• Title/Summary/Keyword: dual-band antenna

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Design of Dual-band Monopole Antenna for MIMO System (MIMO 시스템을 위한 이중대역 모노폴 안테나의 설계)

  • Kim, Bit-Na;Bayarmaa, O.;Park, Sae-Pil;Joo, In-Ung;Kim, Kab-Ki
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.70-72
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    • 2011
  • In this paper, Dual-band monopole antenna for MIMO system is proposed. At this time the FR-4 substrate was used as a dielectric is 4.4, the size of 83mm * 50mm * 1.6mm size 3mm, the width of the proposed antenna by a $50{\Omega}$ microstrip line feed, and, LTE in the frequency 746-787MHz, 1710-1755MHz has been designed to operate at the resonant frequency less than-10dB and showed a good return loss in the operation.

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Design of dual-band compact antenna with a deformed ground plane (변형된 접지구조를 갖는 이중대역 소형 안테나 설계)

  • Chae, Gyoo-Soo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.8 no.4
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    • pp.815-820
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    • 2007
  • In this paper, a small internal antenna for dual-band(RFID, PCS) applications is presented. The proposed antenna is a basic PIFA type and has a deformed ground plane under the main radiator. The modified ground plane is spreading the surface current and the antenna miniaturization can be achieved due to the coupling effect. The antenna is manufactured according to the simulation results and the resonance frequency move to low frequency band by 150MHz. And the surface current on the radiator and ground plane is evenly distributed so our suggested antenna can be used for better SAR and HAC performance.

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A Handset Antenna Design with the Real-Portable Mock-Up and Its HAC with the Hand-Effect (착용환경을 고려한 안테나 설계와 손 부착 시 HAC 지수의 관찰)

  • Kahng, Sungtek;Choi, Dong-Geun;Jeon, Jinsu;Park, Jeong-Hoon
    • Journal of Satellite, Information and Communications
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    • v.9 no.1
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    • pp.102-106
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    • 2014
  • In this paper, we investigate the realistic environment influence on the Hearing-Aid Compatibility(HAC) of the body-held device mock-up with a dual-band antenna. In detail, first, a dual-band internal antenna is designed considering the neighboring objects essential to a real attachable mobile device. This comes to reality by making its mock-up version. Second, the HAC of this device is simulated and measured for 'stand alone', and 'hand-held' cases. Particularly, the electromagnetic simulation of the designed antenna in the real device is verified by the standard measurement. Finally, the evaluated HAC is analyzed in terms of the relations with the bands, the mock-up environment and the hand effect.

A Design and Implementation of a Monopole Antena with Arrow and Ribbon-Shaped for the WLAN Application (WLAN 시스템에 적용 가능한 Arrow와 Ribbon 모양을 갖는 모노폴 안테나 설계 및 제작)

  • Mun, Seung-Min;Kim, Gi-Rae;Yoon, Joong-Han
    • The Journal of the Korea institute of electronic communication sciences
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    • v.10 no.7
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    • pp.763-768
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    • 2015
  • In this paper, a microstrip patch antenna with arrow and ribbon shape for WLAN was designed and manufactured. The antenna was designed on a FR-4 substrate that has a thickness of 0.8mm and a dielectric constant of 4.4. The substrate size is $50{\times}40mm^2$. A commercially available tool was used for simulation to get the optimized parameters and the optimized values were obtained by finding the parameters that act sensitively to the performance of the antenna. The proposed antenna was produced using the optimized values, and characteristics of return loss, gain and radiation pattern in WLAN bands were measured.

A study on branch type Inverted-F structure antenna with dual-band operation (듀얼밴드를 갖는 브랜치타입 인버티드 F구조 안테나에 관한 연구)

  • Park, Seong-Il;Ji, Yu-Kang
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.12 no.1
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    • pp.39-45
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    • 2008
  • In this parer a branch type inverted-F structure antenna with dual-band is proposed. The proposed antenna has a size of about $70mm{\times}35mm{\times}0.8mm$ with a total mobile phone PCB for support and patch of about $12mm{\times}8mm{\times}0.8mm$. This antenna is designed to operate of frequency 2.45GHz and 5.8GHz, Bandwidth at each other frequency is satisfied $83MHz{\sim}100MHz$ in frequencies. Also, The designed and fabricated dual-band antenna for 2.45GHz, 5.8GHz have a gain between 2.0dBi and -1.0dBi at all bands.

