Systems and methods for object detection by radio frequency systems

A circuit, comprising:

• an antenna element configured to transmit and receive wireless signals;
• one or more transmission paths coupled to the antenna element, the one or more transmission paths are configured to
• process a reference signal of a selected polarization, and
• transmit the reference signal from an electronic device comprising the circuit using the selected polarization, the reference signal transmitted during a measurement gap of communicating the wireless signals, and
• one or more receiving paths coupled to the antenna element, the one or more receiving paths are configured to receive a reflection signal based on the reference signal using the selected polarization;
• wherein the circuit is configured to
• determine whether an object is in proximity to the electronic device based at least in part on a comparison between the reference signal and the reflection signal, and
• in response to the object being in proximity to the electronic device, decrease power output by the circuit.

A method, comprising:

• transmitting, via a communication circuitry, data over a first one or more frequency bands and a reference signal over a second one or more frequency bands outside the first one or more frequency bands;
• receiving, via the communication circuitry, a reflection signal based on a reflection of the reference signal off an object;
• comparing, via the communication circuitry, the reflection signal and the reference signal;
• determining, via the communication circuitry, whether the object is within a pre-defined proximity to an electronic device comprising the communication circuitry;
• in response to the object being within the pre-defined proximity, decreasing power output by the electronic device;
• and
• in response to the object not being within the pre-defined proximity, increasing power output by the electronic device.