US 12,143,145 B2 · Duplexer measurement and tuning systems

Abstract

Systems and methods combine a test signal with a wanted (downlink or uplink) signal at an input of a duplexer of a communication device, and receive the test signal at an output of the duplexer. The test signal may include a radio frequency signal having less power than the wanted signal to avoid interference, or a digital signal that is added to or extracted from the wanted signal when the wanted signal does not have a radio frequency. A processor of the communication device causes the duplexer to operate in a tuning state (e.g., to transmit signals having a transmission frequency and receive signals having a receive frequency). The measurement system determines a difference or ratio in power between the test signal at the duplexer output and the duplexer input, and adjusts the tuning state based on the difference or ratio (e.g., to decrease or minimize the difference or ratio).

Claims20

Dependent claims

An electronic device, comprising:

a memory storing a tuning state;
an antenna configured to receive a downlink signal;
a receiver;
a transmitter configured to transmit an uplink signal;
a duplexer comprising a tunable component configurable based on the tuning state;
a combiner coupled to the transmitter and the duplexer;
a splitter coupled to the duplexer and the receiver;
and
a processor coupled to the combiner and the splitter, the processor configured to
combine a first signal with the uplink signal at the combiner to generate a first combined signal,
receive a second combined signal comprising a second signal and the downlink signal at the splitter, and
adjust the tuning state based on the first signal and the second signal.

9 more elements

Dependencies are inferred from the claim text.

Duplexer measurement and tuning systems

Life of this patent

Duplexer measurement and tuning systems

Life of this patent

Abstract

Claims20