HANDHELD ELECTRONIC DEVICES WITH ISOLATED ANTENNAS
First Claim
1. Wireless communications circuitry in a handheld electronic device comprising:
- first and second wireless transceiver circuits that transmit and receive radio-frequency signals;
first and second transmission lines associated respectively with the first and second wireless transceiver circuits for conveying the radio frequency signals;
first and second antennas, wherein the first antenna is connected to the first transmission line and wherein the second antenna is connected to the second transmission line; and
an isolation element associated with the first antenna that resonates in a frequency band in which the second antenna operates and reduces interference between the first antenna and the second antenna during simultaneous antenna operation, wherein the first antenna comprises a planar antenna resonating element and wherein the isolation element is formed as a part of the planar antenna resonating element that is coplanar with the planar antenna resonating element.
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Abstract
Handheld electronic devices are provided that contain wireless communications circuitry having at least first and second antennas. An antenna isolation element reduces signal interference between the antennas, so that the antennas may be used in close proximity to each other. A planar ground element may be used as a ground by the first and second antennas. The first antenna may be formed using a hybrid planar-inverted-F and slot arrangement in which a planar resonating element is located above a rectangular slot in the planar ground element. The second antenna may be formed from an L-shaped strip. The planar resonating element of the first antenna may have first and second arms. The first arm may resonate at a common frequency with the second antenna and may serve as the isolation element. The second arm may resonate at approximately the same frequency as the slot portion of the hybrid antenna.
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Citations
9 Claims
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1. Wireless communications circuitry in a handheld electronic device comprising:
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first and second wireless transceiver circuits that transmit and receive radio-frequency signals; first and second transmission lines associated respectively with the first and second wireless transceiver circuits for conveying the radio frequency signals; first and second antennas, wherein the first antenna is connected to the first transmission line and wherein the second antenna is connected to the second transmission line; and an isolation element associated with the first antenna that resonates in a frequency band in which the second antenna operates and reduces interference between the first antenna and the second antenna during simultaneous antenna operation, wherein the first antenna comprises a planar antenna resonating element and wherein the isolation element is formed as a part of the planar antenna resonating element that is coplanar with the planar antenna resonating element. - View Dependent Claims (2, 3, 4)
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5. Wireless communications circuitry in a handheld electronic device comprising:
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first and second wireless transceiver circuits that transmit and receives radio-frequency signals; first and second antennas comprising respective first and second antenna resonating elements, wherein the first antenna and first wireless transceiver circuit operate in at least a first communications band and wherein the second antenna and second wireless transceiver circuit operate in at least a second communications band that is different than the first communications band; and an antenna isolation element associated with the first antenna resonating element, wherein the antenna isolation element and the second antenna are configured to resonate in the second communications band and wherein when the second wireless transceiver circuit transmits wireless radio-frequency signals through the second antenna, the antenna isolation element reduces signal interference between the first antenna and the second antenna, wherein the first antenna is configured to operate in a third communications band that is different from the first communications band and the second communications band. - View Dependent Claims (6, 7, 8, 9)
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Specification