• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.12
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• pp.3608-3613
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• 2009

In this paper, we propose a mobile Radio Frequency Identification antenna for mobile hand set. The proposed antenna with directive radiation characteristics based on combination of electric-magnetic radiators can be installed in the mobile hand-set. The combination of PIFA antenna for electric radiator and loop antenna for magnetic radiator is presented and designed for료 m-RFID reader system. Target frequency band is 900-MHz band. and desired gain is 4dBi. The antenna is simulated using Ansoft HFSS software and shows expected results. The antenna is also manufactured using FR4-epoxy circuit board (h=1 mm, $\varepsilon_{\tau}=4.4$). There are good agreements between the simulated and measured VSWR curves and radiation characteristics.

• The Journal of the Korea institute of electronic communication sciences
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• v.5 no.6
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• pp.620-624
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• 2010

In this paper, design and manufactured UWB BPF. Manufactured UWB BPF can miniaturize the structure by controlling impedance and biographical one dimension that is allocated in transmission line each section. Proposed UWB BPF designed most suitable using Agilent company's ADS2008 Momentum and Ansoft company's HFSS 10. Manufactured UWB BPF has pass-band filter of 3.1 [GHz]~10.6 [GHz] and insertion loss is 0.39 [dB] in 8.3 [GHz], and reflection loss displayed special quality of 12.394 [dB] in 9.37 [GHz].

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.17 no.3 s.106
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• pp.280-286
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• 2006

Determination method of optimum feeding point for the PIFA type internal antenna for the mobile phone handset was studied. Fundamental theory is that radiated gain is basically depended upon the electric field strength between PIFA conductor and ground plane. Feeding point, slit configuration, material and structure of carrier are main factors fur the PIFA performances. It is shown that maximum electric field strengths of other feeding points decrease in -2dB to -10 dB than optimum point. Ansoft HFSS EM simulator was applied to determine the best feeding point for 2 models of Samsung Electronics mobile phone handset.

• The Journal of the Korea institute of electronic communication sciences
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• v.5 no.2
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• pp.119-124
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• 2010

In this paper, microstrip antenna for Digital TV from 406 to 806 MHz has been designed and fabricated. In order to broaden the bandwidth of the antenna and improve of frequency properties, slot size, radius for capacitance controls were changed. DTV antenna was designed using HFSS simulation program and fabricated by FR4 substrate of dielectric constant 4.4.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.3
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• pp.416-423
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• 2012

Using Ansoft HFSS(High Frequency Structure Simulator) and Serenade(circuit simulator), multilayer LPF and RF diode switch for GSM were designed. Diodes were transformed the inductor and capacitor in Tx and Rx for the simulation of equivalent circuit, respectively. In particular, the design of the simulation for multilayer RF diode switch was carried out with considering the variance of device and contraction percentage.

• Journal of the Korea Computer Industry Society
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• v.10 no.4
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• pp.121-126
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• 2009

In this paper, the patch antenna for 2.64GHz S-DMB applications has been studied. The patch antenna was designed by HFSS (High Frequency Structural Simulator) program and the optimized antenna was fabricated using photolithography method on the FR-4 substrate. To find optimal conditions of microstrip patch antenna, design parameters with different patch size, length of feedline and metal thickness were analyzed.

• Journal of the Korea Computer Industry Society
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• v.10 no.3
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• pp.67-72
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• 2009

In this paper, the microstrip patch antenna was designed by HFSS(High Frequency Structural Simulator). The characteristics of the microstrip patch antenna was analyzed. To find optimal conditions of microstrip patch antenna for 2.64GHz center frequency, the parameters with different patch size, width of slot, and length of slot were changed.

• Proceedings of the International Microelectronics And Packaging Society Conference
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• 2001.11a
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• pp.124-128
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• 2001

We apply for the first time a low cost and loss wafer level packaging technology for RF-MEMS device. The proposed structure was simulated by finite element method (FEM) tool (HFSS of Ansoft). S-parameter measured of the package shows the return loss (S11) of 20dB and the insertion loss (S21) of 0.05dB.

• Proceedings of the Korea Electromagnetic Engineering Society Conference
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• 2002.11a
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• pp.306-310
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• 2002

본 논문에서는 기존의 혼 안테나에 Dielectric rod를 삽입하는 구조를 사용하였다. 입력구조는 Rectangular Waveguide Feed에 Cone을 접목시키는 형태로 구현되었으며 기존의 E-Plane taper구조보다 특성이 양호하며 소형화를 구현해냈다. 제작된 안테나의 중심주파수는 37GHz이며 정재파비 특성 또한 양호하다. 여러 Feeding 구조 중 Bandwidth를 좀더 확장할 수 있는 구조에 초점을 맞추어 대역폭은 13%이상을 구현했으며 시뮬레이션 툴은 Ansoft HFSS V7.0으로 최적화한 후 제작 및 측정하였다. 또한 사용된 Dielectric rod의 제질은 Teflon(ETFE, $\varepsilon$$_{r}$=2.03)을 사용하였다.

• Proceedings of the IEEK Conference
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• 2002.06a
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• pp.431-434
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• 2002

In this paper, The resonant frequencies of any modes in the dielectric resonator filter is determined by numberical analysis. The theoretical analysis for the dielectric resonator filter used Ansoft HFSS. We designed the dielectric resonator filter with resonant frequency 4.5 GHz. We describe the characteristics of delivering Power to resonator in different shaped coupling loops. Tile resonant mode of T $E_{01{\delta}}$ and T $E_{01{\delta}}$ could be selected by the horizontal and the vertical coupling loop.p.