• 한국전자파학회:학술대회논문집
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• 한국전자파학회 2003년도 종합학술발표회 논문집 Vol.13 No.1
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• pp.446-449
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• 2003

In this paper, a design method for an inverted-F antenna printed on a dielectric ceramic material is presented. Antenna performances are optimized by adjusting metal strip patterns. Measurements of the fabricated antenna show good agreements with the numerical simulation.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 추계학술대회논문집
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• pp.138-140
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• 2003

In this paper, It is introduced to electromagnetic sound by AC motor and example of application by experiments. And Through adjusting some design parameter related to Mass, Damping coefficient and Stiffness of the system, we could find best design point to reduce motor total noise as well as noise component at AC power frequency (2f).

• 한국전자파학회논문지
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• 제10권5호
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• pp.680-687
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• 1999

An extensive study on miniaturized bandpass filter(BPF) appropriate for mobile communication systems is presented in this paper. The miniaturization has been accomplished by incorporating low-loss high-index materials inside a resonating cavity fabricated in silicon substrate using micromachining etching techniques. By use of materials with dielectric constant $\varepsilon_r$=500, filters with volume less than 0.11 $mm^3$ have been designed at the center frequency of 5.8 GHz with 3.3% bandwidth. The electrical performances and design tolerances of these filters for a variety of materials and shapes are discussed and design guidelines are presented herein.

• Journal of electromagnetic engineering and science
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• 제9권1호
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• pp.39-45
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• 2009

In this paper, we discuss hardware design and deployment issues in current passive UHF RFID systems. Using the link budget concept, the methodology to calculate forward- and reverse-link interrogation range is shown. Then, we consider hardware issues: phase diversity, phase noise with range correlation, and TX leakage problems. Finally, three interference problems when deploying RFID systems are presented.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 A
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• pp.64-66
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• 1997

The LHSM is the combined electromagnetic propulsion and levitation, braking and guidance system for Maglev. In this paper, the LHSM has the figure-of-eight shaped $3{\phi}$ armature windings, the field winding, and segmented secondary having transverse bar track. we treat of the development - design, analysis - of a combined electromagnetic propulsion/levitation systems, LHSM.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 B
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• pp.705-707
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• 2003

The design of multi-domain that considers all components of the electromagnetic systems such as air, iron, magnet, and coil is investigated using the topology optimization, interpolation method, and FEM. The design sensitivity equation for the topology optimization is derived using the adjoint variable method and the continuum approach. The proposed method is applied to the topology optimization of C-core actuator.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 B
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• pp.708-710
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• 2003

This paper presents design sensitivity analysis for the electromagnetic force and torque obtained from Coulomb's virtual work method using the adjoint variable method. And virtual displacement field is calculated from a static structural analysis. Derived equations are verified by comparison with finite different method. And topology optimization for a c-core is given as a verification example.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.878-879
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• 2007

This paper presents an optimum design of the electromagnetic pump with an tubular type linear induction motor(TLIM). For obtaining the maximum flow rate, the TLIM is optimized using genetic algorithm.

• International Journal of Safety
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• 제1권1호
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• pp.43-46
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• 2002

In this study, we adopt the strength variation (equation omitted) of electromagnetic waves by their distance. The location of antenna emitting electromagnetic waves is moved to its opposite side and the distance between human body and antenna is secured more. Therefore, the cellular phone designed in this study can reduce the impact of electromagnetic waves absorbed in local part of human body (in particular, head) and then can have competitiveness in the world market facing the regulations.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제55권5호
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• pp.245-249
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• 2006

This study tries to test and analyze the static friction torque generated by an electromagnetic clutch. Then the torque is improved by optimizing the shape of armature. For the purpose of design change and optimization of the electromagnetic clutch, the static friction torque prediction is very important. We construct an axi symmetric FEM model for analyzing the static friction torque and used a torque tester for evaluating the real torque. For a test, predicted static friction torque is compared with the experimental one to discuss the rationality of torque analysis process. The analytical result agrees well with experimental data, explaining the validity of the mathematical process and FEM model. After confirming the torque analysis process, the optimization process is investigated. The optimization result shows that the static torque is improved by changing the armature shape.