| 摘要 |
An apparatus including a first antenna element operable at least one frequency within a first frequency range; a second antenna element operable at least one frequency within a second frequency range; radio frequency circuitry electrically connected to the first antenna element via a first electrical path and electrically connected to the second antenna element via a second electrical path, wherein the first and second electrical paths are common where they connect to the radio frequency circuitry; a first frequency-dependent filter arrangement, within the first electrical path, arranged to accept frequencies within the first frequency range and reject frequencies within the second frequency range; a first impedance level transformation arrangement, having a first tapped inductor, within the first electrical path; and a second frequency-dependent filter arrangement, within the second electrical path, arranged to accept frequencies within the second frequency range and reject frequencies within the first frequency range.
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