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W-대역 도파관 전압조정발진기를 위한 건 다이오드 마운트의 실험적설계
민재용,리준문,안병철,노진입,김동환,Min Jae-Yong,Li junwen,Ahn Bierng-Chearl,Roh Jin-Eep,Kim Dong-Hwan 한국전자파학회 2005 한국전자파학회논문지 Vol.16 No.1
본 논문에서는 W-대역 도파관 전압조정발진기에 적용할 수 있는 건 다이오드 마운트를 실험적으로 설계하였다. 건 다이오드 마운트에 의해서 건 다이오드의 낮은 임피던스는 도파관의 높은 임피던스에 정합된다. 건 다이오드 마운트에서 디스크 직경, 디스크 높이, 금속봉 직경에 따른 전압조정 발진기의 중심 주파수, 주파수 조정범위, 출력전력 등 특성 변화 경향을 시뮬레이션에 의해 확인한 후 실험적인 방법으로 최적의 건 다이오드 마운트를 설계하였다. 설계된 전압조정 발진기는 중심 주파수 93.9 GHz, $2{\%}$ 주파수 선형성 범위 600 MHz, 출력전력 16 dBm 등의 우수한 특성을 보였다. In this paper, the Gunn diode mount is experimentally designed for use in a W-band waveguide voltage controlled oscillator(VCO). The role of the Gunn diode mount is to match the low impedance of the Gunn diode to the high impedance of waveguide. Computer simulations of VCO characteristics such as center frequency, frequency tuning range, and output power are carried out for various values of disc diameter, disc height, post diameter, and utilized in the experimental optimization of the Gunn diode mount. The designed VCO shows excellent characteristics; 93.9 GHz center fiequency, 600 MHz frequency tuning range with $2{\%}$ linearity, 16 dBm output power.
박철수(Cheol-Su Park),민재용(Jae-Yong Min),정명숙(Myung-Sook Jung),안병철(Bierng-Chearl Ahn) 한국정보기술학회 2016 한국정보기술학회논문지 Vol.14 No.3
This paper presents the design, fabrication and measurement of a lightweight W-band Cassegrain reflector antenna applicable to sub-munition sensors in precision artillery. A reflector antenna is optimally designed which consists of a dual-mode feedhorn, a subreflector and a main reflector. The main reflector and the subreflector-radome bodies are formed using injection molding technique and the reflecting surfaces are metalized using a PVD process. The dual-mode feedhorn is precisely machined out of an aluminum block. Measurements of the fabricated unit show that the proposed antenna has reflection coefficient of less than -16㏈ over 1.2% bandwidth, 38.6㏈i gain and 1.8° beamwidth at the center frequency.
신봉섭(Bong-Sup Shin),정용선(Yong-Sun Jeong),김호진(Ho-Jin Kim),민재용(Jae-Yong Min),자르갈사이칸 나이암바얄(Jargalsaikhan Nyambayar) 한국정보기술학회 2015 한국정보기술학회논문지 Vol.13 No.1
This paper presents a small power divider for conformal array antennas on artillery projectiles. The proposed power divider distributes the power supplied to a 50Ω coaxial cable to 50NΩ coaxial outputs placed on the circumference of a circular printed circuit board. The proposed power divider has a structure where the input cable is connected to each output cable with a quarter-wave stripline impedance transformer with a characteristic impedance of 50 √NΩ. A via hole is utilized to connect the coaxial cable with the stripline. Parallel plate waveguide modes are suppressed by using grounded via holes around the stripline. The proposed structure is applied to the design of 1:2, 1:3 and 1:4 power dividers. A 1:2 power divider is fabricated to verify the validity of the design. Measurements show that the fabricated power divider has a bandwidth of 117% at S-band and a transmission coefficient of -3.10dB and -3.28dB at the center frequency.
김호진(Ho-Jin Kim),임주영(Ju-Young Lim),신봉섭(Bong-Sup Sin),민재용(Jae-Yong Min),안병철(Bierng-Chearl Ahn) 한국정보기술학회 2014 한국정보기술학회논문지 Vol.12 No.10
This paper proposes a conformal fuze antenna for the transmission of S-band telemetry signals. The proposed antenna consists of rectangular patches conformal to the fuzes cylindrical metal surface and an associated feed circuit. Two patches are placed at 0° and 180° locations on the fuze surface and fed with powers of equal magnitude and 180° phase difference. Each patch is fed by a 100Ω microstrip line where the inset feed structure in employed for impedance matching with the 100Ω line. The antenna is realized on a 0.5mm thick substrate with an integrated feed network and a low-loss dielectric material with a thickness of 2.5mm is placed between the fuze surface and the substrate to increase the bandwidth. Measurements of the fabricated proposed antenna has a bandwidth 43MHz at S-band, a maximum gain of 3.7dBi, a dipole-like radiation pattern with nulls in the fuzes axial direction.