Array antenna

An electronic scanning array antenna comprising:

• a plurality of antenna elements constituting the electronic scanning array antenna are respectively connected to a single trigger generator through a correlation detecting circuit or a sampling circuit;
• a different number of delay lines are provided between the trigger generator and each of the correlation detecting circuits or each of the sampling circuits to cause a time difference to occur between inputs to each of the antenna elements;
• and
• wherein a direction of a beam received by the electronic scanning array antenna is controlled by changing a reception interval of the trigger generator.

An electronic scanning array antenna comprising:

• a plurality of antenna elements constituting the electronic scanning array antenna are respectively connected to a single trigger generator through impulse generators;
• the plurality of antenna elements are respectively connected to the trigger generator through a correlation detecting circuit or a sampling circuit;
• a different number of delay lines are provided between the trigger generator and each of the impulse generators to cause a time difference to occur between inputs to each of the antenna elements, and, at the same time, a different number of delay lines are provided between the trigger generator and each of the correlation detecting circuits or each of the sampling circuits to cause a time difference to occur between inputs to each of the antenna elements;
• wherein a direction of a transmission beam emitted from the electronic scanning array antenna is controlled by changing a transmission interval of the trigger generator;
• and
• wherein a direction of a reception beam received by the electronic scanning array antenna is controlled by changing a reception interval of the trigger generator.

An electronic scanning array antenna, wherein:

• an impulse generator is connected to each of a plurality of antenna elements constituting the electronic scanning array antenna;
• each of the impulse generators is connected to a single pulse position modulator receiving an input of a clock pulse from a clock generator;
• a different number of delay lines are provided between the pulse position modulator and each of the impulse generators to cause a time difference to occur between inputs to each of the antenna elements;
• and
• wherein a direction of a beam emitted from the electronic scanning array antenna is controlled by changing a transmission interval of the pulse position modulator.

An electronic scanning array antenna wherein:

• a correlation detecting circuit or a sampling circuit is connected to each of a plurality of antenna elements constituting the electronic scanning array antenna;
• each of the correlation detecting circuits or each of the sampling circuits is connected to a single pulse position modulator receiving an input of a clock pulse from a clock generator;
• a different number of delay lines are provided between the pulse position modulator and each of the correlation detecting circuits or each of the sampling circuits to cause a time difference to occur between inputs to each of the antenna elements;
• and
• wherein a direction of a beam received by the electronic scanning array antenna is controlled by changing a reception interval of the pulse position modulator.