Antenna system with tuning from coupled antenna
First Claim
1. Electronic device antenna structures, comprising:
- an antenna ground;
a first antenna resonating element that forms a first antenna with the antenna ground and that is configured to resonate in a first frequency band;
a second antenna resonating element that forms a second antenna with the antenna ground and that is configured to resonate in a second frequency band that is different from the first frequency band, wherein the second antenna is near-field coupled to the first antenna and the second antenna serves as a tunable parasitic antenna resonating element for the first antenna; and
an adjustable component coupled to the second antenna resonating element, the adjustable component being configured to tune the first antenna resonating element within the first frequency band.
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Accused Products
Abstract
Electronic devices may include radio-frequency transceiver circuitry and antenna structures. The antenna structures may form a dual arm inverted-F antenna and an additional antenna such as a monopole antenna sharing a common antenna ground. The antenna structures may have three ports. A first antenna port may be coupled to an inverted-F antenna resonating element at a first location and a second antenna port may be coupled to the inverted-F antenna resonating element at a second location. A third antenna port may be coupled to the additional antenna. An adjustable component may be coupled to the first antenna port to tune the inverted-F antenna. The inverted-F antenna may be near-field coupled to the additional antenna so that the inverted-F antenna may serve as a tunable parasitic antenna resonating element that tunes the additional antenna.
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Citations
22 Claims
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1. Electronic device antenna structures, comprising:
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an antenna ground; a first antenna resonating element that forms a first antenna with the antenna ground and that is configured to resonate in a first frequency band; a second antenna resonating element that forms a second antenna with the antenna ground and that is configured to resonate in a second frequency band that is different from the first frequency band, wherein the second antenna is near-field coupled to the first antenna and the second antenna serves as a tunable parasitic antenna resonating element for the first antenna; and an adjustable component coupled to the second antenna resonating element, the adjustable component being configured to tune the first antenna resonating element within the first frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electronic device, comprising:
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antenna structures having first, second, and third antenna ports, wherein the antenna structures include an antenna ground, an inverted-F antenna resonating element that forms an inverted-F antenna with the antenna ground, and an additional antenna resonating element that forms an additional antenna with the antenna ground, wherein the first and second antenna ports are coupled to different locations on the inverted-F antenna resonating element and wherein the third antenna port is coupled to the additional antenna; wireless circuitry that is coupled to the first, second, and third antenna ports through respective first, second, and third transmission line structures; and a tunable component coupled to the first port, wherein the inverted-F antenna serves as a tunable parasitic antenna resonating element for the additional antenna during transmission and reception of wireless signals through the third antenna port using the wireless circuitry. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. An electronic device, comprising:
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radio-frequency transceiver circuitry configured to handle wireless local area network signals, satellite navigation system signals, and cellular telephone signals; a first antenna; a second antenna that is coupled to the radio-frequency transceiver circuitry using a transmission line without adjustable antenna tuning components, wherein the first antenna is near-field coupled to the second antenna and serves as a tunable parasitic antenna resonating element for the second antenna, the first and second antennas being configured to concurrently handle the wireless local area network signals and the cellular telephone signals; and an adjustable capacitor coupled between the radio-frequency transceiver circuitry and the first antenna, wherein the adjustable capacitor is configured to tune the first antenna to cover at least one cellular telephone band of the cellular telephone signals and the adjustable capacitor is configured to adjust the tunable parasitic antenna resonating element to tune the second antenna. - View Dependent Claims (20, 21, 22)
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Specification