| 摘要 |
PCT No. PCT/JP88/00131 Sec. 371 Date Oct. 12, 1988 Sec. 102(e) Date Oct. 12, 1988 PCT Filed Feb. 10, 1988 PCT Pub. No. WO88/06295 PCT Pub. Date Aug. 25, 1988.In a holographic radar having receivers (10) for amplifying, detecting, and A/D-converting the RF signals in all range bins received by antenna elements (1) and a digital beamformer (11) for performing digital operations on the outputs of these receivers to generate a number of beams equal to the number of antenna elements, three or four antenna arrays (D0 to D3), each array (2) being formed of a plurality of antenna elements (1), are oriented in different directions to provide 360 DEG coverage and switches (12) are provided to switch the connection between the antenna elements (1) and the receivers (10) according to pulse hit numbers and range bin numbers. Thus high-speed 360 DEG scan coverage can be attained with a small, inexpensive apparatus requiring as many receivers, memory elements and a digital beam former as needed for a single antenna array. The number of receivers can be further reduced by assigning one receiver per group of K array elements, providing memory elements, in number corresponding to the number of antenna elements, and operating further switches in synchronization with the transmit pulses and storing the video signals in the respective memory elements.
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