housing structures. A main resonating element arm may be separated from an antenna ground by an opening. A non-near-field communications antenna return path and antenna feed path may span the opening. A balun may have first and second electromagnetically coupled inductors. The second inductor may have terminals coupled across differential signal terminals in a near-field communications transceiver. The first inductor may form part of the near-field communications loop antenna.
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Citations
21 Claims
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1. An electronic device, comprising:
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antenna structures that include an inverted-F antenna having a resonating element arm, an antenna ground, an antenna feed path, and an antenna return path coupled between the resonating element arm and the antenna ground; non-near-field communications circuitry coupled to the antenna structures; near-field communications circuitry, wherein the near-field communications circuitry handles near-field communications using a loop antenna formed from the antenna structures, the loop antenna including a portion of the antenna return path of the inverted-F antenna; and a balun that couples the near-field communications circuitry to the antenna structures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An electronic device, comprising:
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an antenna resonating element and antenna ground that form a non-near-field communications antenna; non-near-field communications circuitry coupled to the non-near-field communications antenna, wherein the non-near-field communications circuitry wirelessly communicates using the non-near-field communications antenna; near-field communications circuitry; and a balun coupled to the near-field communications circuitry, wherein the balun includes an inductor, the near-field communications circuitry wirelessly communicates using a near-field communications antenna, and the near-field communications antenna is formed from the inductor, a portion of the antenna resonating element, and a portion of the antenna ground. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. Apparatus, comprising:
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an antenna ground; conductive peripheral electronic device housing structures separated from the ground by an opening; a non-near-field communications antenna return path that spans the opening; a non-near-field communications antenna feed path that spans the opening, wherein the antenna ground, the conductive peripheral electronic device housing structures, the non-near-field communications antenna return path, and the non-near-field communications antenna feed path form a non-near-field communications antenna; a balun having a first inductor and having a second inductor that is electromagnetically coupled to the first inductor; and a near-field communications loop antenna that includes the first inductor and the antenna ground. - View Dependent Claims (21)
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Specification