• Title, Summary, Keyword: Triple-band PIFA

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A Study on an Optimal Design of a Triple-band PIFA using the Evolution Strategy (진화 알고리즘을 이용한 삼중대역 PIFA 최적 설계에 관한 연구)

  • Ko, Jae-Hyeong;Kim, Koon-Tae;Kim, Kyong-Ah;Kim, Hyeong-Seok
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.4
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    • pp.768-773
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    • 2010
  • In this paper, we study on an optimal design of a triple-band PIFA (Planar Inverted-F Antenna) of 433 MHz, 912 MHz and 2.45 GHz by using evolution strategy. Generally, the resonant frequency of the PIFA is determined by the width and length of a U-type slot used. However the resonant frequencies of the multiple U slots are varied by the mutual effect of the slots. Thus the optimal width and length of U-type slots are determined by using an optimal design program based on the evolution strategy. To achieve this, an interface program between a commercial EM analysis tool and the optimal design program is constructed for implementing the evolution strategy technique that seeks a global optimum of the objective function through the iterative design process consisting of variation and reproduction. The resonant frequencies of initial model are 439.5 MHz, 981.5 MHz and 2.563 GHz. However, the resonant frequencies of the triple-band PIFA yielded by the optimal design program are 430.5 MHz, 907 MHz and 2.4515 GHz. Measured resonant frequencies are 433.5 MHz, 905.5 MHz and 2.454GHz, which show a good agreement with the simulation results.

Optimum design of Triple-band PIFA using Evolution strategy (Evolution strategy 기법을 이용한 삼중대역 PIFA 최적 설계)

  • Ko, Jae-Hyeong;Paek, Hyun;Kim, Koon-Tae;Kim, Tae-Seong;Park, Doh-Hyeon;Ahn, Chang-Hoi;Kim, Hyeong-Seok
    • Proceedings of the KIEE Conference
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    • pp.1561_1562
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    • 2009
  • In this paper, designed triple-band antenna of PIFA(Planar Inverted-F Antenna) structure with U-slot. We designed optimal PIFA structure using Evolution Strategy(ES) about two U-slot parameters. We materialized API(Application Program Interface) about EM simulator and Excel using VB(Visual Basic). The result of ES for triple-band PIFA are resonant frequency of 430MHz, 910.5MHz, 2458.5MHz.

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Development of an Optimal Design Program for a Triple-Band PIFA Using the Evolution Strategy (진화 알고리즘을 이용한 삼중 대역 PIFA 최적 설계 프로그램의 구현)

  • Ko, Jae-Hyeong;Kim, Koon-Tae;Kim, Dong-Hun;Kim, Hyeong-Seok
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.20 no.8
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    • pp.746-752
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    • 2009
  • In this paper, we deal with the development of an optimal design program for a triple-band PTFA(Planar Inverted-F Antenna) of 433 MHz, 912 MHz and 2.45 GHz by using evolution strategy. Generally, the resonance frequency of the PIFA is determined by the width and length of a U-type slot used. However the resonance frequencies of the multiple U slots are varied by the mutual effect of the slots. Thus the optimal width and length of U-type slots are determined by using an optimal design program based on the evolution strategy. To achieve this, an interface program between a commercial EM analysis tool and the optimal design program is constructed for implementing the evolution strategy technique that seeks a global optimum of the objective function through the iterative design process consisting of variation and reproduction. The resonance frequencies of the triple-band PIFA yielded by the optimal design program are 430 MHz, 910.5 MHz and 2.458 GHz that show a good agreement to the design target values.

Design of PIFA with Stacked U-shape Parasitic Patch for GPS/IMT-2000/Bluetooth Application. (U자형 적층 기생패치를 갖는 GPS/IMT-2000/Bluetooth용 PIFA 설계)

  • Shin Kyung-Sup;Kim Yong-Do;Won Chung-Ho;Lee Hong-Min
    • Proceedings of the IEEK Conference
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    • pp.197-200
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    • 2004
  • In this paper, a novel triple-band planar inverted F antenna(PIFA) is proposed. The goal of this paper is to design a small antenna which is operated in triple band. Using T-shape slit and stacked U-shape parasitic patch, good impedance matching is achieved in three band. T-shape slit is inserted on the main patch in order to effectively control the excited patch surface current distributions. The proposed antenna occupies a small volume of $26{\times}9.5{\times}6mm^3$, and the obtained impedance bandwidths cover the required operating bandwidths of the GPS(1565-1585MHz), IMT-2000(1885-2200MHz) and Bluetooth (2400-2484MHz) bands.

