• Title, Summary, Keyword: CPW-fed

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A Design and Implementation of CPW-fed Antenna with Two Branch Strip for WLAN Applications (WLAN 적용을 위한 두 개의 분기 선로를 갖는 CPW 급전 모노폴 안테나의 설계와 제작)

  • Yoon, Joong-Han;Choi, Young-Kyu
    • The Journal of the Korea institute of electronic communication sciences
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    • v.10 no.4
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    • pp.441-448
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    • 2015
  • In this paper, a CPW-fed dual-band monopole antenna with two branch strips for WLAN(Wireless Local Area Networks) applications was designed, fabricated and measured. The proposed antenna is based on a CPW-feeding structure, and composed of two branch strips and then designed and tuned the length of two branch lines to obtained required frequencies bands. To obtain the optimized parameters, we used the simulator, Ansoft's High Frequency Structure Simulator(HFSS) and carried out simulation about parameters $L_5$, $L_8$, $W_3$, $W_5$, $W_9$. The proposed antenna is fabricated on the FR-4 substrate using the obtained parameters. The numerical and experiment results demonstrated that the proposed antenna obtained the -10 dB impedance bandwidth 1,095 MHz (1.57~2.665 GHz) for 2.4 GHz band and 1,680 MHz (4.99~6.67 GHz) for 5 GHz band satisfied requirement while simultaneously covering the WLAN bands. And characteristics of gain and radiation patterns are determined for WLAN operating bands.

Dual-band Compact CPW-fed Slot Antenna for WLAN applications (WLAN 시스템용 이중 대역 CPW 소형 슬롯 안테나)

  • Choi, In-Tae;Shin, Ho-Sub
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.20 no.1
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    • pp.1-7
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    • 2016
  • In this paper, the compact CPW-fed slot antenna for WLAN applications is proposed. While the proposed antenna with size of only $20{\times}18{\times}1mm^3$ is consisted of double stub and folded slot, the antenna for 2.4 GHz band and 5 GHz band is designed and fabricated with optimized parameters obtained by simulation. Proposed antenna is fabricated with FR-4 substrate to the thickness of 1.0 mm. By obtaining the measured return loss level of < -10 dB at dual-band, we showed that it is operated as antenna for WLAN applications, and then it is also expected to be usable as antenna for RFID.

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

  • Shin, Kyung-Sup;Kim, Young-Do;Yeom, Chan-Kyu;Lee, Hong-Min
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • pp.524-527
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    • 2003
  • 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 impedance bandwidth of the proposed antenna is about 12:1 ($2.0GHz{\sim}24.3GHz$) with $VSWR{\le}2$. Simulation results for return loss and radiation pattern are presented.

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A Technique for Broadbanding the CPW-Fed Bow-Tie Slot Antenna

  • Kim Sung-Hak;Wen Lijun;Ko Han-Woong;park Dong-Hee;Ahn Bierng-Chearl
    • Journal of electromagnetic engineering and science
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    • v.5 no.1
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    • pp.14-20
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    • 2005
  • In this paper, a technique is presented for broadbanding the bow-tie slot antenna fed by a CPW(coplanar waveguide). The bandwidth performance of existing bow-tie slot designs is greatly enhanced by optimizing the slot shape and properly adjusting the characteristic impedance of the coplanar waveguide feeding the slot. To connect the 50-ohm input coaxial line to the CPW feed line, a linear taper in the CPW is employed. The designed antenna shows a 3.5 $\~$ 10.0 GHz impedance bandwidth, a 3.5 $\~$ 6.0 GHz pattern bandwidth, and a 5.5 $\~$ 7.5 dBi gain over 3.5 $\~$ 6.0 GHz. Above 6.0 GHz, the antenna radiation pattern appreciably deviates from the typical dipolar pattern.

Design and Fabrication of a CPW-Fed Monopole Antenna using Inverted L type DGS Structures (역L형 DGS를 이용한 CPW급전 모노폴안테나 설계 및 제작)

  • Ryu, Cheong-Ho;Jung, Chang-Gyun;Kim, Jeong-Geun
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • pp.303-306
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    • 2005
  • In this paper, a CPW-fed monopole antenna using inverted L-type DGS structures is proposed and investigated experimentally. The proposed antenna is fabricated into FR4 substrate with dielectric constant($\varepsilon$r=4.5). Measured results show that the impedance bandwidth, determined from 10-dB return loss, for frequencies between 5.7250Hz-5.825CHz under the condition of VSWR$\leqq$2 is about 540MHg.

