Search Results - "Dal Ahn"

A Wideband Doherty Combiner with Phase Variation Compensation Using LTCC Applicable for High Power Transmission by Jang, Youna, Jeong, Kwanhun, Kim, Jiwon, Lee, Daeung, Ahn, Dal

“…In this paper, we propose a small-sized Doherty combiner with phase variation compensation using low temperature co-fired ceramic (LTCC) substrate. The…”
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Novel Wilkinson Power Divider with an Isolation Resistor on a Defected Ground Structure with Improved Isolation by Salman, Maaz, Jang, Youna, Lim, Jongsik, Ahn, Dal, Han, Sang-Min

“…A modified Wilkinson Power Divider is proposed in this paper that utilizes defected ground structure (DGS) in parallel with an isolation resistor. The proposed…”
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A New Doherty Combiner with Wide Bandwidth for Magnitude and Phase Balance Compensation by Jang, Youna, Seong, Cha Hye, Kang, Taehoon, Han, Sang-Min, Ahn, Dal

“…This paper proposes a novel Doherty combiner that uses a series and parallel resonant circuit for wideband. Unlike conventional combiners, the aim of the…”
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Design of a Wideband Balun Using IPD Technology for Compensating the Frequency Dependency by Jang, Youna, Jeong, Kwanhun, Lee, Yea-Ji, Kang, Taehoon, Lee, Sangmin, Koo, Seo, Ahn, Dal

“…In this paper, we propose a wideband balun using integrated passive device (IPD) technology. The proposed circuit is designed to compensate for the magnitude…”
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A design of the novel coupled-line bandpass filter using defected ground structure with wide stopband performance by Park, Jun-Seok, Yun, Jun-Sik, Ahn, Dal

“…In this paper, a novel three-pole coupled-line bandpass filter with a microstrip configuration is presented. Presented bandpass filters use defected ground…”
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Combustion performance test of a new fuel DME to adapt to a gas turbine for power generation by Lee, Min Chul, Seo, Seok Bin, Chung, Jae Hwa, Joo, Yong Jin, Ahn, Dal Hong

“…Recently, DME (dimethyl ether, CH3OCH3) has attracted a great deal of attention as an alternative fuel owing to its easy transportation and cleanliness. This…”
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Gas turbine combustion performance test of hydrogen and carbon monoxide synthetic gas by Lee, Min Chul, Seo, Seok Bin, Chung, Jae Hwa, Kim, Si Moon, Joo, Yong Jin, Ahn, Dal Hong

“…The development of coal IGCC (Integrated Gasification Combined Cycle) technology has made it possible to exploit electricity generated from coal at a low cost…”
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Two-stage equilibrium model applicable to the wide range of operating conditions in entrained-flow coal gasifiers by Nguyen, Thanh D.B., Lim, Young-Il, Song, Byung-Ho, Kim, Si-Moon, Joo, Yong-Jin, Ahn, Dal-Hong

“…A two-stage equilibrium model applicable to the wide range of operating conditions is developed to predict carbon conversion and composition of the product gas…”
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Design Considerations for Complicated Antenna Systems on a Simple De-Embedding Method by Han, Sang-Min, Lee, Seok-Jae, Kim, Kyungdong, Lim, Jongsik, Ahn, Dal

“…Design considerations are presented for antenna systems with complex front-end circuits. The actual characteristics of a radiating element should be considered…”
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Application of defected ground structure in reducing the size of amplifiers by LIM, Jong-Sik, PARK, Jun-Seok, LEE, Young-Taek, AHN, Dal, NAM, Sangwook

“…This letter presents a new technique to reduce the size of microwave amplifiers using a defected ground structure (DGS). The DGS on the ground plane of a…”
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A spiral-shaped defected ground structure for coplanar waveguide by LIM, Jong-Sik, KIM, Chul-Soo, LEE, Young-Taek, AHN, Dal, NAM, Sangwook

“…The authors present a spiral-shaped defected ground structure for coplanar waveguides (DGSCPW), which can be used as a kind of periodic structure for a planar…”
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Industrial gas turbine combustion performance test of DME to use as an alternative fuel for power generation by Lee, Min Chul, Seo, Seok Bin, Chung, Jae Hwa, Joo, Yong Jin, Ahn, Dal Hong

“…DME (dimethyl ether, CH 3OCH 3) is both a good alternative fuel for transportation and power generation and an LPG substitute owing to its cleanliness,…”
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Stabilization and Combustion Processes of Turbulent Premixed Lifted Methane−Air Flames on Low-Swirl Burners by Kang, Sungmo, Kim, Hoojoong, Lee, Jeongwon, Kim, Yongmo, Chung, Jae-Hwa, Ahn, Dal-Hong

“…This study has numerically modeled the stabilization and combustion processes of turbulent lifted methane−air premixed flames on low-swirl burners (LSB). In…”
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Analyzing Three Types of Design Methods for 5G N41 Band Acoustic Wave Filters by Jang, Youna, Ahn, Dal

“…This paper presents three design methods for acoustic wave (AW) filters: the direct conversion design method, the slope parameter method, and the band edge…”
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A compact-size microstrip spiral resonator and its application to microwave oscillator by Lee, Y-T, Lim, J-S, Kim, C-S, Ahn, D, Nam, S

“…This letter presents a compact size microstrip spiral resonator and its application to a low phase noise oscillator. This resonator has stopband…”
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Perforated Ground Plane Structures for RF and Wireless Components by Liu, Haiwen, Zhu, Lei, Ahn, Dal, Abbosh, Amin, Luo, Sha

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A power amplifier with efficiency improved using defected ground structure by LIM, Jong-Sik, KIM, Ho-Sup, PARK, Jun-Seok, DAL AHN, SANGWOOK NAM

“…The authors report the effects of defected ground structure (DGS) on the output power and efficiency of a class-A power amplifier. In order to evaluate the…”
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A novel 1-D periodic defected ground structure for planar circuits by KIM, C.-S, PARK, J.-S, AHN, D, LIM, J.-B

“…A new one-dimensional (1-D) defected ground unit lattice is proposed in order to improve the effective inductance. Increasing the effective inductance makes it…”
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A Defected Ground Structure without Ground Contact Problem and Application to Branch Line Couplers by Jeong, Yongchae, Ahn, Dal, Han, Sang-Min, Liu, Haiwen, Lim, Jongsik

“…A new defected ground structure (DGS) microstrip line that is free from the ground contact problem is described together with its application example. The…”
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Flexible Microwave Tag System Based on DGS Multiple Resonators by Lee, Seok-Jae, Lim, Jongsik, Ahn, Dal, Han, Sang-Min

“…A new flexible microwave tag system using a frequency-scanning type RFID is proposed with multiple resonators based on defected ground structures (DGSs). The…”
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