• Title, Summary, Keyword: CPW-fed

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Compact CPW-Fed Antenna with Triple Folded Patch for WLAN Applications (WLAN 시스템에 적용 가능한 삼중 폴디드 패치를 가진 CPW 급전 소형 안테나)

  • Choi, In-Tae;Shin, Ho-Sub
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.26 no.9
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    • pp.777-782
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    • 2015
  • In this paper, the compact CPW-fed antenna with triple folded patch for dual-band WLAN applications is proposed. As the conventional double inverted-L antenna is changed into the C-shaped patch and double inverted-L antenna, the antenna overcomes the narrow-band characteristics according to the miniaturization of the antenna. The proposed antenna with the size of only $16.5mm{\times}29.5mm{\times}1.0mm$ is designed and fabricated by optimized parameters to be operated at 2.4 GHz band and 5 GHz band. The antenna is fabricated into FR-4 substrate with thickness of 1.0 mm. We confirm that it is operated as antenna for WLAN applications by obtaining the measured return loss level of < -10 dB at dual-band.

Bent slot loop antenna for the dual band wireless LAN (이중대역 무선 랜용 굴곡형 슬롯 루프 안테나)

  • Lee, Young-Soon;Im, Seong-Gyun
    • The Journal of Advanced Navigation Technology
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    • v.16 no.1
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    • pp.27-34
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    • 2012
  • In this paper, Coplanar waveguide(CPW)-fed slot loop antenna, which is applicable to the dual band(2.4GHz~2.4835GHz, 5.15GHz~5.825GHz) for the wireless LAN, is proposed. In order to miniaturize the proposed antenna, slot loop is bent by meandering. The resonant frequencies in the required dual band are adjusted by variation of the resonant length of slot loop as well as slot width. In particular, use of capacitive coupling CPW feed provides impedance matching without a seperate matching circuit, because the amount of electromagnetic coupling can be controlled by the offset between feed and radiator. As a result, it has been observed that the proposed antenna satisfies not only the required return loss(${\leq}10dB$) but also has high efficiency(${\geq}80%$) over the whole frequency band. In order to check the validity of the proposed antenna, some simulated results for return loss and radiation pattern are presented in comparison with the measured results.

A CPW-Fed Ultra-Wideband Planar Monopole Antenna for UHF Band Applications (UHF 대역용 CPW 급전 초광대역 평면형 모노폴 안테나)

  • Yoo, Tae-Hoon;Kim, Tae-Hyung
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.23 no.7
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    • pp.761-767
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    • 2012
  • In this paper, a novel ultra-wideband planar monopole antenna for the UHF communications and Digital-TV reception is proposed. The proposed antenna fed by a coplanar waveguide(CPW) is based on a triangular patch that has a broadband characteristic. To further increase the bandwidth of the triangular patch antenna, the top side of the regular triangular patch is loaded with a notch cut and each oblique side with a step. In addition, a slope is given to the ground plane of the CPW structure. Experimental results show that the -10 dB return loss bandwidth of the proposed antenna is 2,320 MHz from 480~2,800 MHz(5.83:1 bandwidth), which covers all the frequency bands of the various wireless communication systems and Digital TV broadcasting in the UHF band. Within the entire operating frequency range, the measured antenna gain in y-z plane(E-plane) varies from 3.01 to 4.71 dBi.

Design and Fabrication of the Printed Type Folded Slot Antenna (인쇄회로형 폴디드 슬롯 안테나 설계ㆍ제작)

  • 송면규;양규식
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.301-304
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    • 1999
  • In general, printed antennas have a narrow bandwidth characteristic and many people want to find out the method of bandwidth improvement through complicated procedure. So we want to reform the conventional printed antenna characteristic by using the folded dipole's superiority to unit dipole. But it is hard to feed thr printed folded dipole antenna, we use the CPW, which is widely used in microwave IC or MMIC applications and have many advantage to the conventional microstrip line, to feed the folded slot antenna. It is confirmed that the improvement in the bandwidth characteristic of CPW fed folded slot antenna, as much as 20%, through the measurment of designed and implemented antenna.

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Design and Performances of Implantable CPW Fed Apollian Shaped Antenna at 2.45 GHz ISM Band for Biomedical Applications

  • Kumar, S. Ashok;Sankar, J. Navin;Dileepan, D.;Shanmuganantham, T.
    • Transactions on Electrical and Electronic Materials
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    • v.16 no.5
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    • pp.250-253
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    • 2015
  • A novel implantable CPW fed Apollian shaped antenna embedded into human tissue is proposed for ISM band biomedical applications. The proposed antenna is made compatible for implantation by embedding it in an alumina ceramic substrate(εr=9.8 and thickness= 0.65 mm). The proposed antenna covers the ISM band of 2.45 GHz. The radiation parameters such as return loss, xy-plane, xz-plane, and yz-plane etc., are measured and analyzed using the agilent vector network analyzer. The proposed antenna has substantial advantages, including low profile, miniaturization ability, lower return loss, better impedance matching, and high gain over conventional implanted antennas.

