• Title, Summary, Keyword: slot antenna

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The effective of Radiation Pattern on Two Shape of Slot Antenna

  • Chanwattanapong, W.;Anantrasirichai, N.;Wakabayachi, T.
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1660-1663
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    • 2003
  • This paper present the characteristics of radiation pattern of microstrip slot antenna on the ground plane fed by microstrip line. It is proposed for resonance frequency at 10 GHz. We will analysis two shape of slot antenna; double L-shape slot antenna and U-shape slot antenna. In this case, we will compare far-field radiation pattern of two shape slot antenna. Far-field radiation pattern of double L-shape slot antenna is bi-directional nevertheless U-shape slot antenna is uni-directional. The microstrip slot antenna is propose to analyze far-field radiation pattern for use in the wireless communication systems

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5 GHz Bow-tie-shaped Meander Slot Antenna

  • Wi, Sang-Hyuk;Kim, Jung-Min;Yoo, Tae-Hoon;Park, Jae-Yeong;Yook, Jong-Gwan;Park, Han-Kyu
    • Journal of electromagnetic engineering and science
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    • v.2 no.1
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    • pp.50-55
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    • 2002
  • In this paper, Ive propose a bow-tie-shaped meander slot antenna find by a microstrip line to achieve compact size as well as wideband characteristic. While conventional bow-tie slot antennas exhibit wide band characteristic, they have relatively large size. On the other hand, the meander slot antennas are very small, but they reveal quite narrow bandwidth (typically less than 1 %). To realize miniaturized antennas balling large bandwidth, combination of the bow-tie slot and the meander slot geometries is proposed in this paper. Theoretical results show that the proposed antenna with uniform slot width is 65.5 % smaller than that of the conventional bow-tie antenna in size, while the bandwidth is 3 times larger than that of the meander slot antenna. Moreover, the non-uniform slot width antenna shows 60 % smaller in size and about 3.5 times wider in bandwidth than the previous antennas. Measured antenna performance reveals excellent agreement with the predicted values.

Uniform Slot Width Bow-tie-shaped Meander Slot Antenna for 5 GHz Application (균일한 슬롯 폭을 갖는 5 GHz 대역 보우타이 형태의 미앤더 슬롯 안테나)

  • 위상혁;김정민;유태훈;육종관;박한규
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.13 no.8
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    • pp.769-776
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    • 2002
  • In this paper, we propose uniform slot width bow-tie-shaped meander slot antenna for 5 GHz application. The conventional bow-tie slot antenna has broadband characteristic, however, its size is large. Meanwhile, the meander slot antenna has small size, but it has quite narrow bandwidth. The proposed antenna geometry is a variation of the meander slot antenna incorporating bow-tie shape to realize miniaturized antenna having relatively large bandwidth. Simulated results show that with the same slot width and total slot length, the bandwidth of the proposed antenna is 3 times wider than that of meander slot antenna, and its resonant frequency is 3.01 GHz lower than that of the equal size(H x V) bow-tie slot antenna, and measured results show that the bandwidth of proposed antenna is 218 MHz(5.142 GHz ~ 5.360 GHz) which satisfy the required bandwidth from 5.15 GHz to 5.35 GHz.

Compact Dual-Band Half-Ring-Shaped Bent Slot Antenna for WLAN and WiMAX Applications

  • Yeo, Junho;Lee, Jong-Ig
    • Journal of information and communication convergence engineering
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    • v.15 no.4
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    • pp.199-204
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    • 2017
  • A compact dual-band half-ring-shaped (HRS) bent slot antenna fed by a coplanar waveguide for wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications is presented. The antenna consists of two HRS slots with different lengths and widths. The two HRS slots are connected through an arc-shaped slit, and the upper HRS slot is bent in order to reduce the size of the antenna. The optimized dual-band HRS bent slot antenna operating in the 2.45 GHz WLAN and 3.5 GHz WiMAX bands is fabricated on an FR4 substrate with dimensions of 30 mm by 30 mm. The slot length of the proposed dual-band slot antenna is reduced by 35%, compared to a conventional dual-band rectangular slot antenna. Experimental results show that the proposed antenna operates in the frequency bands of 2.40-2.49 GHz and 3.39-3.72 GHz for a voltage standing wave ratio of less than 2, and measured gain is larger than 1.4 dBi in the two bands.

A 28-GHz Wideband 2×2 U-Slot Patch Array Antenna

  • Yoon, Nanae;Seo, Chulhun
    • Journal of electromagnetic engineering and science
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    • v.17 no.3
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    • pp.133-137
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    • 2017
  • In this study, a 28-GHz U-slot array antenna for a wideband communication system is proposed. The U-slot patch antenna structure consists of a patch, two U-shaped slot, and a ground plane. With the additional U-slot, the proposed antenna has around 10% of bandwidth at -10 dB. To increase gain, the U-slot antenna is arrayed to $2{\times}2$. The proposed antenna is designed and fabricated. The $2{\times}2$ array antenna volume is $41.3mm{\times}46mm{\times}0.508mm$. The proposed antenna was measured and compared with the simulation results to prove the reliability of the design. The bandwidth and gain of the measurement results are 3.35 GHz and 13 dBi, respectively and the operating frequency is around 28 GHz.

