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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Journal of Korean Institute of Electromagnetic Engineering and Science
Journal Basic Information
Journal DOI :
The Korean Institute of Electromagnetic Engineering and Science
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Volume & Issues
Volume 16, Issue 12 - Dec 2005
Volume 16, Issue 11 - Nov 2005
Volume 16, Issue 10 - Oct 2005
Volume 16, Issue 9 - Sep 2005
Volume 16, Issue 8 - Aug 2005
Volume 16, Issue 7 - Jul 2005
Volume 16, Issue 6 - Jun 2005
Volume 16, Issue 5 - May 2005
Volume 16, Issue 4 - Apr 2005
Volume 16, Issue 3 - Mar 2005
Volume 16, Issue 2 - Feb 2005
Volume 16, Issue 1 - Jan 2005
Selecting the target year
A Trapezoidal Ultra-Wideband Antenna Design
Lee Jung-Nam ; Lee Seong-Hun ; Park Jong-Kweon ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 16, issue 3, 2005, Pages 235~245
In this paper, a novel Ultra-Wideband(UWB) antenna fed by CPW is designed, fabricated, and measured for UWB communications. We have used the Microwave Studio of CST to simulate the proposed antenna. It is designed to work on a substrate TMM4 of thickness 0.762 mm and relative permittivity 4.5. The proposed antenna is satisfied with Ultra-Wideband communication band from 3.1 GHz to 11.5 GHz, for VSWR
2, and isolated IEEE 802.1la frequency band(5.15 GHz
5.825 GHz) using a rectangular slot. Measured group delay variation is less than 1 ns, thus indicating the proposed antenna a good candidate for UWB applications.
A RF Microstrip Balun Using a Wilkinson Divider and 3-dB Quadrature Couplers
Park Ung-Hee ; Lim Jong-Sik ; Kim Joung-Myoun ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 16, issue 3, 2005, Pages 246~252
A RF microstrip balun having low transmission loss for the balanced receiving dipole antenna is designed and fabricated using a three-section Wilkinson divider and two 3-dB quadrature couplers. It considers two types of the three-section Wilkinson dividers, the Cohn's optimum three-section structure and the miniaturized three-section structure, for wideband power splitting. Also, two 3-dB quadrature couplers for 180 degrees of phase difference adopt a twist-wire coaxial cable. The fabricated first balun having the Cohn's optimum three-section Wilkinson divider has 0.5 dB of transmission loss,
0.2 dB of amplitude imbalance, and 180
2.3 degrees of phase imbalance over 400 to 1000 MHz by measurement. The second one using the miniaturized three-section Wilkinson divider shows 1.0 dB of transmission loss,
0.7 dB of amplitude imbalance, and 180
8.8 degrees of phase imbalance over the same frequency band.
BST Thin Film Variable Capacitor with High Tunability on Silicon Wafer
Kim Ki-Byoung ; Yun Tae-Soon ; Lee Jong-Chul ; Kim Ran-Young ; Kim Hyun-Suk ; Kim Ho-Gi ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 16, issue 3, 2005, Pages 253~259
In this paper, BaSrTiO
(BST) thin film tunable interdigital capacitor using low cost silicon substrate instead of expensive single-crystalline substrate is presented. The tunable capacitor in which BST thin film is deposited by PLD has operation frequency and applied bias up to 4 GHz and 50 V, respectively. The maximum tunability in capacitance is found to be 30
, for an applied field of 5 kV/cm at a bias of 50 V. Therefore, it has been shown that the BST microwave tunable capacitor can be integrated onto Si substrate.
