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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal 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 13, Issue 4 - Dec 2013
Volume 13, Issue 3 - Sep 2013
Volume 13, Issue 2 - Jun 2013
Volume 13, Issue 1 - Mar 2013
Selecting the target year
Performance-Based EMC Design Using a Maximum Radiated Emissions Calculator
Hubing, Todd H. ;
Journal of electromagnetic engineering and science, volume 13, issue 4, 2013, Pages 199~207
DOI : 10.5515/JKIEES.2013.13.4.199
Meeting electromagnetic compatibility (EMC) requirements can be a significant challenge for engineers designing today's electronic devices. Traditional approaches rely heavily on EMC design rules. Unfortunately, these design rules aren't based on the specific EMC requirements for a particular device, and they don't usually take into account the specific function of the circuits or the many design details that will ultimately determine whether the device is compliant. This paper describes a design methodology that relates design decisions to the product's EMC requirements. The goal of performance-based EMC design is to ensure that electronic designs meet EMC requirements the first time the product is tested. More work needs to be done before this concept reaches its full potential, but electronic system designers can already derive significant benefit by applying this approach to products currently under development.
Design of a Tag Antenna for UHF RFID Food Systems
Shin, Dong-Beom ; Lee, Jung Nam ; Lee, Heyung-Sub ; Lee, Sang-Yeoun ; Kim, Byeong-Sam ;
Journal of electromagnetic engineering and science, volume 13, issue 4, 2013, Pages 208~213
DOI : 10.5515/JKIEES.2013.13.4.208
This paper proposes a tag antenna for radio frequency identification (RFID) food system. The RFID tag antenna is designed and fabricated based on the rectangular loop concept used in the UHF band (Korean and Japanese standards, 916.7-923.5MHz). The proposed tag antenna is composed of a radiation patch, sensor tag chip, temperature sensor, oscillator, and battery. We conjugated matching between the tag antenna and the sensor tag using a U-shaped stub. Details of the proposed tag antenna design and the simulated and measured results are presented and discussed.
Design for Triple Band Patch Array Antenna with High Detection Ability
Kim, In-Hwan ; Min, Kyeong-Sik ;
Journal of electromagnetic engineering and science, volume 13, issue 4, 2013, Pages 214~223
DOI : 10.5515/JKIEES.2013.13.4.214
This paper proposes a theoretical analysis of hidden device detection and a design of multiband circular polarization patch array antenna for non-linear junction detector system application. A good axial ratio of circular polarization patch antenna is realized by a new approach that employs inclined slots, two rectangular grooves and a truncated ground for the conventional antenna. A good axial ratio of the 1.5 dB lower is measured by having an asymmetric gap distance between the ground planes of the coplanar waveguide feeding structure. The common ground plane of the linear array has an optimum trapezoidal slot array to reduce the mutual coupling without increasing the distance between the radiators. The higher gain of about 1 dBi is realized by using the novel common ground structure. The measured return loss, gain, and axial ratio of the proposed single radiator, as well as the proposed array antennas, showed a good agreement with the simulated results.
Wide-Beam Circularly Polarized Crossed Scythe-Shaped Dipoles for Global Navigation Satellite Systems
Ta, Son Xuat ; Han, Jea Jin ; Park, Ikmo ; Ziolkowski, Richard W. ;
Journal of electromagnetic engineering and science, volume 13, issue 4, 2013, Pages 224~232
DOI : 10.5515/JKIEES.2013.13.4.224
This paper describes composite cavity-backed crossed scythe-shaped dipoles with wide-beam circularly polarized (CP) radiation for use in Global Navigation Satellite Systems. Each branch of the dipole arm contains a meander line, with the end shaped like a scythe to achieve a significant reduction in the size of the radiator. For dual-band operation, each dipole arm is divided into two branches of different lengths. The dipoles are crossed through a
phase delay line of a vacant-quarter printed ring to achieve CP radiation. The crossed dipoles are incorporated with a cavity-backed reflector to make the CP radiation unidirectional and to improve the CP radiation beamwidth. The proposed antennas have broad impedance matching and 3-dB axial ratio bandwidths, as well as right-hand CP radiation with a wide-beamwidth and high front-to-back ratio.
Estimation of Transferred Power from a Noise Source to an IC with Forwarded Power Characteristics
Pu, Bo ; Kim, Taeho ; Kim, SungJun ; Kim, Jong-Hyeon ; Kim, SoYoung ; Nah, Wansoo ;
Journal of electromagnetic engineering and science, volume 13, issue 4, 2013, Pages 233~239
DOI : 10.5515/JKIEES.2013.13.4.233
This paper proposes an accurate approach for predicting transferred power from a noise source to integrated circuits based on the characteristics of the power transfer network. A power delivery trace on a package and a printed circuit board are designed to transmit power from an external source to integrated circuits. The power is demonstrated between an injection terminal on the edge of the printed circuit board and integrated circuits, and the power transfer function of the power distribution network is derived. A two-tier calibration is applied to the test, and scattering parameters of the network are measured for the calculation of the power transfer function. After testing to obtain the indispensable parameters, the real received and tolerable power of the integrated circuits can be easily achieved. Our proposed estimation method is an enhancement of the existing the International Electrotechnical Commission standard for precise prediction of the electromagnetic immunity of integrated circuits.
