Method and apparatus for tuning antennas in a communication device

摘要

A system that incorporates teachings of the present disclosure may include, for example, a matching network for a communication device having first and second antennas, where the matching network includes a first variable component connectable and a detector. The first variable component can be connectable along a first path between the first antenna and a front end module of the communication device, where the first antenna is configured for transmit and receive operation. The detector can be connectable along a second path between the second antenna and the front end module of the communication device, where the detector obtains an RF voltage associated with the second path, where the second antenna is configured for a diversity receive operation, and where the first variable component is adjusted based on the detected RF voltage to tune the matching network. Additional embodiments are disclosed.

主权项

1. A mobile communication device, comprising:
an antenna; a matching circuit coupled with the antenna, the matching circuit including one or more variable reactance elements with variable reactance values; and a controller coupled with the matching circuit, wherein the controller obtains an RF voltage at an output of the matching circuit, wherein the controller determines derivative information associated with the RF voltage by calculating a finite difference of two sequential measurements associated with the variable reactance values, and wherein the controller tunes the matching circuit using the derivative information.