An Ultra Wideband Printed Monopole Antenna Using Modified Ground Plane
Kim Myoung-Bum ; Jung Jong-Ho ; Park Ikmo ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 16, issue 3, 2005, Pages 260~269
In this paper, we propose a microstrip line fed printed monopole antenna which has an ultra-wideband characteristic. Proposed antenna can improve the bandwidth characteristic with the taper structure formed by modified ground plane and radiating element. Measured impedance bandwidth ratio of the antenna is more than 30:1; from the lower frequency of 0.89 GHz to the upper frequency of more than 30 GHz for VSRW
2. The antenna has conical radiation pattern that has low radiation gain to
direction and higher radiation gains as
Analysis of UWB Interferences in a S-DMB Receiver
Park Tae-Heung ; Yang Hoon-Gee ; Park Seong-Gyoon ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 16, issue 3, 2005, Pages 270~276
This paper presents an analytical analysis about neighboring UWB interferences in a S-DMB receiver. We first derive the C/N
of a S-DMB receiver, based on its specifications and present the theoretical description of its effect to UWB interferences in terms of C/(N
+ I) and I/N
. Using the calculated C/(N
+ I) and I/N
, we derive the separation distance for a S-DMB receiver not to be interfered by UWB interferences. Finally, we propose an UWB emission limit at minimum separation distance under which a S-DMB is free of UWB interferences and compare it with the value appeared in FCC proposal.
The Occupied Bandwidth Measurement Technique for ATSC DTV Signal at Monitoring Station
Hwang Tae-Wook ; Kim Young-Soo ; Kim Seong-Il ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 16, issue 3, 2005, Pages 277~285
In this paper, we propose the occupied bandwidth(OBW) measurement method for effectively measuring the 99
OBW at monitoring station. In order to validate the measurement results obtained from the proposed measurement method, the modified adjacent channel power ratio(MACPR) is herein defined as the formula which was suitable for applying to the OBW measurement of 8-VSB DTV signals. It has been found that the MACPR is a good measurement parameter applicable for the proper site selection of monitoring station and the effective OBW measurement of 8-VSB DTV signals should be made for MACPR
35 dB with 600 measurement trials. The proposed measurement procedure is herein given and proven to effectively be applicable to the OBW measurement of terrestrial 8-VSB DTV signals on the air.
Bit Interleaved Coded Modulation for Noncoherent N-symbol Continuous Phase Frequency Shift Keying
Kim Chang-Joong ; Lee Ho-Kyoung ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 16, issue 3, 2005, Pages 286~292
We design and analyze the bit interleaved coded modulation(BICM) for noncoherent N-symbol continuous phase frequency shift keying(CPFSK) on the interleaved Rayleigh fading channel. In this paper, we use the equivalent normalized squared distance(ENSD) of noncoherent N-symbol CPFSK to design and analyze the BICM system. Specially, we design the BICM system for noncoherent 2-symbol 4-ary CPFSK, and analyze the performance of the system by using the ENSD. Simulation results are also provided to verify the theoretical performance analysis.
Development of a Program for Measurement, Analysis, and Simulation of Electromagnetic Environment for Automobile AV Receivers
Lee Ki-Seob ; Rhee Joong-Geun ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 16, issue 3, 2005, Pages 293~299
This paper introduces a program by which one can perform measurement, analysis, and simulation of electro-magnetic environment which affects on vehicular AV receivers. An integrated system of EM environment collected, GPS(Global Positioning System) informations, and developed simulation program can be an important evaluating tool for the analysis of automobile AV receivers.
A Compact 3-Layer EBG Structure with Square Ring Stripline
An Sung-Nam ; Shin Dong-Gu ; Kim Sang-ln ; Choo Ho-Sung ; Kim Moon-Il ; Park Ikmo ; Lim H. ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 16, issue 3, 2005, Pages 300~310
In this paper we propose the compact three-layer EBG structure. The unit cell of the proposed EBG structure is composed of a square patch in the upper layer and a square ring stripline in the lower layer that are connected to the ground plane through conducting vias. Reflection phase analysis method and tangential transmission method were considered to accomplish effective EM simulation and measurement. EM simulation results indicate that bandgap characteristics of the EBG structure using both methods is nearly identical. Parametric studies have been performed with the EM simulator to analyze the properties of the EBG structure by investigating the phase shift of the normally incident plane wave, and the transmission measurements between simple monopole antennas positioned near the EBGstructure have been done. The operating fiefuency bandgap of the proposed EBG structure is about 34
lower than the conventional EBG structure with the same size. Measured results show bandgap from 0.930 GHz to 0.945 GHz.
