• Title, Summary, Keyword: CPW-fed

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A Planar Yagi-Uda Dipole Antenna with Dual Tapered Balun by CPW-fed to CPS (CPW-fed to CPS 전이 급전에 의한 이중 테이퍼드 발룬을 포함한 평판형 Yagi-Uda 다이폴 안테나 설계)

  • Lee, Hyeonjin;Kim, Tea-Hong
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.64 no.4
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    • pp.207-211
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    • 2015
  • In this paper, we proposed a broadband planar Yagi-Uda dipole antenna with dual tapered balance and unblance (balun) by CPW-fed to CPS. This antenna consisted of driver, three directors, dual tapered balun and CPS-fed to CPS. The fed structure of CPW-fed to CPS had a benefit points much simpler than other planar Yagi-Uda antennas and provided design more flexibility in arranging the reflector. The proposed antenna is introduced dual tapered balun to improve the impedance matching. It balun is inserted between the CPW-ground and the CPS. The proposed antenna is exhibited the bandwidth of 4.78 GHz (1.94~6.72 GHz) (S11 < -10 dB) and the gain of 4.9~7.2 dBi within that bandwidth. This antenna will applicate wireless communication.

Designs on CPW-FED Aperture Antenna for UWB Applications for Wireless System in a Ship (선박 내 무선 시스템을 위한 UWB용 CPW-FED APERTURE 안테나 설계)

  • Kim, Kab-Ki
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.14 no.4
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    • pp.347-351
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    • 2008
  • In this paper, a new co-planar waveguide ultra-wideband aperture is designed as wireless application in ships. The designed antenna consists of a rectangular aperture on a determined ground plane and a mushroom shaped stub. The mushroom-shaped stub, which is simple, convenient to analyze and optimise, has less parameters. This antenna has compact aperture size $21.1{\times}8.1mm^2$, designed on FR-4 substrate with dielectric constant of 4.3, thickness of 1.5mm. CPW fed planar antenna has the advantages of wide-bandwidth, low-cost and easy interaction with the radio frequency front end circuitry.

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Design of a CPW-fed Double-Dipole Quasi-Yagi Antenna (CPW 급전 이중 다이폴 준-야기 안테나 설계)

  • Yeo, Junho;Lee, Jong-Ig
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.22 no.11
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    • pp.1518-1523
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    • 2018
  • A method for designing a DDQYA fed by a CPW is proposed in this paper. The proposed CPW-fed DDQYA consists of two series-connected strip dipoles, a ground reflector, and a strip-pair director. Instead of the conventional microstrip feed line in which the signal line is located on the substrate opposite to the antenna, a CPW is used because CPW is located on the same side with the antenna, and so the fabrication is easy. The strip-pair director is composed of two horizontally-separated strips, and it is added above the second dipole to enhance the gain in the high frequency region. A prototype of the proposed CPW-fed DDQYA is fabricated on an FR4 substrate. The fabricated antenna has a frequency band of 1.66-3.38 GHz(68.3%) for a voltage standing wave ratio < 2, and measured gain ranges 5.0-7.3 dBi over a frequency band of 1.60-2.90 GHz.

Designs on CPW-FED aperture antenna for uwb applications (UWB용 CPW-FED APERTURE 안테나 설계)

  • Jo, Sung-Sik;Park, Chang-Hyun;Park, Jung-Ah;Kim, Kab-Ki
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.303-307
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    • 2008
  • In this paper, a new co-planar waveguide ultra-wideband aperture is designed. The designed antenna consists of a rectangular aperture on a determined ground plane and a mushroom shaped stub. The mushroom-shaped stub, which is simple, convenient to analyze and optimise, has less parameter. This antenna has compact aperture size $21.1{\times}8.1mm^2$, designed on FR-4 substrate with dielectric constant of 4.3, thickness of l.5mm. CPW fed planar antenna has the advantages of wide-bandwidth, low-cost and easy interaction with the radio frequency front end circuitry.

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A Broadband Characteristic of Wide Slot Planar Antenna By CPW-Fed (CPW급전에 의한 폭넓은 평면 슬롯안테나의 광대역특성)

  • Lee, Hyeon-Jin;Seo, Jang-Soo
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.58 no.4
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    • pp.374-376
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    • 2009
  • In this paper, a CPW fed and inversed U-type monopole structure wide slot antenna for novel broadband calacturictics is proposed. To enhance the impedance bandwidth of the wide slot antenna, we proposed the wide slot structure with cpw-fed which is combined with four $\lambda/2$ rectangular radiation modified monopole and inductively coupled. The measured impedance bandwidth is about 2.3 GHz(3.85~6.15 GHz) at 10 dB and the simulated antenna gain is about 6 dBi at 5.4 GHz.

