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방향탐지 정확도 개선을 위한 안테나 전면판 설계에 관한 연구
김인선,신임섭,Kim, In-Seon,Shin, Im-Seob 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.4
In this paper, we present the AFP(antenna front plate)s which were designed to reduce the reflection for the sake of the improvement of DF(direction finding) accuracy. The AFP consists of front plate, absorber and radome. The AFPs were optimized respectively by real test and we performed the DF test using our AFPs in laboratory. The DF test shows that the DF accuracy is about 2 times better than the requirement capability. Then, the DF field test was executed using the AFPs, which were installed in helicopter in consideration of the reflection by platform. The result of the DF field test is superior to the requirement capability also, which shows the validity of our design method.
산악지형에서의 UHF대역 전파손실예측을 위한 LEE모델 적용방안 연구
이창원,전용찬,신임섭,김진국,Lee, Changwon,Jeon, Yongchan,Shin, Imseob,Kim, Jin-Goog 한국군사과학기술학회 2015 한국군사과학기술학회지 Vol.18 No.2
In this paper, we have compared some radio propagation models in order to verify the performance of W.C.Y LEE propagation model in mountain area. The four propagation models, which are Okumura-Hata, ITU-R P.525, Egli and W.C.Y. LEE, are analyzed by comparing the differences between measured values and propagation loss estimation values. And a correction method for W.C.Y LEE model is suggested to improve the performance of W.C.Y. LEE model with measured data in mountain area. Simulation results show that the estimation error using W.C.Y LEE model is the lowest among four propagation models. Also, the results show that the corrected W.C.Y LEE model with suggested method improves the performance of propagation loss estimation.