Direction Finding Method of the Uniform Circular Array Antenna Using the Pattern of Phase Differences

원형배열 안테나의 위상차 패턴을 이용한 방향탐지 기법

Lim, Joong-Soo

  • Received : 2018.10.17
  • Accepted : 2018.01.20
  • Published : 2019.01.28


In this paper, we have studied a direction finding method of the radio signal by comparing the phase difference and its pattern from the uniform circular array antenna. In the phase comparison direction finding, if the length of the antenna baseline is longer than 0.5 wavelength of the incident signal, azimuth ambiguity occurs in which two or more azimuth angles are calculated in the same phase difference. The azimuthal ambiguity is removed by fusing the phase difference of the 5 antennas. The developed ambiguity elimination technology reduces the azimuth error where the antenna baseline is shorter than 1.236 wavelength in the uniform circular array with five antennas. This algorithm is very useful for the design of direction finder of an electronic information system.


interferometer;direction finding;antenna;convergence;ambiguity


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Supported by : Baekseok University