Array antenna apparatus

An array antenna apparatus, comprising:

• an even number of antenna elements, disposed on a linear line at regular intervals to be parallel to each other;
• a distributing unit that divides a transmitting signal into a number corresponding to the number of the antenna elements;
• and
• a phase shifter that executes a phase shift of the divided transmitting signals, the phase shift executed in such a way that allows a phase difference of π between the signals transmitted from adjacent antenna elements.

An array antenna apparatus, comprising:

• an even number of antenna elements, disposed on a linear line at regular intervals to be parallel to each other;
• a first phase shifter that executes a phase shift of received signals, the phase shift executed in such a way that allows a phase difference of π between the signals received by adjacent antenna elements;
• a combiner that combines the received signals, said received signals phase shifted in said first phase shifter in such a way that allows a phase difference of π between the signals received by adjacent antenna elements;
• a distributing unit that divides a transmitting signal into a number corresponding to the number of the antenna elements;
• and
• a second phase shifter that executes a phase shift of the divided transmitting signals, the phase shift executed in such a way that allows a phase difference of π between the signals transmitted from adjacent antenna elements.