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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 24, Issue 12 - Dec 2013
Volume 24, Issue 11 - Nov 2013
Volume 24, Issue 10 - Oct 2013
Volume 24, Issue 9 - Sep 2013
Volume 24, Issue 8 - Aug 2013
Volume 24, Issue 7 - Jul 2013
Volume 24, Issue 6 - Jun 2013
Volume 24, Issue 5 - May 2013
Volume 24, Issue 4 - Apr 2013
Volume 24, Issue 3 - Mar 2013
Volume 24, Issue 2 - Feb 2013
Volume 24, Issue 1 - Jan 2013
Selecting the target year
Near-Field Analysis of Vehicle LF Antennas for Estimating the Reading Range of a Smart Key
Kim, Heeyoung ; Byun, Gangil ; Seong, Jaeyong ; Jung, Hankil ; Choo, Hosung ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 24, issue 7, 2013, Pages 671~677
DOI : 10.5515/KJKIEES.2013.24.7.671
In this paper, we propose a method of near-field analysis for vehicle LF antennas in order to estimate the accurate reading range of a smart key. The LF antenna consists of a ferrite core and a conducting wire which is coated with polyethylene for insulation, and it is mounted at the rear bumper frame of a commercial vehicle. The reading range of a smart key is measured at nine azimuthal directions distributed around the rear bumper, and then, the received power at each maximum reading range is measured by using a spectrum analyzer. The measurement shows that the maximum reading range exists between 1.38 m and 1.53 m, and the radiated power is between -83.6 dBmW and -75.0 dBmW. We further conducted EM simulation to estimate the reading range and the received power under the same condition that we applied for the measurement. The results demonstrate that an accurate reading range and received power can be achieved by simulation.
Design of a Dual-Band GPS Array Antenna
Kim, Heeyoung ; Byun, Gangil ; Son, Seok Bo ; Choo, Hosung ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 24, issue 7, 2013, Pages 678~685
DOI : 10.5515/KJKIEES.2013.24.7.678
In this paper, we propose a design of dual-band patch antennas for Global Positioning System(GPS) applications, and the designed antenna is used as an individual element of GPS arrays. A low distortion and a high isolation of the array are achieved by adjusting rotating angles of each array element. The antenna consists of two radiating patches that operate in the GPS
bands, and the two ports feeding network with a hybrid chip coupler is adopted to achieve a broad circular polarization(CP) bandwidth. The rotating angles of each antenna element are varied with four directions(
) in order to minimize the pattern distortion and maximize the isolation among array elements. The measurement shows bore-sight gains of 0.3 dBic(
) and -1.0 dBic(
) for the center element. Bore-sight gains of 1.6 dBic(
) and 1.0 dBic(
) are observed for the edge element. This results demonstrate that the proposed antenna is suitable for GPS array applications.
Electrically Small Eighth-Mode Substrate-Integrated Waveguide(EMSIW) Antenna Loading Complementary Split Ring Resonator(CSRR)
Kang, Hyunseong ; Sam, Somarith ; Lim, Sungjoon ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 24, issue 7, 2013, Pages 686~693
DOI : 10.5515/KJKIEES.2013.24.7.686
Based on a substrate integrated waveguide(SIW) and a complementary split ring resonator(CSRR), electrically small antennas are proposed in this paper. Antenna's electrical size is reduced by introducing both CSRR and the eighth-mode substrate integrated waveguide(EMSIW). The EMSIW occupies only 12.5 % of the conventional SIW at the same dominant resonant frequency. In addition, the resonant frequency of the antenna is varied by rotating the CSRR on the EMSIW while keeping the same radiation patterns. The resonant frequency is changed from 4.74 GHz to 5.07 GHz by varying orientation of the CSRR from 0 to 360 degree. Unidirectional radiation patterns are observed and the measured peak gains are from 4.50 to 5.92 dBi.
Analysis of MIMO Channel Characteristics Considering the Building Density in the Urban Area at the 700 MHz Frequency Band
Jung, Myoung-Won ; Kim, Jong Ho ; Chong, Young Jun ; Pack, Jeong Ki ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 24, issue 7, 2013, Pages 694~700
DOI : 10.5515/KJKIEES.2013.24.7.694
Urban area is a representative environment of wireless channels in the mobile communication, building density has a different distribution depending on the location. Building density has affect to propagation prediction For this reason, building density is expected to affect to the channel characteristics, we need to analyze it. We measured channel characteristics in urban areas of Jeju island by channel sounder and
antenna. Channel characteristics considering the building density were derived based on the measured data in the urban area. In this paper, the measurement data is analyzed and channel characteristics are derived through MIMO Channel measurements at 700 MHz considering the building density in the urban area.
