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- 저자 : 송병진 ( Byoung Jin Song ) (검색결과 3 건)
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고조파 제거 회로를 갖는 전력 증폭기 설계에 관한 연구
송병진,김재현,고민호,박효달,Song, Byoung-Jin,Kim, Jae-Hyun,Go, Min-Ho,Park, Hyo-Dal 한국전자파학회 2007 한국전자파학회논문지 Vol.18 No.7
본 논문에서는 마이크로스트립 구조의 고조파 제거 회로를 이용하여 900 MHz 1 W 전력 증폭기 설계에 관하여 연구하였다. 기존의 전력 증폭기들에는 고조파 제거를 위하여 여러 단의 집중 정수 소자를 이용한 필터를 사용함으로써 회로의 크기가 커지고, 사용되는 마이크로스트림 선로의 경우 주파수의 반복적인 특성만을 나타냄으로써, 비선형 회로들의 출력에 존재하는 모든 고조파 성분들을 제거하지 못하는 단점을 개선한 것이다. 설계된 전력 증폭기는 구동 증폭단, 전력 증폭단 그리고 고조파 제거단으로 각각 구성하였고, 에폭시 기판에 하이브리드 형식으로 구현하였다. 구현된 전력 증폭기는 고조파 제거 회로를 부가하지 않았을 경우와 비교해서 24 dBc의 2차 고조파, 30 dBc의 3차 고조파의 감쇄 특성을 보였으며, 전력 증폭기와 안테나 사이의 출력단 필터를 대신할 수 있을 것으로 판단된다. In this paper, I study on the realization of 900 MHz 1 W power amplifier using a harmonic rejection circuit. The proposed harmonic rejection circuit has improved the harmonic rejection characteristic and overcoming the problems related with frequency reproducibility on the microstrip line. The proposed power amplifier, fabricated by the type of hybrid with the epoxy PCB, was composed of driver stage and power amplifier stage with harmonic rejection circuit. The fabricated power amplifier shows -24 dBc and -30 dBc of harmonic rejection characteristic at 2nd and 3rd harmonic compared with that is not used, respectively and it could be replace the filter located between an output stage and an antenna.
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송병진 ( Song Byoung Jin ) 한국외국어대학교 법학연구소 2014 외법논집 Vol.38 No.4
The purpose of this study is to deal with the succession problem of North Korea-China Border Treaty and Maritime Boundary Agreement. Now, the existence of North Korea-China Border Treaty was identified inofficially. The national border treaty between the Democratic People’s Republic of Korea and the People’s Republic of China was written out according to the negotiation of practitioners on the basis of ‘Hoi Dam Gi Yo’ signed on October 3, 1962, and was the secret treaty composed of a preamble and five articles, and was not made public domestically and abroad, and was not registered on United Nations Secretariat. Based on North Korea-China Border Treaty concluded on October 12, 1962, North Korea-China Border Protocol was regulated by harmoniously completing the missions to investigate the national border between both countries on the spot, set up its signposts, and attribute islands and sand islands in the national border rivers, and by clarifying the national border between both countries, and by investigating its concrete locations. There is an opinion that it is rarely possible to renegotiate these agreements after the unification between South and North Korea in light of international law theories. However, there is a specific relationship between South and North Korea. That is, South and North Korea seem to be separate countries in the international society, whereas both maintain unitary state in the subjectivity of both parties. Such phenomenon is especially typical if both parties are simultaneously recognized by the third party. It follows from this situation that it is problematic whether North Korea whose stateness is not recognized by South Korea has its prestige as a treaty maker. About this problem, there is an opinion that, because North Korea has no treaty-making powers if North Korea’s stateness is rejected, the treaties concluded by North Korea are null and void, or an opinion that, because North Korea is in fact only a local regime which has no power to conclude the treaty representing entire Korea, the territorial treaties related to entire Korea are invalid, or an opinion that, because North Korea is also an international law subject, it follows that North Korea has treaty-making powers and all the treaties concluded by North Korea are effective. Therefore, the problem of succession is addressed on the premise that the treaties concluded by North Korea are valid. If they are null and void, such problem does not occur from the beginning. It follows that it is problematic whether, if they are effective, the general theories on state succession should or can be applied between South and North Korea. In the end, even though Article 11 of the Vienna Convention on Succession of States in Respect of Treaties has the prestige of international custom, the succession problem of national border in unified Korea can show its different succession formulas according to whether the unification formulas between South and North Korea are absorption, annexation, and merger or uniting of states. Also, in relation to maritime boundary agreements, based on domestic literature or the literature acquired from China, some argue that North Korea-China maritime boundaries were ascertained in North Korea-China Border Treaty. However, because North Korea-China Maritime Boundary Agreement has not yet been ascertained by North Korea or China officially, indirect arguments or inferences based on several circumstances are possible, but it is not yet reasonable to affirm its existence firmly, Even if North Korea-China Maritime Boundary Agreement has been already concluded, because exclusive economic zone and continental shelf can not be regarded as the concept identical with national borders in land, unified Korea may need to renegotiate with China. Of course, although some argue that Article 11 of the Vienna Convention should be also applied even to exclusive economic zone or continental shelf except territorial sea, because such argument is not generally approved in terms of academic theories or in the interpretative aspect of that article, it is persuasive to limit the scope of maritime boundaries to territorial sea. Moreover, according to case laws, in Guinea-Bissau vs. Senegal case, the arbitral tribunal awarded that the legal principle of state succession and the principle of ‘uti possidetis’ should be also applied to even maritime boundaries. However, it is unreasonable that this case is executed as a precedent. The International Court of Justice also decided that the realization of such principles did not include maritime boundaries. Furthermore, because territorial sea can not be identical with internal waters or lands in all the aspects, if the concept of territory stipulated by Article 12 is interpreted strictly, such scope of territory excludes territorial sea. In this case, unified Korea may need to renegotiate with China territorial sea as well as exclusive economic zone and continental shelf. In addition, in solving the succession problem of maritime boundaries, the practices to handle the succession problem of treaties concluded with other countries by the former Soviet Union remain as significant formulas.
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