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;
delay lines with different numbers are provided between the trigger generator and each of the impulse generators; and
a time difference occurs between inputs to each of the antenna elements to thereby control a direction of a beam emitted from the electronic scanning array antenna.
1 Assignment
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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.
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Citations
10 Claims
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1. An electronic scanning array antenna comprising:
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a plurality of antenna elements constituting the electronic scanning array antenna are respectively connected to a single trigger generator through impulse generators; delay lines with different numbers are provided between the trigger generator and each of the impulse generators; and a time difference occurs between inputs to each of the antenna elements to thereby control a direction of a beam emitted from the electronic scanning array antenna. - View Dependent Claims (4, 5, 9)
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2. An electronic scanning array antenna comprising:
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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; delay lines with different numbers are provided between the trigger generator and each of the correlation detecting circuits or each of the sampling circuits; and a time difference occurs between inputs to each of the antenna elements to thereby control a direction of a beam received by the electronic scanning array antenna. - View Dependent Claims (10)
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3. An electronic scanning array antenna comprising:
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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; delay lines with different numbers are provided between the trigger generator and each of the impulse generators, and, at the same time, delay lines with different numbers are provided between the trigger generator and each of the correlation detecting circuits or each of the sampling circuits; a time difference occurs between inputs to each of the antenna elements to thereby control a direction of a beam emitted from the electronic scanning array antenna; and the time difference occurs between the inputs to each of the antenna elements to thereby control a direction of a beam received by the electronic scanning array antenna.
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6. An electronic scanning array antenna, wherein:
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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; delay lines with different numbers are provided between the pulse position modulator and each of the impulse generators; and a time difference occurs between inputs to each of the antenna elements to thereby control a direction of a beam emitted from the electronic scanning array antenna.
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7. An electronic scanning array antenna wherein:
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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 signal pulse position modulator receiving an input of a clock pulse from a clock generator; delay lines with different numbers are provided between the pulse position modulator and each of the correlation detecting circuits or each of the sampling circuits; and a time difference occurs between inputs to each of the antenna elements to thereby control a direction of a beam received by the electronic scanning array antenna. - View Dependent Claims (8)
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Specification