Search Results - "Taek-Kyung Lee"

Suppression of harmonics in Wilkinson power divider using dual-band rejection by asymmetric DGS by WOO, Duk-Jae, LEE, Taek-Kyung

“…In this paper, we present an effective technique of second and third harmonic suppression for a Wilkinson power divider by using an asymmetric spiral defected…”
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Novel U-slot and V-slot DGSs for bandstop filter with improved Q factor by WOO, Duk-Jae, LEE, Taek-Kyung, LEE, Jae-Wook, PYO, Cheol-Sig, CHOI, Won-Kyu

“…Novel slot-shaped defected ground structures (DGSs) on the microstrip line are presented to provide a band-rejection property with an improved Q factor. Two…”
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Insensitivity Characteristics in the Dual Polarization of Deployable CFRP Reflector Antennas for SAR by Yoon, Seong Sik, Lee, Jae W., Lee, Taek-Kyung, Roh, Jin Ho

“…A large deployable reflector antenna is considered and designed for the application of a synthetic aperture radar system requiring high gain for the high…”
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Modified S-Band Satellite Antenna With Isoflux Pattern and Circularly Polarized Wide Beamwidth by Eun-cheol Choi, Lee, Jae W., Taek-Kyung Lee

“…A modified isoflux pattern antenna suitable for S-band satellite communication is introduced and investigated with respect to its beam pattern and axial…”
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Cross-Pol Pattern Effects of Parabolic Reflector Antennas on the Performance of Spaceborne Quad-Pol SAR Systems by Lim, Jung-Hwan, Lee, Jae Wook, Lee, Taek-Kyung

“…The ambiguity performance related to the image quality of a synthetic aperture radar (SAR) system can be categorized into range ambiguity, azimuth ambiguity,…”
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Analysis of Cross-Polarized Field by Panel Misalignment Errors in a Deployable Reflector Antenna by Lee, Si-A, Jo, Seung-Joo, Kim, Suk-Jin, Lee, Taek-Kyung, Lee, Jae Wook

“…This paper analyzes the generation mechanism of a cross-polarized field resulting from panel misalignment errors in a solid-surface deployable antenna…”
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Modeling stepped U-slot DGS microstrip line by Woo, Duk-Jae, Lee, Taek-Kyung, Nam, Sangwook

“…ABSTRACT This paper presents an equivalent circuit model for a stepped U‐slot defected ground structure (DGS). For a stepped U‐slot DGS, the defected structure…”
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A modeling method for dumbbell-shaped DGS and its parameter extraction by Woo, Duk-Jae, Lee, Taek-Kyung, Nam, Sangwook

“…ABSTRACT This article presents an equivalent circuit model for a dumbbell‐shaped defected ground structure (DGS) in a microstrip line. The effects of…”
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Performance Evaluation of a Modified SweepSAR Mode for Quad-Pol Application in SAR Systems by Lim, Jung-Hwan, Lee, Jae Wook, Lee, Taek-Kyung, Lee, Hyeon-Cheol, Lee, Sang-Gyu, Ryu, Sang-Burm, Yoon, Seong-Sik

“…Efficient earth observation using spaceborne synthetic aperture radar (SAR) requires the analysis of high-resolution wide-swath (HRWS) systems, which have a…”
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Optimal Design of the Reflector Antenna to Improve Performance of C-Band Quad-Pol ScanSAR Systems by Lim, Jung-Hwan, Lee, Jae Wook, Lee, Taek-Kyung, Ryu, Sang-Burm, Lee, Hyeon-Cheol, Lee, Sang-Gyu

“…The performance of synthetic aperture radar (SAR) antenna determines the quality of images obtained from the spaceborne SAR system, and thus, SAR antenna…”
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An Improved Sampling Frequency Offset Estimator for OFDM-Based Digital Radio Mondiale Systems by YOU, Young-Hwan, KIM, Sang-Tae, LEE, Kyung-Taek, SONG, Hyoung-Kyu

“…After coarse synchronization in orthogonal frequency division multiplexing (OFDM) systems, there might still be a residual frequency offset (RFO) and a…”
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Panel Misalignment Effects on the Radiation Pattern from a Solid Surface Deployable Antenna by Jo, Seung-Joo, Lee, Ji-Yong, Yoon, Seong-Sik, Lee, Taek-Kyung, Lee, Jae Wook

“…This paper presents an analysis of antenna performance degradation due to the panel misalignment in a solid surface deployable antenna. The misalignment of the…”
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Pilot-Aided Iterative Frequency Offset Estimation for Digital Video Broadcasting (DVB) Systems by Lee, Kyung-Taek, Seo, Jong-Soo

“…The main disadvantage of orthogonal frequency division multiplexing (OFDM) systems is its sensitivity to carrier frequency offset and timing offset. This paper…”
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Pilot-aided frequency offset tracking scheme for OFDM-based DVB-T by You, Young-Hwan, Lee, Kyung-Taek, Kang, Sung-Jin

“…The main disadvantage of orthogonal frequency division multiplexing (OFDM) systems is its sensitivity to carrier frequency offset and timing offset. This paper…”
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A Case Study on Iteratively Assessing and Enhancing Wearable User Interface Prototypes by Yoon, Hyoseok, Park, Se-Ho, Lee, Kyung-Taek, Park, Jung, Dey, Anind, Kim, SeungJun

“…Wearable devices are being explored and investigated as a promising computing platform as well as a source of personal big data for the post smartphone era. To…”
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An equivalent circuit model for a microstrip line with an asymmetric spiral-shaped defected ground structure by Woo, Duk-Jae, Lee, Taek-Kyung, Lee, Jae-Wook

“…ABSTRACT For a microstrip line with an asymmetric spiral‐shaped defected ground structure (DGS), an equivalent circuit model is presented. From the…”
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Accurate Pilot-Aided Sampling Frequency Offset Estimation Scheme for DRM Broadcasting Systems by YOU, Young-Hwan, LEE, Kyung-Taek

“…In this paper, we propose an improved sampling frequency offset (SFO) estimation scheme for orthogonal frequency division multiplexing (OFDM) based digital…”
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Detection method for digital radio mondiale plus in hybrid broadcasting mode by Kim, Seong-Jun, Park, Kyung-Won, Lee, Kyung-Taek, Choi, Hyung-Jin

“…In this paper, we propose a detection method for Digital Radio Mondiale (DRM) Plus suitable for hybrid mode broadcasting of both DRM Plus and analog FM…”
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Digital tuner implementation using FM tuner for DRM plus receivers by Kim, Seong-Jun, Park, Kyung-Won, Lee, Kyung-Taek, Choi, Hyung-Jin

“…The DRM Plus standard released in 2009 is a digital radio specification for radio frequency bands Band I and Band II. It is being considered in many countries…”
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Development of Portable T-DMB Receiver for Data Services by Lee, Kyung-Taek, Park, Yong-Suk, Park, Se-Ho, Paik, Jong-Ho, Seo, Jong-Soo

“…In December 2005, Korea launched terrestrial DMB (T-DMB) services for the first time in the world, making multimedia broadcasting services available in the…”
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