Array antenna
First Claim
1. 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;
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
wherein a direction of a beam emitted from the electronic scanning array antenna is controlled by changing a transmission interval of the trigger generator.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is an electronic scanning array antenna which can be used as a UWB radar having an occupied band of not less than 500 MHz. An impulse generator is connected to each of a plurality of antenna elements constituting the electronic scanning array antenna, and a transmission trigger time to each of the impulse generators connected to the antenna elements is changed, whereby the phase of radio waves emitted from an antenna is equivalently changed. Moreover, a transmission trigger repletion interval is changed to thereby control a direction of a beam emitted from the array antenna. As means of changing a transmission trigger timing to each of the impulse generators connected to the antenna elements, a method of changing a frequency of a transmission trigger pulse and a method of changing a pulse position are adopted.
-
Citations
10 Claims
-
1. 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; 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 wherein a direction of a beam emitted from the electronic scanning array antenna is controlled by changing a transmission interval of the trigger generator. - View Dependent Claims (2, 3, 4)
-
-
5. 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. - View Dependent Claims (6)
-
-
7. 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.
-
-
8. 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.
-
-
9. 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. - View Dependent Claims (10)
-
Specification