Coupler
Overview
Coupler for RF calibration and power control
Infineon bi-directional coupler is used as a part of power control and antenna tuning loops. Cellular RF front-ends incorporate bi-directional couplers in the main transmitted path to sense RF power propagating in a particular direction (transmitted or reflected back from the antenna). Based on the output of the coupler, dynamic PA control, and antenna tuning is performed.
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