Radio frequency jammer utilizing antenna array

A radio frequency (RF) jammer, comprising:

• a processing circuit having a multi-channel interface, the processing circuit being configured to generate an output signal having a frequency falling within an operating frequency band of a target device;
• a first RF frontend circuit, coupled to the multi-channel interface, the first RF frontend circuit being configured to receive the output signal to generate M RF signals, M being an integer greater than one, wherein the first RF frontend circuit comprises:
• a divider stage, arranged to split the output signal into M electrical signals;
• a phase shifting stage, coupled to the divider stage, the phase shifting stage being configured to perform phase shifting operation on the M electrical signals according to position information on the target device, and accordingly generate M phase shifted signals;
• and
• an amplifier stage, coupled to the phase shifting stage, the amplifier stage being configured to amplify the M phase shifted signals to generate the M RF signals;
• and
• an antenna array, coupled to the amplifier stage, the antenna array being arranged to receive the M RF signals to emit a beamforming signal directed to the target device.

A radio frequency (RF) jammer, comprising:

• a processing circuit having a multi-channel interface, the processing circuit being configured to generate M output signals according to an operating frequency band of a target device and position information on the target device, M being an integer greater than one, wherein the M output signals have a same frequency falling within the operating frequency band, and a phase relationship between the M output signals is determined according to the position information;
• M first RF frontend circuits, coupled to M channels of the multi-channel interface respectively, the M first RF frontend circuits being configured to receive the M output signals via the M channels to generate M RF signals, respectively;
• and
• an antenna array, coupled to the M first RF frontend circuits, the antenna array being arranged to receive the M RF signals to emit a beamforming signal directed to the target device.