MULTI-BAND DEVICE WITH REDUCED BAND LOADING
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Abstract
In an embodiment, an apparatus includes a first radio frequency (RF) signal path and a second RF signal path. The first RF signal path can provide a first RF signal when active and the second RF signal path can provide a second RF signal when active. The second RF signal path can include a matching network with a load impedance configured to prevent a resonance in the second RF signal path due to coupling with the first RF signal path when the first RF signal path is active.
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Citations
21 Claims
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1. (canceled)
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2. A radio frequency system comprising:
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a first transmission path configured to provide a first radio frequency signal; and a second transmission path including a power amplifier configured to provide a second radio frequency signal, a matching network, and a switch coupled to an output of the power amplifier by way of the matching network, the switch having an input impedance configured to damp a standing wave resonance in the second transmission path due to coupling with the first transmission path when the first transmission path is active. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A radio frequency front end comprising:
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a first transmission path configured to provide a first radio frequency signal; and a second transmission path including a power amplifier configured to provide a second radio frequency signal and means for damping a resonance in a signal path of the second transmission path due to coupling with the first transmission path, the signal path being from the power amplifier to a multi-throw switch. - View Dependent Claims (16, 17, 18)
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19. A method of damping resonance due to coupling between radio frequency signal paths, the method comprising:
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amplifying a first radio frequency signal with a first radio frequency signal path; and damping, using an input impedance of a switch of a second radio frequency signal path, a resonance in the second radio frequency signal path due to coupling with the first radio frequency signal path during said amplifying, the switch being coupled to an amplifier of the second radio frequency signal path by way of a matching network of the second radio frequency signal path. - View Dependent Claims (20, 21)
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Specification