Mobile phone with increased transmitter efficiency employing two transmit antennas
AssigneeKoninklijke Philips Electronics N.V.
InventorVladimir A. Dvorkin
Life of this patent
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Abstract
A transmission portion of a front end for a portable communication device, in accordance with the present invention, includes a first transmission antenna coupled to a first output of a branching device for transmitting signals having a power below a threshold value. A power amplifier is coupled to a second output of the branching device. The power amplifier provides amplification to signals to be transmitted. A second transmission antenna is connected to an output of the power amplifier such that the power amplifier is switched off for transmission signals having a power below the threshold value and switched on to amplify transmission signals above the threshold value.
Claims24
A portable communication device having a transmission portion on a front end of said portable communication device, comprising:
- a first transmission antenna coupled to a first output of a branching device for transmitting signals having a power below a threshold value;
- a power amplifier coupled to a second output of the branching device, the power amplifier for providing amplification to signals to be transmitted;
- and
- a second transmission antenna connected to an output of the power amplifier such that the power amplifier is switched off for transmission signals having a power below the threshold value and switched on to amplify transmission signals above the threshold value.
A portable communication device having a front end comprising:
- a transmission portion including
- a first transmission antenna coupled to a first output of a branching device for transmitting signals having a power below a threshold value,
- a power amplifier coupled to a second output of the branching device, the power amplifier for providing amplification to signals to be transmitted, and
- a second transmission antenna connected to an output of the power amplifier such that the power amplifier is switched off for transmission signals having a power below the threshold value and switched on to amplify transmission signals above the threshold value;
- a receiver portion including a receiver antenna coupled to a receive mixer for receiving signals for the front end;
- and
- a local oscillator for providing signals to down convert the received signals and up convert the transmission signals for the front end.
Dependencies are inferred from the claim text.