Design of Implantable CPW Fed Monopole Antenna for ISM Band Applications

  • Kumar, S. Ashok;Shanmuganantham, T.
    • Transactions on Electrical and Electronic Materials
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    • v.15 no.2
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    • pp.55-59
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    • 2014
  • An implantable CPW fed monopole antenna embedded into human tissue is proposed for ISM band biomedical applications. The proposed antenna is made compatible for implantation by embedding it in an alumina ceramic substrate (${\Box}_r=9.8$ and thickness=0.65 mm). The proposed antenna covers the ISM band of 2.45 GHz. The radiation parameters, such as return loss, E-Plane, H-Plane, are measured and analyzed, using the method of moments. The proposed antenna has substantial merits over other implanted antennas, like low profile, miniaturization, lower return loss, and better impedance matching and high gain.

A Novel Compact CPW-fed Antenna with Multi-resonance Mode

  • Choi, Hyo-Sub;Ko, Jae-Jin;Lee, Chul-Dong
    • Journal of information and communication convergence engineering
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    • v.8 no.6
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    • pp.635-639
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    • 2010
  • A multi-resonance antenna for wireless communications is reported. By using double inverted-L strips, the antenna demonstrated compact size (15 mm ${\times}$ 14 mm) including the ground, multi-band operation for IEEE 802.11 a/b/g/p applications, and wide bandwidth of 1.7 GHz at 5 GHz band. Good radiation features of omni-directional patterns and 1.98 and 2.29 dBi peak antenna gains for the lower and upper bands, respectively, have been achieved.

Design of a U-Type Planar UWB Antenna Composed of Monopole Pair (모노폴 쌍으로 구성된 U자형 평면 UWB 안테나 설계)

  • Lee, Ho-Sang;Jang, Jae-Sam;Jung, Young-Ho;Kim, Cheol-Bok;Kim, Jae-Hoon;Park, Seung-Bae;Lee, Mun-Soo
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.45 no.9
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    • pp.60-66
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    • 2008
  • In this paper, the CPW-fed Ultra-wideband antenna is designed and fabricated for UWB communications. To achieve ultra-wide bandwidth of the antenna, we propose the mutual coupling of two planar monopole antennas. The mutual coupling of monopole pair of the proposed antenna is optimized by adjusting the parameters, the widths of the planar monopoles and the space between two monopoles. Two UWB antennas with different horizontal sections of the CPW-fed monopole antenna are fabricated and measured to examine the mutual coupling effects on the monopole pair antenna. The measured result show that two antennas are satisfied with UWB communication band(3.1$\sim$10.6Ghz).

Design of Ultra Waveband Coplanar Waveguide-Fed L-planar Type Monopole Antennas (초광대역(UWB) Coplanar Waveguide 급전 L자 평면형 모노폴 안테나 설계)

  • Kim, Joon-Il;Lee, Won-Taek;Chang, Jin-Woo;Jee, Yong
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.18 no.1
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    • pp.82-89
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    • 2007
  • This paper presents a coplanar waveguide fed L-planar type monopole antenna which covers ultra wideband(UWB) region of 3.1 GHz to 10.6 GHz. The proposed UWB L-planar type monopole antenna is designed and implemented on the organic substrates( ${\varepsilon}_{r}=3.38,\;@10\;GHz$). The radiation elements, feed line, and ground planes of the antenna are printed on the same conductive layer of the substrates. The bandwidth of the proposed antenna is measured in the range of 3.0 GHz to 11.0 GHz. The measured radiation patterns are symmetrical in E-plane and omni-directional in H-plane. Antenna gains ranges from 1.4 dBi to 4.6 dBi. The proposed UWB antenna shows that the structure is adequate for the design of RFIC.

LTCC Stacked Patch Antenna for 19GHz Band WLAN (19GHz대역 무선랜용 LTCC 적층형 패치 안테나)

  • Yeom, Chan-Kyu;Lee, Yun-Bok;Kim, Young-Do;Lee, Hong-Min
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • pp.423-427
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    • 2003
  • In this paper, LTCC stacked patch antenna with a radial CPW fed slot and grounded-shorting vertical-via wall for 19GHz band wireless LAN is presented. Suggested antenna employed a patch and grounded-shorting vertical-via wall for radiation element, consist of feeding structure which a radial open feature at the end of the CPW feed line. The optimal design parameters of the antenna using by EM simulation program. We can see that enough to bandwidth 560MHz for 19GHz band WLAN antenna specification by the optimized antenna.

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