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Park G.H.,Ace Technology Corporation | Park Y.B.,Ajou University
Journal of Electromagnetic Waves and Applications | Year: 2010

Capacitance of asymmetric conductor-backed coplanar waveguides (CPWs) is studied. An electrostatic boundary-value problem associated with the asymmetric conductor-backed CPWs is solved based on the Fourier transform, mode matching technique, and superposition. The formulation for the capacitance of the asymmetric conductor-backed CPWs is obtained in a series form. The computation is performed to show the behaviors of the capacitance in terms of the CPW geometry. © 2010 VSP.


Park Y.B.,Ajou University | Park G.H.,Ace Technology Corporation | Park H.H.,Samsung | Jung K.-Y.,Hanyang University
Microwave and Optical Technology Letters | Year: 2012

This letter examines the capacitance of coplanar waveguides (CPWs) in multilayer dielectric substrates.An electrostatic boundary-value problem of CPWs in multilayer dielectric substrates is solved based on the Fourier transform, mode matching technique, and superposition considering the conductor thickness. A series representation for the capacitance is presented. The capacitance is calculated in terms of the CPW geometry to illustrate its behaviors. © 2012 Wiley Periodicals, Inc.


Jung J.-H.,Yonsei University | Kim K.J.,Yonsei University | Yoon Y.J.,Yonsei University | Kim B.-N.,ACE Technology Corporation | Kim J.-Y.,ACE Technology Corporation
Proceedings of 6th European Conference on Antennas and Propagation, EuCAP 2012 | Year: 2012

In this paper, we present hexa-bands internal antenna (LTE (band-13&band-17)/GSM850/GSM900/DCS/PCS/UMTS-1) for Smart phone applications. Proposed antenna achieved wide band performance by electrically coupled feeding and a reactance loading on radiator pattern. An antenna has a small volume of about 2.5 cc with low profile (the height is 4.5 mm) and wide-band performance (low-band bandwidth is about 51 % at 931 MHz and high-band bandwidth is about 39% at 2085 MHz). © 2012 IEEE.


Kim K.-J.,Yonsei University | Lee S.,Yonsei University | Kim B.-N.,ACE Technology Corporation | Jung J.-H.,ACE Technology Corporation | Yoon Y.J.,Yonsei University
IEEE Antennas and Wireless Propagation Letters | Year: 2011

A small antenna with coupling feed and parasitic elements for multiband application is proposed. The proposed antenna is small, low-profile, and suitable for multiband mobile applications. The coupling feed structure provides wideband characteristic to a planar inverted-F antenna (PIFA). There are two resonance modes at 0.8 GHz, and their current distributions are observed. Four resonance modes from high-order resonance modes and parasitic elements are designed to be at 1.7 GHz. The proposed antenna is able to support the GSM850/GSM900/DCS/PCS frequency band in 3:1 VSWR standard. The radiation efficiency and radiation patterns are presented to verify compatibility in mobile handset applications. © 2006 IEEE.


Kim B.-N.,Korea Advanced Institute of Science and Technology | Park S.-O.,Korea Advanced Institute of Science and Technology | Oh J.-K.,ACE Technology Corporation | Koo G.-Y.,ACE Technology Corporation
IEEE Antennas and Wireless Propagation Letters | Year: 2010

A wideband built-in antenna with a new crossed C-shaped coupling feed structure for wireless terminals is presented. With the proposed design scheme, a 10-band built-in antenna that covers LTE700/GSM850/GSM900/DCS1800/PCS1900/ WCDMA/WiBro2350/Bluetooth/WiMAX2500/LTE2600 is experimentally tested. The antenna could be available for future 4G service and for current 2G/3G services. This novel 10-band built-in handset antenna is developed within the limits of a 50× 14× 6mm3 volume for recent smart phones or personal digital assistant (PDA) applications, thereby achieving good agreement between measurement and simulation. © 2006 IEEE.


Kim K.-J.,Yonsei University | Kim J.,Yonsei University | Yoon Y.J.,Yonsei University | Shin C.-M.,ACE Technology Corporation
2010 International Conference on Information and Communication Technology Convergence, ICTC 2010 | Year: 2010

An flexible antenna for UWB high-band sensor network is proposed by simulation and measurement. The proposed antenna is designed to be operated in UWB high-band, which provides advantages for emission power level limit. A Flexible circuit board is used to fabricate the proposed antenna for various sensor network environments. © 2010 IEEE.


Park Y.B.,Ajou University | Park G.H.,Ace Technology Corporation
Microwave and Optical Technology Letters | Year: 2011

In this letter, the capacitance of a conductor-backed coplanar waveguide (CPW) with an upper shielding is investigated.An electrostatic boundary-value problem of the conductor-backed CPW with an upper shielding is solved using the Fourier transform, mode matching technique, and superposition. The capacitance of the conductor-backed CPW is represented in a series and calculated in terms of the CPW geometry. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1364-1368, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26007 Copyright © 2011 Wiley Periodicals, Inc.


Shin C.-M.,ACE Technology Corporation
IB2COM 2011 - 6th International Conference on Broadband Communications and Biomedical Applications, Program | Year: 2011

It is proposed IR-UWB(impulse radio ultra wideband) tag and reader for RTLS(Real-Time Location System). Tag works as a transmitter and reader works as a receiver, the tag transmits impulse signal to readers periodically. Each reader checks time of arrival of impulse signal and send time information to location server for calculating position of tag. The tag and reader are tested for this system. © 2011 IEEE.

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