A system for dynamic antenna matching, comprising: an electronically tunable antenna matching circuit communicatively coupled between a transmitter and an antenna; a first directional coupler communicatively coupled between the antenna and the electronically tunable antenna matching circuit, the first directional coupler configured to receive a forward signal from the transmitter and a reflected signal from the antenna; a first gain and phase detector communicatively coupled to the first directional coupler, the first gain and phase detector configured to output a first magnitude measurement and a first phase measurement based on the forward signal and the reflected signal received at the first directional coupler; a second directional coupler communicatively coupled between the transmitter and the electronically tunable antenna matching circuit, the second directional coupler configured to receive the forward signal from the transmitter and the reflected signal from the electronically tunable antenna matching circuit; a second gain and phase detector communicatively coupled to the second directional coupler, the second gain and phase detector configured to output a second magnitude measurement based on the forward signal and the reflected signal received at the second directional coupler; and a controller communicatively coupled to the first gain and phase detector, the second gain and phase detector, and the electronically tunable antenna matching circuit, the controller configured to: determine a set of circuit parameters for the electronically tunable antenna matching circuit based on the first magnitude measurement and the first phase measurement; tune the electronically tunable antenna matching circuit based on the set of circuit parameters; and check for phase error after tuning the electronically tunable antenna matching circuit based on the second magnitude measurement; wherein the controller is further configured to retune the electronically tunable antenna matching circuit in response to a detected phase error. an electronically tunable antenna matching circuit communicatively coupled between a transmitter and an antenna; a first directional coupler communicatively coupled between the antenna and the electronically tunable antenna matching circuit, the first directional coupler configured to receive a forward signal from the transmitter and a reflected signal from the antenna; a first gain and phase detector communicatively coupled to the first directional coupler, the first gain and phase detector configured to output a first magnitude measurement and a first phase measurement based on the forward signal and the reflected signal received at the first directional coupler; a second directional coupler communicatively coupled between the transmitter and the electronically tunable antenna matching circuit, the second directional coupler configured to receive the forward signal from the transmitter and the reflected signal from the electronically tunable antenna matching circuit; a second gain and phase detector communicatively coupled to the second directional coupler, the second gain and phase detector configured to output a second magnitude measurement based on the forward signal and the reflected signal received at the second directional coupler; and a controller communicatively coupled to the first gain and phase detector, the second gain and phase detector, and the electronically tunable antenna matching circuit, the controller configured to: determine a set of circuit parameters for the electronically tunable antenna matching circuit based on the first magnitude measurement and the first phase measurement; tune the electronically tunable antenna matching circuit based on the set of circuit parameters; and check for phase error after tuning the electronically tunable antenna matching circuit based on the second magnitude measurement; wherein the controller is further configured to retune the electronically tunable antenna matching circuit in response to a detected phase error. determine a set of circuit parameters for the electronically tunable antenna matching circuit based on the first magnitude measurement and the first phase measurement; tune the electronically tunable antenna matching circuit based on the set of circuit parameters; and check for phase error after tuning the electronically tunable antenna matching circuit based on the second magnitude measurement; wherein the controller is further configured to retune the electronically tunable antenna matching circuit in response to a detected phase error.