An Improvement of Closed-Form Formula for Mutual Impedance Computation
Son, Trinh-Van ; Hwang, Keum Cheol ; Park, Joon-Young ; Kim, Seon-Joo ; Shin, Jae-Ho ;
Journal of electromagnetic engineering and science, volume 13, issue 4, 2013, Pages 240~244
DOI : 10.5515/JKIEES.2013.13.4.240
In this paper, we present an improvement of a closed-form formula for mutual impedance computation. Depending on the center-to-center spacing between two rectangular microstrip patch antennas, the mutual impedance formula is separated into two parts. The formula based on synthetic asymptote and variable separation is utilized for spacings of more than 0.5
. When the spacing is less than 0.5
, an approximate formula is proposed to improve the computation for closely spaced elements. Simulation results are compared to computational results of mutual impedances and mutual coupling coefficients as functions of normalized center-to-center spacing in both E- and H-plane coupling configurations. A good agreement between simulation and computation is achieved.
Tunable Bandpass Filter with Varactors Based on the CRLH-TL Metamaterial Structure
Kim, Beom Kyu ; Lee, Bomson ;
Journal of electromagnetic engineering and science, volume 13, issue 4, 2013, Pages 245~250
DOI : 10.5515/JKIEES.2013.13.4.245
This paper presents a tunable bandpass filter based on the varactor-loaded composite right- and left-handed transmission line (CRLH-TL). The proposed filter is composed of one CRLH-TL unit cell, which corresponds to the third-order bandpass filter. The tunable bandpass filter is designed using only lumped-elements. The use of lumped elements saves space and lowers the fabrication cost. The size of the proposed tunable bandpass filter is
, neglecting the feed lines and DC lines. All of the varactors are controlled by one DC bias. The center frequency of the bandpass filter can be controlled by varying the value of the varactors. The tunable range of the center frequency is from 412.5 to 670 MHz. The insertion loss is less than 3 dB, the return loss is more than 10 dB in the passband.
Parameter Selection Procedure of Parabolic Reflector Antenna for the Optimum Synthetic Aperture Radar Performances
Yoon, Seong Sik ; Lee, Jae Wook ; Lee, Taek Kyung ; Yi, Dong Woo ;
Journal of electromagnetic engineering and science, volume 13, issue 4, 2013, Pages 251~258
DOI : 10.5515/JKIEES.2013.13.4.251
A procedure for antenna parameter selections is proposed that considers the relationships between synthetic aperture radar performance and the antenna parameters of a parabola-type reflector antenna with a central flat dish. The effects of a central dish designed for weight reduction on the antenna beam pattern are also quantitatively analyzed using commercially available software based on the physical optics algorithm. The results of the theoretical analysis and simulation predict that a larger size of the central dish results in an increase in the sidelobe level, which is the reason for the increase in two important ambiguities, such as range ambiguity ratio (RAR) and azimuth ambiguity ratio (AAR). The dependence of RAR and AAR on Pulse repetition frequency is also analyzed and discussed.
Analysis of Wireless Power Transfer Using Metamaterial Slabs Made of Ring Resonators at 13.56MHz
Oh, TaekKyu ; Lee, Bomson ;
Journal of electromagnetic engineering and science, volume 13, issue 4, 2013, Pages 259~262
DOI : 10.5515/JKIEES.2013.13.4.259
This paper analyzes the effects of metamaterial slabs with negative permeability when applied to a two-loop wireless power transmission (WPT) system, both in theory and electromagnetic (EM) simulations. The analysis of magnetic flux focusing provided here assumes quasi-magnetostatics or magnetostatics. The slab structures with negative permeability have been realized using the periodically arrayed ring resonators (RRs) at 13.36MHz. Some examples with ideal lossless slabs of -1, -2, and -3 showed a great enhancement of WPT efficiencies when compared with the free space cases. However, practical lossy slabs made of planar copper RRs did not show significant enhancement of WPT efficiencies due to the relatively high losses in the ring resonator (or in the slab consisting of RRs) near the resonant frequency.
A Novel Compact Metamaterial Zeroth Order Resonant Bandpass Filter for a VHF Band and Its Stopband Improvement by Transmission Zeros
Kahng, Sungtek ; Jang, Geonho ;
Journal of electromagnetic engineering and science, volume 13, issue 4, 2013, Pages 263~266
DOI : 10.5515/JKIEES.2013.13.4.263
A novel compact and low-loss VHF bandpass filter is presented with enhanced stopband performance using metamaterial zeroth order resonator (ZOR) characteristics. An in-line ZOR filter is initially suggested and changed to have transmission zeros (TZs) due to source-load coupling for effective improvement of the isolation from UHF wireless channels. The proposed filter is smaller than 1/10 of the conventional filters in terms of size and has relatively very low insertion loss (< 1 dB for the electromagnetic (EM) simulation and < 3 dB for the measurement) and return loss (<-20 dB) in the passband due to the approximately 80% size reduction and the higher isolation in the stopband due to the TZs. The circuit and EM simulation are in good agreement with the measurements.