Earticle

본 논문에서는 우주발사체의 표면에 장착되는 다양한 종류의 안테나 중 UHF-대역 안테나의 반사면 크기 변화에 따른 안테나의 주요 성능지표인 공진주파수, 반사손실, 이득 및 방사패턴 특성에 미치는 영향을 분석하였다. 반사면의 크기에 의한 영향을 파악하기 위해 충분한 크기의 반사면을 갖는 경우와 KSLV-I에 탑재된 안테나 반사면과 동일한 크기의 반사면을 가진 경우, 제작된 안테나의 형상에 의해 가질 수 있는 최소크기의 반사면을 가진 경우의 3가지 형태로 반사면 모델을 제시하고 각각의 모델에 대한 시뮬레이션 을 진행하여 안테나 성능에 미치는 영향을 확인하였다. 시뮬레이션 결과, 반사면의 크기가 변화하여도 공진주파수와 10dB 대역폭은 거의 변화하지 않는 것으로 확인되었다. 반사면의 크기변화에 따른 안테나 이득은 반사면의 크기가 감소됨에 따라 전반적인 이득과 3dB 대역폭은 감소되고, 방사패턴의 최대이득 방향이 안테나의 수직방향으로 변동되는 것으로 확인되었다. 방사패턴 특성은 전방방 향으로 각 반사면 모델이 거의 동일한 특성을 보였고 후방방향에서는 반사면의 크기가 작아짐에 따라 후방방사가 더욱 많이 발생되 어 방사패턴에 차이를 보였다.

This paper represents the impact analysis results of antenna reflector for the UHF-band antenna of Space Launch Vehicle. Three types of UHF-band antenna reflector model have been proposed and simulated to compare their characteristics such as resonance frequency, reflection loss and radiation pattern etc. Simulation results showed that resonance frequency and return loss of each reflector models were rarely affected even if reflector sizes are changed. The antenna gain and 3dB bandwidth were slightly changed to the worse directions as the reflector sizes are smaller.

The exponential advancement of artificial intelligence technology is deconstructing the functional foundations of modern conceptions of humanity—such as Homo Faber, Homo Ludens, and Homo Economicus—thereby raising fundamental questions about human identity. This paper argues that this deconstruction process paradoxically reveals three fundamental gaps that were overlooked by these traditional conceptions: embodiment, relationality, and self-consciousness. In response, this paper seeks an alternative in the Sasang Philosophy (四象哲學) of the 19th-century thinker Lee Je-ma to redefine a human identity suitable for the age of AI. Lee Je-ma's philosophy illuminates human identity through three dimensions. First, the concept of 'Taegeuk-maeum (太極心, the Supreme Ultimate Mind)' emphasizes that humans are recursive subjects who reflect upon their own thoughts and existential conditions. Second, the 'Sasangin (四象人, Four Constitutional Types)' typology posits humans as embodied affective beings, arguing that intellect and ethics are deeply rooted in the physical body. Third, the concept of 'Huiroaerak-jiseong (喜怒哀樂之性, the Nature of Joy, Anger, Sorrow, and Pleasure)' reveals humans as relational beings who empathize with and ethically respond to the suffering of others and social injustice. In conclusion, by organically integrating these three characteristics, this paper proposes the 'Embodied Empathic Reflector' as a new model for humanity in the age of AI. It asserts that human identity, which technology cannot replicate, lies not in functional efficiency but in the integrated experience of embodiment, empathy, and reflexivity. The purpose of this study is to provide a philosophical foundation for redefining human identity in the posthuman era.