Patent ID: 9628044
Date: 2017-04-18
CPC Classifications: H02J,H03H

Claim:
1. A tunable antenna system comprising: an antenna; a processor electrically coupled to the antenna; a detector electrically coupled to the processor; and an antenna tuner electrically coupled between the antenna and the processor; a directional coupler electrically coupled between the antenna and the detector; wherein the processor is programmed to send one or more signals to the tuner to sweep the tuner through a plurality of tuner states, wherein the detector is coupled to determine a power of a signal received from the directional coupler in each respective tuner state, and wherein the processor is further programmed to send one or more signals to the tuner to set the tuner to a tuner state of the plurality of states using the determined powers, wherein the signal from the antenna is a reflected signal from the antenna, wherein the detector is electrically coupled between the antenna and the processor, wherein the directional coupler includes a plurality of paths including a first path that provides a path for a majority of the reflected signal and a second path that provides a path for the remainder of the signal, and wherein the detector is electrically coupled to the second path of the directional coupler.