A Policy Direction for Promoting Wireless Industry by the Widespread Utilization of Radio Waves
Park, Seok-Ji ; Park, Duk-Kyu ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 24, issue 7, 2013, Pages 701~709
DOI : 10.5515/KJKIEES.2013.24.7.701
In this paper, we studied a policy direction for promoting wireless industry. For this, we defined the concept of wireless industry and classified their structure and suggested a growth model of wireless industry and policy elements, which is composed of technology development, service development, advancement of law and regulations, business model development, assistance of production and use, publicity enforcement for promotion. Also, we had a survey on the policy elements for promoting the industry by experts interview. We drew some policy directions for promotion of wireless industry from survey results.
Total Simulation for the Noise Prediction of Motor Driving System in EV/HEV System
Gwon, O-Hyun ; Lee, Jae Joong ; Kim, Kwang-Ho ; Ahn, Ji-Hyun ; Kweon, Hyuck-Su ; Kim, Mi-Ro ; Jung, Sang-Yong ; Nah, Wansoo ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 24, issue 7, 2013, Pages 710~721
DOI : 10.5515/KJKIEES.2013.24.7.710
The noise prediction of motor driving system is one of the most important parts in EV/HEV, as the number of power electronic devices increases. This paper describes the mechanism of noise making process and proposes a simulation model of motor driving system for the prediction of the conducted noise. Theoretical calculations and model based simulations were carried out. DOD-dependent-battery parameters were extracted by AC analysis, and an inverter model including dynamic diode was used. Furthermore, 2-D EM tool was used for the motor modeling and was combined with the circuit models of battery and inverter. The simulated voltages, currents and spectrums in the motor driving system showed qualitatively meaningful results, suggesting the validness of the suggested modeling methods.
Transmission Characteristics on Dimensional Tolerances of Millimeter-Wave Rectangular Waveguides
Park, Kyung-Sik ; Kim, Ki-Chai ; Kang, Jin-Seob ; Kim, Jeong-Hwan ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 24, issue 7, 2013, Pages 722~729
DOI : 10.5515/KJKIEES.2013.24.7.722
This paper presents the influence on the transmission characteristics of dimensional tolerances of rectangular waveguides usually used as a low-loss transmission line in the millimeter-wave band. We derived the Green's functions of the waveguide with eigenfunction expansion method. The reflection coefficient of the waveguide with a post is calculated by using internal impedance in order to investigate the influence of dimensional tolerances of the waveguide. In order to check the validity of the theoretical analysis, the calculated reflection coefficients are compared with the measured results.
Time-Domain Model of Surface Clutter for Airborne Phase-Array Radar
Kim, Tae-Hyung ; Kim, Eun-Hee ; Kim, Seon-Joo ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 24, issue 7, 2013, Pages 730~736
DOI : 10.5515/KJKIEES.2013.24.7.730
Time-domain clutter generation model for airborne pulse doppler phase-array radar is presented. Time-domain surface clutter signal is generated assuming earth of a sphere and considering geometry of a clutter patch, and generation of sub-array clutter signal is presented. The generated sub-array clutter signal can be used by simulation input signal in various radar applications of DBF(Digital Beamforming), ABF(Adaptive Beamforming), Stap(Space-Time Adaptive Processing) and etc.
Development of High-Speed Real-Time Signal Processing for 3D Surveillance Radar
Bae, Jun-Woo ; Kim, Bong-Jae ; Choi, Jae-Hung ; Jeong, Lae-Hyung ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 24, issue 7, 2013, Pages 737~747
DOI : 10.5515/KJKIEES.2013.24.7.737
A 3-D surveillance radar is a pulsed-doppler radar to provide various target information, such as range, doppler and angle by performing TWS. This paper introduces HW/SW architecture of radar signal processing board to process in real-time using high-speed multiple DSP(Digital Signal Processor) based on COTS. Moreover, we introduced a implemented algorithm consisted of clutter map creation/renewal, FIR(Finite Impulse Response) filter for rejection of zero velocity components, doppler filter, hybrid CFAR and finally presented computational burden of each algorithm by performing operational test using a beacon.
Study on Wideband Shielding Effects of Simple Building Structures Using FDTD Method
Cho, Jeahoon ; Ha, Sang-Gyu ; Park, Sungmin ; Chu, Kwanguk ; Ju, Saehoon ; Kim, Hyeongdong ; Jung, Kyung-Young ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 24, issue 7, 2013, Pages 748~751
DOI : 10.5515/KJKIEES.2013.24.7.748
We perform a wideband radiated pulse coupling analysis of simple building structures using the finite-deference time-domain(FDTD) method. Toward this purpose, the building structures composed of concrete and window materials are assumed and we numerically model the electrical properties of each material. In this work, we apply a dispersive FDTD algorithm for the electromagnetic analysis of building structures and investigate their shielding effectiveness in the frequency range of 50 MHz to 1 GHz.