Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Development of Low-Power Electronic Scanner for 17GHz Band

17GHz 대역의 저출력 Electronic Scanner 개발

  • Received : 2018.12.12
  • Accepted : 2019.02.11
  • Published : 2019.04.30
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Abstract

Today, most detection systems used in the marine industry are the majority of devices operating in the high-power X-band bands. While most detection systems using these frequencies in the X-Band band can expect a wide range of detection performance, they are not suitable for precision detection and have the limitation that they are large and heavy. In this paper, we designed, fabricated and tested an electronic scanner capable of detecting not only the surrounding objects but also the ocean waves at a low power of less than 2W in the 17GHz frequency band of the Ku-Band. A high-performance patch array antenna and Doppler effect were utilized to obtain sufficient detection performance even at low power. As a result of the test, it was confirmed that the performance was sufficiently valuable.

오늘날 해양 업계에서 활용되는 대부분의 탐지 시스템은 고출력의 X-Band 대역을 활용한 장비들이 대다수이다. 이러한 X-Band 대역의 주파수를 활용하는 대부분의 탐지 시스템들은 광범위한 탐지 성능 이득을 기대할 수 있지만, 장비의 특성상 크고 무거우며 정밀한 탐지를 요하는 분야에서는 적합하지 않다는 한계점을 지닌다. 본 논문에서는 Ku-Band 대역 중 17GHz 주파수 대역에서 2W 미만의 저출력으로 주변의 물표뿐만 아니라 바다의 파랑까지 탐지가 가능한 Electronic Scanner를 설계 및 제작하고, 시험을 진행하였다. 저전력에서도 충분한 탐지성능을 확보하기 위하여 고성능의 패치 어레이 안테나 및 도플러 효과를 활용하여 충분한 탐지 성능을 확보하였으며, 이에 대한 시험 결과 충분한 가능성을 확인할 수 있었다.

Keywords

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Fig. 1 Sea Backscatter Coefficient (dBm2/m2)

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Fig. 2 Interleaved Pulse Schedule Image

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Fig. 3 RF Board Process

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Fig. 4 Transceiver PCB

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Fig. 5 Pattern @ 17.55 GHz

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Fig. 6 ST5918S3008-L2

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Fig. 7 Interconnections for Prototype System

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Fig. 8 Prototype Picture

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Fig. 9 RF Board Picture

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Fig. 10 Timing Board Schematic

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Fig. 11 Timing Board Picture

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Fig. 12 Doppler Image of Sphere @ 100m

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Fig. 13 Doppler Image of Waves (with Sailboat)

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Fig. 14 Comparison of Real Beach and Doppler Images

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Fig. 15 PPI Image

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Fig. 16 PPI Image with Clutter Removed

Table. 1 Nominal System Parameters

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Table. 2 Interleaved Pulse Schedule

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Table. 3 Retained Samples

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Table. 4 Antenna Specifications

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