A Design of Wideband Printed Dual Meandered Slot Antenna (인쇄회로형 광대역 이중 미앤더드 슬롯 안테나 설계)

  • 이윤경;임계재;이재용;윤현보
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.13 no.3
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    • pp.243-250
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    • 2002
  • This paper designed a compact printed meandered scot antenna which to integrate in wireless LAN and proposed a printed dual meandered slot antenna for improving bandwidth. A printed dual meandered slot antenna is calculated by using the mehtod of FDTD. The calculated results showed good agreement with the measured results. As a result of measurement, the bandwidth(VSWR< 2) of single meandered slot antenna is 115 MHz and the bandwidth of dual meandered slot antenna is 164 MHz. The dual meandered slot antenna bandwidth has been improves to that of 43% comparing to single meandered slot antenna.

The Characteristic of L-shape and Triangular Slot Antenna

  • Narkcharoen, K.;Charkrit, P.;Anantrasirichai, N.;Wakabayashi, T.
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1680-1683
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    • 2003
  • To describe the performance of an antenna, some parameters are necessary. Some of the parameters are interrelate and not all of them must be specified for complete description of antenna performance. The parameters in characteristics of printed antenna for this analysis are radiation pattern, input impedance, VSWR, S parameter and electromagnetic field. In this paper we will consider two shaped of slot antennas one is triangular slot antenna and other is L - shape slot antenna for compare the radiation pattern, return loss, and VSWR. Two slot antennas are designed to have a resonant frequency at 10 GHz. The microstrip line is designed to be 50 ohms in order to match the measurement system, it has the substrate of the thickness = 1.52 mm and dielectric constant (${\varepsilon}_r$) 2.17. The problem space in the FDTD analysis are $60{\times}123{\times}100$ cells for L-shape slot antenna and $50{\times}171{\times}120$ cells for triangular slot antenna with the cell dimensions ${\Delta}x=0.152\;mm.$, ${\Delta}y={\Delta}z=0.15\;mm.$

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Design and Fabrication of a Broadband Microstrip Slot Antenna with a Fork-shaped Feedline (포크모양의 급전선로를 갖는 광대역 마이크로스트립 슬롯 안테나 설계 및 제작)

  • 문영길;김흥수
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.41 no.8
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    • pp.87-92
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    • 2004
  • In this paper, a microstrip slot antenna with a fork-shaped feedline is designed and fabricated. To obtain a broadband characteristic of a wide slot antenna a feedline is transformed into a shape of a fork, and a size of the slot and offset - length is varied. As the characteristics of the slot antenna as the function of design parameters are analyzed, a broadband microstrip slot antenna is designed. The microstrip slot antenna with a fork-shaped feedline is fabricated and its measured bandwidth is from 1.65 GHz to 6.20 GHz for VSWR$\leq$2.

Design and Fabrication of the Hybrid Slot Antenna for Wireless LAN at 5.8㎓ Band (5.8㎓ 대역 무선 LAN용 하이브리드 슬롯 안테나 설계 및 제작)

  • 고수미;이권익;김흥수
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.39 no.10
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    • pp.21-26
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    • 2002
  • In this paper, a hybrid slot antenna is designed and fabricated for wireless LAN at 5.8㎓ band. The hybrid slot antenna is consisted of the inductively-fed slot and capacitively-fed slot. To obtain wide bandwidth, the inductively-fed slot is designed at 5.3㎓ and the capacitively-fed slot is designed at 5.8㎓ Important parameters in the design are slot width and CPW length. The hybrid slot antenna is simulated by using Ensemble 6.0. The measured results of this antenna are compared with its simulated results. The resonant frequency of fabricated hybrid slot antenna is 5.8㎓, the bandwidth for VSWR<1.5 is 28% and the gain is 5 ㏈i. The 3-㏈ beamwidths in E-plane and H-plane are 60°and 44°, respectively.

The Wide-band Two-element Microstrip Slot Array Antenna with the Cross-shaped Feedline

  • Shin, Ho-Sub;Kim, Nam;Jang, Yong-Woong
    • Proceedings of the IEEK Conference
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    • pp.163-166
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    • 2000
  • The design, numerical simulation, and an experimental implementation of two-element cross-shaped microstrip line-fed printed slot array antenna for IMT-2000 at the 2.0 GHz band is presented in this paper. The proposed antenna with relative permittivity 4.3 and thickness 1.0mm is analyzed by the Finite-Difference Time-Domain (FDTD) method. It was shown that the measured 2.0 VSWR bandwidth of one-element microstrip slot antenna is from 1.42 GHz to 2.69 GHz, which is approximately 61.8% and that of two-element microstrip slot array antenna is from 1.42 GHz to 2.56 GHz, which is approximately 57.3% And it was shown that the measured gain of one-element microstrip slot antenna is 2.75 dBi and that of two-element microstrip slot antenna is 4.75 dEi. The antennas were fabricated and tested. The measured results are in good agreements with the FDTD results.

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