| 摘要 |
A wireless communication unit (200) comprises a linearised transmitter (220) having a power amplifier (224) operably coupled to a feedback loop (240) for transmitting a linearised radio signal. An antenna port (202) is operably coupled to the linearised transmitter (220), for coupling to an antenna to radiate the radio signal. The wireless communication unit (200) includes an isolation device (242), operably coupled to the power amplifier (224) and located within the feedback loop thereby improving a linearity performance of the isolation device (242). A linearised transmitter integrated circuit is also described. <??>In this manner, by provision of the isolation device within the feedback loop, the isolation device's linearity is improved, thereby allowing inexpensive, substantially non-linear isolators to be used in the linearised transmitter circuit. <IMAGE>
|