CPW-fed to CPS Dipole Antenna of Microstrip Tapered Balun with Triangular Loop Director

  • Lee, Hyeonjin
    • Journal of Electrical Engineering and Technology
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    • v.9 no.4
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    • pp.1365-1368
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    • 2014
  • A CPW-fed to CPS dipole antenna of triangular loop director by microstrip tapered balun is proposed for dual and wide band operations, in this paper. The proposed antenna is consisted of a CPW-fed to CPS transform, microstrip tapered balun element, CPS dipole driver and triangular loop director. A dual and wide bandwidth of the proposed dipole antenna is realized by introducing the triangular loop director and taper matching element. The operated frequency bandwidth is 1GHz (2.14~3.14 GHz) and 1.9 GHz (4.6~6.5 GHz) to return loss criterion of less than 10 dB. The measured return loss of the proposed antenna showed good results of the dual and wide band operating frequency and the radiation pattern. The proposed antenna is able to support WLAN wireless communications applications.

Design of the CPW-Fed Triple-band Internal Planar Monopole Antenna (CPW 급전 삼중대역 내장형 평면 모노폴 안테나 설계)

  • Lim, Jung-Sup;Kim, Cheol-Bok;Jang, Jae-Sam;Lee, Ho-Sang;Jung, Young-Ho;Cho, Dong-Ki;Lee, Mun-Soo
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.44 no.12
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    • pp.73-78
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    • 2007
  • In this paper, the CPW-fed triple-band internal planar monopole antenna which simultaneously meets the three bands such as Cellular, PCS and Wibro is designed. The size of the radiation elements can be reduced to about $\lambda/4$ by designing the CPW-fed monopole antenna and then we can miniaturize the antenna size by meandering the radiation elements. In addition, we design the planar antenna for the slim-type mobile phone. We can obtain the desired antenna properties by controlling the length of each radiation elements. The measured return loss of the antenna is less than -7 dB at the desired bandwidth. And the measured radiation patterns are similar to that of the monopole antenna. The designed antenna has the gains -5.2 dBi. -2 dBi, -0.4 dBi at each resonant frequencies respectively.

CPW-fed Broadband Monopole Antenna for HDTV Reception (CPW로 급전되는 HDTV용 광대역 모노폴 안테나)

  • Lee, Jong-Ig;Han, Dae-Hee;Kim, Soo-Min;Kim, Gun-Kyun;Yeo, Junho
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.564-566
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    • 2012
  • In this paper, a design method for a compact broadband planar monopole antenna fed by coplanar waveguide (CPW) is studied. The proposed broadband monopole is optimized for terrestrial digital television (DTV) receiving. The monopole is fed by a CPW with 75-ohm characteristic impedance on an FR4 substrate and its size is $100mm{\times}200mm$. A pair of slit is appended for size reduction and an inductive stub is loaded for the impedance matching between the feedline and monopole. The optimized monopole antenna for DTV band (470-806 MHz) is fabricated on an FR4 substrate and tested experimentally to verify the results of this study.

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CPW-fed Wideband Loop Antenna for Indoor Digital TV Applications (실내 디지털 TV용 CPW-급전 광대역 루프 안테나)

  • Yeo, Junho;Lee, Jong-Ig
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.21 no.8
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    • pp.1492-1497
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    • 2017
  • In this paper, a design method for a CPW-fed wideband loop antenna for indoor digital TV applications is studied. The proposed loop antenna consists of a square loop and two circular sectors which connect the loop with central feed points, and the CPW feed line is inserted in the lower circular sector. The CPW feed line is designed to match with the 75 ohm port impedance for DTV applications, and the ground slots are etched in order to improve the impedance matching in the middle frequency region. The effects of the gap between the circular sectors and the location and dimension of the ground slots on the input reflection coefficient and gain characteristics are examined to obtain the optimal design parameters. The optimized antenna is fabricated on FR4 substrate, and the experiment results show that it operates in the frequency band of 463-1,280 MHz for a VSWR < 2, which assures the operation in the DTV band.

Design of Wide-Band Slot Antenna with CPW-Fed (CPW 급전 광대역 슬롯 안테나 설계)

  • 김명석;신경섭;김영두;이홍민
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.15 no.2
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    • pp.212-216
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    • 2004
  • In this paper, a new design for a Coplanar Waveguide(CPW) fed wide-band slot antenna is presented. To enhance the impedance bandwidth of the slot antenna, we proposed the tapering slot structure. A various resonance modes are generated in the tapering slot. The measured impedance bandwidth of the proposed antenna is about 13:1(2.0 GHz∼25.9 GHz) with VSWR$\leq$2. Simulation and measurement results for return loss and radiation pattern are presented.