Radar apparatus and method for forming reception beam of the same
First Claim
1. A radar apparatus comprising:
- a plurality of antenna sub-modules which are separately arranged from each other at arbitrary positions within a preset range, and that function as individual active phased array antennas, and that also function, as a whole, as a single active phased array antenna;
a control device which forms a reception beam by exciting the plurality of antenna sub-modules and by individually and selectively applying directional control; and
a reception processor which obtains a beam combination signal by taking in a reception signal obtained by each of the plurality of antenna sub-modules to apply distributed aperture combination processing to the reception signal.
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Accused Products
Abstract
When an excitation signal is generated from an exciter due to an activation signal generated from a radar control device and is distributed to supply to each antenna sub-module, a combination reception signal is transmitted to a receiver from each antenna sub-module. The receiver takes in the combination reception signal obtained by each sub-module in response to an instruction from the radar control device, a frequency converter converts the combination reception signal into a prescribed frequency band, and a distributed aperture combination circuit performs a beam combination in accordance with a distributed aperture combination algorithm. In this way, a radar apparatus, which is equivalent to an active phased array radar of a large aperture and with high performance, is achieved.
44 Citations
6 Claims
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1. A radar apparatus comprising:
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a plurality of antenna sub-modules which are separately arranged from each other at arbitrary positions within a preset range, and that function as individual active phased array antennas, and that also function, as a whole, as a single active phased array antenna; a control device which forms a reception beam by exciting the plurality of antenna sub-modules and by individually and selectively applying directional control; and a reception processor which obtains a beam combination signal by taking in a reception signal obtained by each of the plurality of antenna sub-modules to apply distributed aperture combination processing to the reception signal. - View Dependent Claims (2, 3, 4, 5)
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6. A method for forming a reception beam of a radar apparatus, comprising:
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dividing an active phased array antenna that functions, as a whole, as a single active phased array antenna into a plurality of antenna sub-modules that function as individual active phased array antennas, and to install each divided module to be separately arranged from each other at an arbitrary position within a preset range; forming a reception beam by exciting the plurality of antenna sub-modules to individually and selectively apply direction control; and combining a beam combination signal by taking in a reception signal each obtained by the plurality of antenna sub-modules to apply distributed aperture combination processing.
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Specification