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A Step Type Dipole Antenna with Tapered Balun by CPW-fed to CPS (테이퍼드 발룬을 포함한 계단형의 다이폴 안테나 설계 및 구현)

  • Lee, Hyeonjin;Kim, Tea-Hong
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.64 no.3
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    • pp.116-120
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    • 2015
  • In this paper, a step type driver dipole antenna with a tapered balance and unbalance (balun) by a coplanar waveguide (CPW) to coplanar strip (CPS) transition is proposed. The proposed antenna consisted of step type driver, a CPW to CPS transition and tapered balun. The proposed antenna is realized the multi and wide resonate frequency band to introduce the step type driver and tapered balun. The step type driver is acted as a director too. This antenna could be more easily designed than the conventional printed quasi-Yagi dipole antenna. The operating frequency bandwidth was 650 [MHz] (2.65~3.3 GHz), 900 [MHz] (4.7~5.6 GHz) under a return-loss criterion of less than 10 dB. The measurements of the proposed antenna exhibited good results in the wideband operating frequency and radiation pattern. The proposed antenna can support wireless communications applications.

Miniaturization of a CPW-fed Dual-Band Antenna for GSM 1800/1900 and WLAN 5 GHz Applications

  • Borah, Janmoni;Sheikh, Tasher Ali;Roy, Sahadev
    • Transactions on Electrical and Electronic Materials
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    • v.18 no.2
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    • pp.119-123
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    • 2017
  • This paper presents a unique and miniaturized dual-band coplanar waveguide (CPW-fed) antenna for modern wireless communication. A new technique of using a modified ground structure (MGS) and frequency shifting strips (FSS) has been employed in the design to achieve dual-frequency operation. The proposed antenna generates two separate impedance bandwidths and covers the minimum required frequency bands of GSM 1800, GSM 1900, and Wi-Fi/WLAN 5 GHz. The proposed antenna is relatively small ($17{\times}20mm^2$) and operates over frequency ranges 1.51~2.06 and 4.43~6.70 GHz. The designed antenna was simulated using Ansoft HFSS, a FEM based simulator, and antenna characteristics, such as reflection coefficient, gain, radiation efficiency, radiation pattern, impedance bandwidth, VSWR, surface current, and electric field distributions, are reported in this paper. The effect of the antenna's key structural parameters on its performance is also analyzed.

Design of CPW-Fed Small Multi-Band Antenna by Using Band Rejection Semicircle Slot

  • Li, Xiao;Lee, Seung-Woo;Kim, Nam;Kim, Chul-Ho
    • Journal of electromagnetic engineering and science
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    • v.11 no.3
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    • pp.207-212
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    • 2011
  • This paper presents a CPW-fed antenna with three slots. The proposed antenna can operate at 1.9~2.1 GHz and 2.9~3.3 GHz which are generated by the two rectangular slots, and 4.5~11.6 GHz which is generated by the main patch. The semicircle-slot is used as a band-notched filter to stop at a desired band (5.150~5.825 GHz) limited by IEEE 802.11a or HIPERLAN/2 applications. The currents concentrate around corresponding slots at the desired band. The proposed antenna is very small in size, with overall dimensions of $27{\times}32{\times}1\;mm^3$ etched onto an FR4-printed circuit board (PCB).

A Design for a CPW-Fed Monopole Antenna with Two Modified Half Circular Rings for WLAN/WiMAX Operations

  • Kim, Woo-Su;Yoon, Joong-Han
    • Journal of information and communication convergence engineering
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    • v.13 no.3
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    • pp.159-166
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    • 2015
  • In this paper, a novel design for a triple-band coplanar waveguide (CPW)-fed monopole antenna for WLAN/WiMAX operations is proposed. The proposed antenna is printed on an FR4 substrate with an area of 22.0 mm × 30.0 mm, a thickness of 1.0 mm, and a relative permittivity of 4.4. The effects of various parameters of the proposed for triple band operation is investigated. Two half circular rings and a microstrip feed line are fabricated on the substrate to achieve triple band operation and good impedance matching. Prototypes of the proposed antenna have been fabricated and tested. Experiment results reveal that the measured return loss exhibits an acceptable agreement with the simulated return loss and satisfies the impedance bandwidth requirement of -10 dB, while simultaneously covering the WLAN and WiMAX bands. In addition, the proposed antenna shows good radiation characteristics and gains in the three operating bands.

Design of Compact CPW-fed Slot Antenna Using Split-Ring Resonators (분할 링 공진기를 이용한 소형 CPW급전 슬롯 안테나 설계)

  • Park, Jin-Taek;Yeo, Junho;Lee, Jong-Ig
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.18 no.10
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    • pp.2351-2358
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    • 2014
  • In this paper, a design method for a compact CPW-fed slot antenna using SRRs is studied. The structure of the proposed slot antenna is a rectangular slot antenna loaded with SRR conductors inside the slot to reduce the antenna size. Optimal design parameters are obtained by analyzing the effects of the gap between the SRR conductors and slot, and the width of the SRR conductors on the input VSWR characteristic. The optimized compact slot antenna operating at 2.45 GHz band is fabricated on an FR4 substrate with a dimension of 36 mm by 30 mm. The length of the proposed compact slot antenna is reduced to 14.3% compared to that of a conventional rectangular slot antenna. Experiment results show that the antenna has a desired impedance characteristic with a frequency band of 2.4-2.49 GHz for a VSWR < 2, and measured gain of 2.3 dBi at 2.45 GHz.