http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Fabrication of Small Reference Probe and Its Application
Kang, No-Weon,Kang, Jin-Seob,Kim, Dae-Chan,Kim, Jeong-Hwan Institute of Electrical and Electronics Engineers 2007 IEEE transactions on instrumentation and measureme Vol.56 No.2
<P> This paper presents a disk-type small reference probe operating up to 1 GHz as an electric field transfer sensor. The probe is calibrated using a <TEX>$\mu$</TEX>-TEM cell and demonstrates a wide useable electric field strength range. Design and calibration methods are presented. The probe is suitable for testing and comparing the performances of reference field generation systems, both TEM cells and antennas. As an application, a technique for measuring the antenna gain is proposed and applied to open-ended waveguide antennas. </P>
Characterization Method of Electric Field Probe by Using Transfer Standard in GTEM Cell
No-Weon Kang,Jin-Seob Kang,Dae-Chan Kim,Jeong-Hwan Kim,Joo-Gwang Lee IEEE 2009 IEEE transactions on instrumentation and measureme Vol.58 No.4
<P>In this paper, we introduce a simple and wideband characterization method for electric field probes using a transfer standard. As a transfer standard, a thin disk-type reference probe that can operate from 50 to 1000 MHz is used and calibrated using a micro transverse electromagnetic (mu-TEM) cell. A gigahertz transverse electromagnetic (GTEM) cell is used to generate a reference electric field. It has been shown that the uncertainty of the proposed method can be increased due to the imperfection of the field condition in the cell. According to the measurement result, the proposed characterization method for the electric probes agrees within 6.3%, compared with the method that uses the TEM cell and standard antennas in a fully anechoic chamber.</P>
A Thermal Noise Measurement System for Noise Temperature Standards in <tex> $W$</tex>-Band
Tae-Weon Kang,Jeong-Hwan Kim,No-Weon Kang,Jin-Seob Kang Institute of Electrical and Electronics Engineers 2015 IEEE Transactions on Instrumentation and Measureme Vol. No.
<P>A W-band waveguide noise measurement system has been developed for noise temperature (NT) standards. The system consists of two standard noise sources and a waveguide radiometer. A horn-type cryogenic noise source operating at the liquid nitrogen temperature and an ambient temperature termination have been employed as standard noise sources. To measure noise power radiated from the noise sources including a device under test, a total-power waveguide radiometer has been constructed and its performance has been evaluated. Measured NT of a commercial waveguide noise source is presented with the measurement uncertainty of 0.10-0.13 dB (k = 2) in W-band.</P>
RF and Microwave Power Standards from 10 MHz to 40 GHz over Decades
Tae-Weon Kang,Jae-Yong Kwon,Jeong-Il Park,No-Weon Kang 한국전자파학회JEES 2018 Journal of Electromagnetic Engineering and Science Vol.18 No.2
Radio frequency (RF) and microwave power is one of the key quantities in the framework of electromagnetic measurement standards. Therefore, the stability of the power standard is essential to users’ reliable measurements in various areas. Coaxial and waveguide thermistor mounts are used as transfer standards of RF and microwave power. Over decades, the effective efficiencies of thermistor mounts have been measured using coaxial and waveguide microcalorimeters in the frequency range of 10 MHz–40 GHz. The measurement uncertainty of the effective efficiency is evaluated. Results show that the power standards have been well maintained within the measurement uncertainty.
Micro-TEM Cell을 사용한 표준 전자기장의 발생 및 측정불확도 평가
강진섭(Jin-Seob Kang),김정환(Jeong-Hwan Kim),강웅택(Ung-Taek Kang),강노원(No-Weon Kang),강태원(Tae-Weon Kang) 한국전자파학회 2009 한국전자파학회논문지 Vol.20 No.1
본 논문에서는 micro-TEM cell을 사용한 표준 전자기장 발생법을 기술하고 측정불확도를 평가하였다. 표준전자기장 발생 시스템은 auto-leveling 기능을 가진 신호발생부, 최대 1.2 ㎓까지 동작하는 micro-TEM cell, 서미스터 마운트를 사용한 전력측정부로 구성된다. 표준 전자기장 발생법의 타당성을 보이기 위해 10 ㎒~1 ㎓ 대역에서 전자기장의 세기 20 V/m에 대해 실시된 전자기장의 세기 국제비교(CCEM.RF-K20)의 참여 결과를 제시하였다. In this paper, a standard field generation method using a micro-TEM cell is described and its measurement uncertainty is evaluated. The standard field generation system consists of an auto-leveling signal source, a micro-TEM cell operating up to 1.2 ㎓, and a power measuring instrument using a thermistor mount. Measurement results of a field strength key comparison (CCEM.RF-K20) for the field strength of 20 V/m at frequencies between 10 ㎒ and 1 ㎓ are presented for validating the standard field generation method.
No, Jae Hong,Jo, Hoenil,Kim, Su-Hyeong,Park, In-Ae,Kang, Daehee,Lee, Chae Hyeong,Han, Seung-Su,Kim, Jae Weon,Park, Noh-Hyun,Kang, Soon-Beom,Song, Yong-Sang Wiley (Blackwell Publishing) 2009 Annals of the New York Academy of Sciences Vol.1171 No.1
<P>Matrix metalloproteinase-2 (MMP-2), MMP-9, and urokinase-type plasminogen activator (uPA) are important factors for cancer invasion and metastasis, degrading the extracellular matrix. They are also associated with angiogenesis. Angiogenic phenotype is another feature of high-grade cervical intraepithelial neoplasia (CIN). However, their associations with the progression of low-grade CIN to high-grade CIN are unexplored. We investigated whether these proteolytic enzyme expressions correlate with the progression of CIN. A total of 39 paraffin-embedded specimens from 10 patients with CIN grade 1, nine with CIN grade 2, and 20 with CIN grade 3 were assessed immunohistochemically by specific antibodies against MMP-2, MMP-9, and uPA. MMP-9 expression was higher in CIN 3 lesions (47.4%) than in CIN 1 (22.2%) and CIN 2 (20.2%) lesions, although the difference failed to reach statistical significance. The expression level of uPA and MMP-2 was not associated with the grade of CIN lesions. Interestingly, we found a significant association between expressions of uPA and MMP-2 (P= 0.028). Our results suggest that MMP-9 might play a role in the progression of CIN.</P>