| 摘要 |
A radio frequency (RF) communications device may include a power amplifier, an antenna, a tunable coupler between the power amplifier and the antenna, a processor, and an exciter module coupled between the processor and the power amplifier and generating an RF signal based upon a baseband signal. The processor may be configured to set the tunable coupler to a desired tuning and thereby defining a transfer function for the tunable coupler, and to generate an inverse transfer function of the transfer function of the tunable coupler. The processor may be configured to perform digital filtering upstream of the power amplifier based upon the inverse transfer function.
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