A signal strength indicator circuit, configured to detect a power of an output signal outputted by a power amplifier, includes a voltage gain circuit, a current gain circuit, a multiplier, and a buffer stage. The voltage gain circuit provides a first gain to the output signal to generate a first value of an indicating voltage when a voltage of the output signal is not greater than a threshold, and provides a second gain to generate a second value of the indicating voltage when the voltage of the output signal is greater than the threshold. The first gain is greater than the second gain. The current gain circuit generates an indicating current according to an input signal corresponding to the output signal. The multiplier multiplies the indicating voltage and the indicating current to generate an indicating power. The buffer stage converts the indicating power to the indicating signal.

In accordance with some embodiments, an apparatus for privacy protection includes a housing arranged to hold a second device, a local communication device at least partially supported by the housing, and a controller, where the apparatus is associated with a radio frequency (RF) power detector. The RF power detector monitors energy emitted from one or more antennas of the second device in response to determining that the second device indicates that the second device has transitioned from a first mode of operation to a second mode of operation. The apparatus further establishes a communication channel between the apparatus and the second device, and obtains, through the communication channel, a communication status of the second device. The apparatus can then report compromise of the second device upon determining that a discrepancy between the communication status and the energy emission.

A testing method for determining radiation performance of a device under test (DUT) is disclosed. The testing method comprises the following steps. The DUT is arranged at a first orientation. A first effective isotropic radiated power (EIRP) and a first effective isotropic sensitivity (EIS) of the DUT are measured at the first orientation. The DUT is arranged at a second orientation different from the first orientation, and a second EIRP of the DUT is measured at the second orientation. A second EIS of the DUT is measured at the second orientation according to a correlation between the first EIRP, the first EIS and the second EIRP.

A method and an apparatus for fault mitigation in a base station are disclosed. According to an embodiment, a faulty antenna element in an antenna array is detected. The antenna array transmits a first beam covering a predetermined range of directions. A target direction in which radiation power dropped due to a fault of the detected faulty antenna element is determined. A second beam pointing to the determined target direction is generated.

The present invention provides a calibration method of a transmitter, wherein the transmitter includes a power amplifier, a transformer, an adjusting circuit and a coupling circuit, wherein the power amplifier receives an input signal to generate an amplified input signal, the transformer receives the amplified input signal to generate an output signal, the adjusting circuit adjusts phase and amplitude of a common mode signal of the amplified input signal to generate a first signal, and the coupling circuit generates a coupled signal to the output signal according to the first signal. In addition, the calibration method includes: controlling the adjusting circuit to have multiple combination; calculating a strength of a second harmonic of the output signal under each combination; and determining a specific condition according to the intensities of the second harmonics under the combinations.

A test control unit controls a mobile terminal such that a first period T1, T3, T5, and T7 in which power of a transmission signal is maintained constant, and a second period T2, T4, T6, and T8 in which the power of the transmission signal is changed stepwise are alternately and continuously repeated, and changes a maximum value of signal power that is receivable by a pseudo base station unit in each first period T1, T3, T5, and T7, according to a power range of the transmission signal to be changed in each second period T2, T4, T6, and T8. A minimum value of the signal power that is receivable by the pseudo base station unit is determined, according to a maximum value of the signal power that is receivable by the pseudo base station unit and a reception dynamic range of a mobile terminal testing apparatus.

Indicating to a receiver node in a network that the receiver node should begin tracking signal to noise ratio (SNR) of a received signal for a new power and rate (PAR) interval for data sent from a transmitter node. A method includes determining that a new PAR interval is beginning. The method further includes adding an identifier to a data block. The identifier corresponds to the new PAR interval. The method further includes sending the data block from the transmitter node to the receiver node, where the receiver node will use the identifier to determine that a new tracking interval of SNR should be performed for the data block and subsequent data blocks having the identifier.

A method and electronic device are provided for adjusting an output power of an RF signal to be output to an antenna, based on a proximity of an object and a shape (or configuration) of the electronic device. The electronic device may include a proximity sensor, an antenna corresponding to the proximity sensor, a power amplifier corresponding to the antenna, and a processor configured to control the power amplifier to output a first RF signal having a first output power to the antenna, identify the antenna corresponding to the proximity sensor, based on proximity of an object being detected by the proximity sensor, identify, using a power table configured for the antenna, a second output power corresponding to a shape of the electronic device and the proximity of the object being detected, wherein the second output power is different from the first output power, and control the power amplifier to output a second RF signal having the second output power, to the antenna.

An electronic device includes a network monitor configured to acquire network environment information related to a radio frequency (RF) transmission signal; a transceiver configured to generate an envelope signal of the RF transmission signal; a transmission (Tx) module including a power amplifier for receiving the RF transmission signal from the transceiver and amplifying the RF transmission signal; and an envelope tracking (ET) modulator configured to receive the envelope signal from the transceiver and to provide a bias of a power amplifier to correspond to the envelope signal, wherein the ET modulator determines a magnitude of the bias of the power amplifier based on the network environment information acquired by the network monitor.

A semiconductor apparatus includes an interconnect substrate which includes an antenna module region in which an antenna and a semiconductor integrated circuit electrically connected to the antenna are disposed, and at least one evaluation region situated next to the antenna module region and used to evaluate characteristics of the antenna, wherein the at least one evaluation region has at least one slit formed therein such that the slit includes at least a portion, situated opposite the antenna, of a boundary line that separates the antenna module region and the evaluation region from each other.