Antenna system with return path tuning and loop element
First Claim
1. Electronic device antenna structures, comprising:
- an antenna ground;
a first antenna resonating element;
an antenna feed coupled between the antenna ground and the first antenna resonating element, wherein the antenna feed has a positive antenna feed terminal and a ground antenna feed terminal; and
a second antenna resonating element interposed between the first antenna resonating element and the antenna ground that has a first end coupled to the positive antenna feed terminal and a second end coupled to the ground antenna feed terminal, wherein the first antenna resonating element comprises an inverted-F antenna resonating element, the second antenna resonating element comprises a loop antenna resonating element, a portion of the loop antenna resonating element overlaps a portion of the antenna ground, the first antenna resonating element comprises a portion of a peripheral conductive electronic device housing member that is formed at an exterior of an electronic device, and the portion of the peripheral conductive electronic device housing member is separated from the antenna ground by a first dielectric gap having a first length and is separated from the portion of the antenna ground that overlaps the portion of the loop antenna resonating element by a second gap having a second length that is less than the first length.
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Accused Products
Abstract
Electronic devices may include radio-frequency transceiver circuitry and antenna structures. The antenna structures may include a dual arm inverted-F antenna resonating element and an antenna ground. An antenna feed may be coupled between the inverted-F antenna resonating element and the antenna ground. An adjustable component such as an adjustable inductor may be coupled between the inverted-F antenna resonating element and the antenna ground in parallel with the antenna feed. The adjustable component may be operable in multiple states such as an open circuit state, a short circuit state, and a state in which the adjustable component exhibits a non-zero inductance. Antenna bandwidth can be broadened by coupling a loop antenna resonating element across the antenna feed. A portion of the antenna ground may overlap the loop antenna resonating element to further enhance antenna bandwidth.
177 Citations
16 Claims
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1. Electronic device antenna structures, comprising:
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an antenna ground; a first antenna resonating element; an antenna feed coupled between the antenna ground and the first antenna resonating element, wherein the antenna feed has a positive antenna feed terminal and a ground antenna feed terminal; and a second antenna resonating element interposed between the first antenna resonating element and the antenna ground that has a first end coupled to the positive antenna feed terminal and a second end coupled to the ground antenna feed terminal, wherein the first antenna resonating element comprises an inverted-F antenna resonating element, the second antenna resonating element comprises a loop antenna resonating element, a portion of the loop antenna resonating element overlaps a portion of the antenna ground, the first antenna resonating element comprises a portion of a peripheral conductive electronic device housing member that is formed at an exterior of an electronic device, and the portion of the peripheral conductive electronic device housing member is separated from the antenna ground by a first dielectric gap having a first length and is separated from the portion of the antenna ground that overlaps the portion of the loop antenna resonating element by a second gap having a second length that is less than the first length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. Electronic device antenna structures, comprising:
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an antenna ground; an inverted-F antenna resonating element having a first arm that is configured to resonate in high band frequency range and a second arm that is configured to resonate in a low band frequency range; an antenna feed coupled between the antenna ground and the inverted-F antenna resonating element, wherein the antenna feed has a positive antenna feed terminal and a ground antenna feed terminal, the first arm extends from a first side of the positive antenna feed terminal and in a given plane, and the second arm extends from a second side of the positive antenna feed terminal and in the given plane; and a loop antenna resonating element interposed between the inverted-F antenna resonating element and the antenna ground that has a first end coupled to the positive antenna feed terminal and a second end coupled to the ground antenna feed terminal, wherein the loop antenna resonating element extends from the first side of the positive antenna feed terminal, an entirety of the loop antenna resonating element extends along the first side of the positive antenna feed terminal, and the loop antenna resonating element is configured to broaden the high band frequency range in which the first arm resonates.
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16. Electronic device antenna structures, comprising:
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an antenna ground; a first antenna resonating element; an antenna feed coupled between the antenna ground and the first antenna resonating element, wherein the antenna feed has a positive antenna feed terminal and a ground antenna feed terminal; and a second antenna resonating element that has a first end coupled to the positive antenna feed terminal and a second end coupled to the ground antenna feed terminal, wherein the first antenna resonating element has a first arm configured to resonate in a low band frequency range and a second arm configured to resonate in a high band frequency range, and the second antenna resonating element is configured to broaden the high band frequency range in which the second arm of the first antenna resonating element resonates.
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Specification