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안길호 ( Gil Ho Ahn ),배진규 ( Jin Gyu Bae ),정광 ( Kwang Jung ),왕영일 ( Young Il Wang ),정준용 ( Jun Yong Jung ),강순근 ( Soon Keun Kang ),권혁무 ( Hyuk Moo Kwon ) 한국동물위생학회 2013 韓國家畜衛生學會誌 Vol.36 No.1
Three serotypes (O+A+Asia1 type) of the foot-and-mouth disease (FMD) vaccine were injected into cloven-hoofed animals in Korea after the nationwide spread of FMD at the end of 2010. This study was conducted to investigate FMD antibody development after FMD vaccination, and to determine whether there was a significant correlation between the antibody titer of the sow and the antibody titer of the growing pigs. The antibody titer (percentage inhibition [PI] titer) of the sow (gilt) after FMD vaccination was maintained at a level higher than 50 (P<0.05) for 5 months. A higher PI titer for the 1-month-old growing pigs corresponded with greater inhibition of the PI titer of the vaccinated growing pigs (P<0.05). A negative correlation (P<0.05) between the PI titer of the 1-month-old growing pigs and the PI titer of 3-month-old growing pigs, 4-month-old growing pigs after FMD vaccination at 2 months, 3months was identified, with a coefficient of determination (R2) of 0.274. Thus the PI titer of the growing pigs was inhibited to a greater degree when vaccination was performed at 2 months of age than at 3 months. However, many other factors likely influence growing pigs` PI titer in addition to the PI titer of the sow and age at vaccination, given that the coefficient of determination was somewhat lower.
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전자전 다중 위협 재밍을 위한 멀티빔 송수신장치용 광대역 고출력 송수신모듈 개발
장경남(Kyeong-Nam Jang),조상왕(Sang-Wang Cho),김지덕(Ji-Deok Kim),고재헌(Jae-Heon Ko),전영일(Young-Il Jeon),강창현(Chang-Hyun Kang) 한국전자파학회 2021 한국전자파학회논문지 Vol.32 No.10
본 논문에서는 전자전 다중 위협 재밍을 위한 멀티빔 송수신장치에 소요되는 8채널의 고출력송수신모듈(TRM)에 대한 설계 및 제작 그리고 측정 결과를 소개하였다. 설계된 TRM은 2~6 GHz 대역 내에서 운용되는 전자전 다중 위협재밍을 위한 멀티빔 송수신장치내 다중빔송수신모듈의 다중재밍신호와 배열안테나모듈의 수신신호를 증폭하는 역할을 한다. TX Mode에서 연속파 기준 43 dBm 이상의 출력을 가지며, RX Mode에서는 이득 10 dB 이상, 잡음지수 5 dB 이하의 특성을 갖도록 설계하였다. 각 Mode별 입력 VSWR은 2:1 이하이며, 송신, 수신경로 격리도는 50 dBc 이상의 특성을 갖는다. 각 채널간의 진폭과 위상의 정합도는 각각 2 dB, 10° 이하이며, TTD(true time delay)와 Digital Attenuator를 사용하여 채널별 신호 세기와 위상의 보정기능을 갖도록 하였다. An eight-channel transmit/receive module (TRM) was designed for a wideband electronic warfare multiple threat jamming transceiver. In the system, the TRM amplifies a multijamming signal from a multibeam transceiver module and a small radio frequency (RF) signal from an antenna. In TX mode, it has an output power of more than 43 dBm for a continuous wave. In RX mode, it has a gain of more than 10 dB and noise figure of less than 5 dB. The voltage standing wave ratio is less than 2:1, and the TX and RX path isolation is 50 dBc or more. The RF signal amplitude and phase variation are less than 2 dB and 10°, respectively. True time delay and a digital attenuator are used to compensate for the signal amplitude and phase for each channel.
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