| 摘要 |
An antenna for use in mobile electronic devices at more than one frequency. A circuit board contains a first antenna element at a first layer and a second antenna element at a second layer. The antenna elements have a common feed connection and ground connection. The antenna elements are arranged substantially parallel to each other on their respective layers in the circuit board. The first antenna element has a length that differs from that of the second antenna element to provide each with a different resonant frequency.
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