Diffraction Properties from Periodic Slot Array in the Upper Wall of Parallel Plate Waveguide
Park Jin-Taek ; Hong Jae-Pyo ; Ko Ji-Whan ; Cho Young-Ki ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 16, issue 3, 2005, Pages 311~318
Periodically perforated slot structure in the upper wall of the parallel plate waveguide is analyzed with main interest focusing on the diffraction Properties. The Periodic slot array is of infinite extent in one direction and of finite extent in the other direction. Various numerical results for reflection from the slotted section and transmission beyond the slotted section, and the radiation through the slotted section into the upper half space are presented with the height of feeding parallel plate waveguide, single slot size, and the periodicity between slots as parameters. This study is thought to be helpful to the design of the ventilation hole in the TFT-LCD and PDP.
A Design of OFDM Signal for Reducing the ICI Caused by Phase Noise
Li Yingshan ; Hieu Nguyen Thanh ; Ryu Heung-Gyoon ; Jeong Young-Hoo ; Hahm Young-Kown ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 16, issue 3, 2005, Pages 319~326
In the multi-carrier OFDM communication system for the high data rate transmission, the ICI caused by phase noise of transceiver local oscillator may degrade the system performance seriously. In this paper, a new ICI self-cancellation scheme using data-conjugate method is proposed to reduce the ICI caused by phase noise effectively. Then, the CPE, ICI and CIR are derived by the phase noise linear approximation method. Besides, to analyze the efficiency of system performance improvement, the proposed method is compared with the original OFDM and the conventional ICI self-cancellation scheme using data-conversion method. As results, the performance degradation caused by ICI can be mitigated effectively in the OFDM system with ICI self-cancellation scheme, and more performance improvement can be achieved by the proposed ICI self-cancellation scheme using data-conjugate method than the conventional ICI self-cancellation scheme using data-conversion method when phase noise exists.
A PAPR Reduction Method Using the Correlation of the OFDM Information Signal
Kim Sang-Woo ; Hieu Nguyen Thanh ; Ryu Heung-Gyoon ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 16, issue 3, 2005, Pages 327~334
In this paper, a new PAPR reduction method using correlation of input data sequence is proposed in order to overcome the serious drawbacks, such as necessity of side information transmission or increase of system complexity and calculation which are the basis of previous SLM, PTS and DSI method. A new PAPR reduction method can be classified into Method 1 and Method 2. Method 1 reduces the correlation between the smallest sub-sequence and neighbor smallest sub-sequence. And, to consider the own correlation in detail, the Method 2 reduces two case of correlation between neighbor smallest sub-sequences and neighbor largest sub-sequences. According to simulation result, Method 1 and Method 2 has about 0.5
O.8 dB and 1
l.2 dB PAPR reduction effect respectively. If more detailed process to reduce the correlation of input data sequence is considered, we can achieve better PAPR reduction performance.
Efficient Classification of ISAR Images Based on Polar Mapping Technique
Kim Kyung-Tae ; Park Jong-Il ; Shin Young-Nam ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 16, issue 3, 2005, Pages 335~343
In this paper, we propose a method to classify inverse synthetic aperture radar(ISAR) image from different target. The approach can provide efficient features for classification by the combined use of a polar mapping procedure and a well-designed classifier The resulting feature vectors are able to meet requirements that efficient features should have : invariance with respect to rotation and scale, small dimensionality, as well as highly discriminative information. Typical experimental examples of the proposed method are provided and discussed.