A method of testing vehicular radar includes acquiring binary phase codes of transmitters in a radar DUT; acquiring desired FOVs and desired angular resolutions of the transmitters to determine target angles of emulated targets; calculating far field phases of a PMCW signal for binary phase states of the transmit array at each of the target angles to determine resultant phase symbol streams; calculating excess roundtrip time delay for each emulation delay, between the DUT and the emulated targets, and each setup delay between the DUT and each emulator receiver; time-shifting the resultant phase symbol streams by the excess roundtrip time delays; subtracting the time-shifted resultant phase symbol streams from the resultant phase symbol streams to obtain difference phase symbol streams; modulating a PMCW signal transmitted by the DUT by the difference phase symbol streams; and emulating the echo signals at the target angles in response to the modulated PMCW signal.

Aspects of the present disclosure are directed to injection locking and related apparatuses. As may be implemented in accordance with one or more embodiments, an apparatus includes a plurality of injection-locking circuits configured to receive an injection signal, each injection-locking circuit including a mixer and a lock-detection circuit. In each of the injection-locking circuits, the lock-detection circuit detects a lock-status relationship between the injection signal and a signal output from the injection-locking circuit. In response to the lock-status relationship indicating an unlocked condition, a phase/magnitude of the injection signal is adjusted. In response to the lock-status relationship indicating a locked condition, transmission of an FM continuous wave (FMCW) chirp signal is facilitated.

Aspects of the present disclosure are directed to injection locking and related apparatuses. As may be implemented in accordance with one or more embodiments, an apparatus includes a plurality of injection-locking circuits configured to receive an injection signal, each injection-locking circuit including a mixer and a lock-detection circuit. In each of the injection-locking circuits, the lock-detection circuit detects a lock-status relationship between the injection signal and a signal output from the injection-locking circuit. In response to the lock-status relationship indicating an unlocked condition, a phase/magnitude of the injection signal is adjusted. In response to the lock-status relationship indicating a locked condition, transmission of an FM continuous wave (FMCW) chirp signal is facilitated.

A method for improving the accuracy of measuring a distance to an object using a wireless communication signal and an electronic device therefor the same are provided. The method includes transmitting a wireless communication signal to an external object by controlling a wireless communication module, receiving a signal returned based on the transmitted wireless communication signal being reflected from the external object by controlling the wireless communication module, acquiring a first distance to the external object based on a transmission time point of the transmitted signal and a reception time point of the received signal, acquiring a second distance to the external object based on phases of the transmitted signal and the received signal by controlling the phase matching module, and estimating a distance to the external object based on the first distance and the second distance.

A method for improving the accuracy of measuring a distance to an object using a wireless communication signal and an electronic device therefor the same are provided. The method includes transmitting a wireless communication signal to an external object by controlling a wireless communication module, receiving a signal returned based on the transmitted wireless communication signal being reflected from the external object by controlling the wireless communication module, acquiring a first distance to the external object based on a transmission time point of the transmitted signal and a reception time point of the received signal, acquiring a second distance to the external object based on phases of the transmitted signal and the received signal by controlling the phase matching module, and estimating a distance to the external object based on the first distance and the second distance.

A linear actuator includes a piston, a transmitter, and a receiver. The piston is configured to linearly extend and retract (such as within a cover tube). The transmitter is configured to generate a transmit electromagnetic waveform and direct the transmit electromagnetic waveform along a length of the piston. The receiver is configured to receive a return electromagnetic waveform that includes the transmit electromagnetic waveform after travelling to an extended end of the piston and returning to the receiver and determine a position of the piston based on a phase difference between the transmit electromagnetic waveform and the return electromagnetic waveform.

A linear actuator includes a piston, a transmitter, and a receiver. The piston is configured to linearly extend and retract (such as within a cover tube). The transmitter is configured to generate a transmit electromagnetic waveform and direct the transmit electromagnetic waveform along a length of the piston. The receiver is configured to receive a return electromagnetic waveform that includes the transmit electromagnetic waveform after travelling to an extended end of the piston and returning to the receiver and determine a position of the piston based on a phase difference between the transmit electromagnetic waveform and the return electromagnetic waveform.

A testing system includes: a bilinear polarized antenna for receiving and dividing a circularly polarized radio wave associating with a horizontal and a vertical polarization path of an object-to-be-tested into a first and a second high frequency signal; a phase retarder for delaying a phase of the first high frequency signal by 90 degrees to form a first high frequency signal with a phase delay of 90 degrees; a power splitter for receiving or synthesizing the first high frequency signal with the phase delay of 90 degrees and the second high frequency signal; and a high frequency signal transceiver for measuring power of the first high frequency signal with the phase delay of 90 degrees and the second high frequency signal and determining states of the horizontal and vertical polarization paths of the object-to-be-tested based on the power. Therefore, the testing system can speed up testing of the object-to-be-tested.

A testing system includes: a bilinear polarized antenna for receiving and dividing a circularly polarized radio wave associating with a horizontal and a vertical polarization path of an object-to-be-tested into a first and a second high frequency signal; a phase retarder for delaying a phase of the first high frequency signal by 90 degrees to form a first high frequency signal with a phase delay of 90 degrees; a power splitter for receiving or synthesizing the first high frequency signal with the phase delay of 90 degrees and the second high frequency signal; and a high frequency signal transceiver for measuring power of the first high frequency signal with the phase delay of 90 degrees and the second high frequency signal and determining states of the horizontal and vertical polarization paths of the object-to-be-tested based on the power. Therefore, the testing system can speed up testing of the object-to-be-tested.

A radar fill level measurement device can be provided, which comprises a frequency synthesizer configured to generate an oscillator signal, a high-frequency signal generation module configured to generate a transmission signal based on the oscillator signal, and an energy-supply module configured to supply electrical energy to the frequency synthesizer and the high-frequency signal generation module. Associated methods and computer-accessible medium can also be provided. The frequency synthesizer can comprise a control device, a reference oscillator and a phase-locked loop. The phase-locked loop can comprise a phase-locked device and an oscillator. The phase-locked loop can be configured to adjust a frequency of the oscillator signal to a target value, and the phase-locked device can be configured to provide a control signal for the control device when the frequency of the oscillator signal has reached the target value. The control device can also be configured to actuate the energy-supply module to supply the electrical energy to the high-frequency signal generation module before the control signal is provided by the phase-locked device.