| 摘要 |
A direction finding array antenna simulator is provided to extend an application range by simulating a direction finding array antenna through a simple structure change. A direction finding array antenna simulator includes a first divider(111), a second divider(121), n variable phase shifters(122-1,122-n), n mixers(112-1,112-n), n low pass filters(113-1,113-n) and a phase difference detector(140). The first divider(111) divides an RF(Radio Frequency) signal into n signals. The second divider(121) divides a local oscillation signal into n signals. The n variable phase shifters(122-1,122-n) vary phases by being operated in a narrow band for the n divided oscillation signals. The n mixers(112-1,112-n) perform the frequency transform of the n divided RF signals based on the n phase varied oscillation signals. The n low pass filters(113-1,113-n) cut off the specific band for the n frequency-transformed signals. The phase difference detector(140) detects the phase difference of output signals of the low pass filters(113-1,113-n). The n variable phase shifters(122-1,122-n) are operated in a wide band by maintaining the phase difference of the local oscillation signal to the phase difference of an intermediate frequency, and simulate a phase array direction finding antenna of a linear shape, a circular shape or a planar shape.
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