Wireless communication apparatus

A wireless communication apparatus comprising:

• a signal terminal configured to receive a transmitting signal;
• N antenna elements, where N is an integer greater than or equal to two;
• a first variable amplifier including a first input terminal coupled to the signal terminal, and a first output terminal;
• and
• N second variable amplifiers including N second input terminals, and N second output terminals coupled to the N antenna elements, respectively, wherein
• all of the N second input terminals are coupled in common to the first output terminal,
• the first variable amplifier is configured to amplify the transmitting signal received from the signal terminal via the first input terminal with a gain which is weighted and adjustable according to a first weight, and output the amplified transmitting signal via the first output terminal, and
• the N second variable amplifiers are configured to amplify the amplified transmitting signal received from the first output terminal via the N second input terminals with gains which are weighted and adjustable according to N second weights, and output amplified transmitting signals respectively amplified by the N second variable amplifiers, to the N antenna elements via the N second output terminals, respectively.