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Shorted and Folded Antenna for GSM/DCS/Bluetooth Triple-Band Applications (GSM/DCS/Bluetooth 대역에서 동작하는 단락된 폴딩 구조의 안테나)

  • Kim, Jong-Sung
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.45 no.1
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    • pp.97-102
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    • 2008
  • A new internal antenna for GSM/DCS/Bluetooth application is proposed by using a folded loop resonator. Both feed leg and shorting leg are symmetrically implemented at the center of the folded loop, thus leading to produce resonances at integer frequencies of quarter wavelength. An open stub added at one end of the folded loop can reduce resonant frequencies. The open stub play a role in generating PIFA structure at a GSM band, thus increasing bandwidth, Two resonances at the GSM band are observed at folded ring and PIFA, respectively.

Design of the Broadband PIFA with Multi-Band for SAR Reduction (다중대역을 가지는 SAR 저감용 광대역 PIFA 설계)

  • Choi Donggeun;Shin Hosub;Kim Nam;Kim Yongki
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.16 no.1
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    • pp.66-77
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    • 2005
  • This paper proposed a novel broadband PIFA(Planar Inverted-F Antenna) for IMT-2000/WLAN/DMB terminal. Two branch lines for meander line were utilized in order to improve the characteristics of PIFA which usually has a narrow band. The shorting strip between the ground plane and meander-type radiation elements were used in order to minimize the size of the antenna. The -10 dB return loss bandwidth of a realized antenna was $38.2{\%}$(1.84~2.71 GHz), which contains the broadband bandwidth with triple band. And the simulated and measured values of 1 g and 10 g averaged peak SAR on human head caused by the triple band PIFA mounted on folder-type handsets were analyzed and discussed. As a result, the measured 1 g and 10 g averaged peak SARs of PIFA were similar with the simulated values and were lower than the 1.6 W/kg and 2 W/kg of 1 g and 10 g averaged peak SAR limits.

Triple Band PIFA Internal Antenna GSM/DCS/USPCS Mobile phone handset (GSM/DCS/USPCS 트리플 밴드용 휴대폰 PIFA 안테나)

  • Lee Jonghoon;Son Taeho;Lee ByungSoo;Chang Eungsoon
    • Proceedings of the KAIS Fall Conference
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    • pp.163-165
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    • 2005
  • 본 논문에서는 GSM/DCS/USPCS 대역에서 사용할 수 있는 PIFA 형태의 내장형 안테나를 설계하고 이를 제작하였다. 이 안테나는 제한된 공간에서 기본 PIFA에 적절한 슬릿을 구성하여 트리플 밴드를 형성 시켰으며, GSM 대역에서 Maximum Gain -3.25dB$\~$6.37dB, DCS 대역에서 Maximum Gain -0.46dB$\~$2.95dB의 결과를 얻었다. 방사패턴 또한 전 방향성에 가까운 특성을 가지고 있으며 현재 GPRS용 휴대폰에 적용시키고 있다.

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A Study on Coupling Coefficient and Resonant Frquency tunable Multi-band Internal Antenna (결합계수 및 주파수 튜너블 다중대역 내장형 안테나에 관한 연구)

  • Lee, Moon-Woo;Lee, Sang-Hyun
    • Journal of the Korea Society of Computer and Information
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    • v.15 no.8
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    • pp.59-66
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    • 2010
  • In this paper, the internal antenna for mobile communication handset which is able to control both coupling coefficient and resonant frequency without any major modification of radiator and ground plane of antenna. Novel internal antenna with its controllable resonant frequency is presented for triple-band or over mobile handsets. The operating range can include GSM(880~960 MHz), GPS($1,575{\pm}10MHz$), DCS(1,710~1,880MHz), US-PCS(1,850~1,990 MHz), and W-CDMA(1,920~2,170 MHz). The proposed antenna is realized by combination of a half wavelength loaded line antenna and PIFA(Planner Inverted F Antenna). A single shorting and feeding points are used and they are common to both antenna structures. One of two inductors which is placed at each shorting post, one inductor is for adjusts amount of coupling, and the other controlling the resonant frequency in DCS/US-PCS/WCDMA bands. The inductance range for control of input impedance is between 0nH and 6.8nH, and each of gain variation in GSM, GPS and DCS/US-PCS/WCDMA band is under 0.15dBi, 0.73dBi and 0.29dBi. The inductance range for control of the resonant frequency is between 1640MHz and 2500MHz, and each of gain variation in GSM, GPS and DCS/US-PCS/WCDMA band is under 0.46dBi, 0.53dBi and 0.8dBi.