Design of a Dual-Band On-Body Antenna for a Wireless Medical Repeater System (의료용 무선 중계 시스템용 이중 대역 인체 부착형 안테나 설계)

  • Kwon, Kyeol;Tak, Jinpil;Choi, Jaehoon
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.24 no.3
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    • pp.239-246
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    • 2013
  • In this paper, a dual-band on-body antenna operating at MICS and ISM band for a wireless medical repeater system is proposed and the antenna performance including the human body effect is investigated. The designed dual-band antenna is comprised of a top patch for ISM band and bottom patch for MICS band. Simulation and measurement was carried out in order to analyze the effects of human body on antenna performance considering real use. The proposed antenna has required impedance bandwidth enough to cover both MICS and ISM bands. The measured peak gains were -12.47 dBi and 1.71 dBi at the each center frequency of MICS and ISM bands, respectively. Furthermore, the antenna has the maximum radiation directed toward the inside of the human body in the MICS band and directed toward the outside in the ISM band. In addition, the return loss property of the antenna is insensitive to human body effects so that the proposed antenna is well suited for the on-body wireless medical repeater system.

Impact and Bending Characteristics of Dual Band Composite Antennas (복합 구조 이중대역 안테나의 충격 및 굽힘 특성)

  • Shin, Dong-Sik;Kim, Jin-Yul;Park, Wee-Sang;Hwang, Woon-Bong
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.11 no.2
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    • pp.35-40
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    • 2011
  • We have studied the impact and bending characteristics of a dual band antenna (1.575, 2.645 GHz) with composite sandwich construction. Mechanical performance of the antenna can be improved by reinforcing the antenna by sandwiching the planar antenna with layers of carbon fiber-reinforced plastic(CFRP) and glass fiber-reinforced plastic(GFRP) using an adhesive film. According to the ASTM D7137, ASTM C393 and MIL-STD401B, impact and bending test were performed and the S-parameters and gains of the antenna were measured in order to verify electrical and mechanical performance. The maximum contact load and the bending load of the antenna are 4 kN and 400 N and gains of the antenna are 6 dBi and 4.6 dBi in the GPS and DMB bands, respectively. The proposed antenna structure can be applied to surfaces of vehicles.

Compact Dual-band Slot Antenna With Bent Slots (접힌 슬롯이 추가된 소형 이중 대역 슬롯 안테나)

  • Baek, Woon-Seok
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.20 no.6
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    • pp.1049-1056
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    • 2016
  • In this paper, a design method for a compact dual-band slot antenna with bent slot is studied. Bent slots are added on the rectangular slot of the proposed antenna for dual-band operation. The rectangular slot is fed by a coaxial cable by placing a rectangular feeding patch inside the slot. When the bent slots are added onto the both corner of the upper side of the rectangular slot symmetrically, a new resonant frequency is created in low frequency because of the increasement of the slot length. A prototype of the proposed dual-band slot antenna operating at 2.45 GHz WLAN band and 4.50-8.30 GHz band including 5GHz WLAN band is fabricated on an FR4 substrate with a dimension of 30 mm by 30 mm. Experiment results show that the antenna has a desired impedance characteristic with a frequency band of 2.40-2.49 GHz and 4.33-9.85 GHz for an input reflection coefficient < -10 dB.

Compact Dual-Band Ground Radiation Antenna Using Controlled Endless Metal-Rim Modes for WLAN Application (메탈 림 특성 모드를 활용한 WLAN 대역 초소형 이중 대역 그라운드 방사 안테나)

  • Jeon, Ji-hwan;Kim, Hyeong-dong
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.30 no.5
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    • pp.333-338
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    • 2019
  • In this study, we introduce a dual-band ground radiation antenna using an endless metal-rim mode control method that operates in the WLAN band. In the proposed antenna, the metal-rim modes are excited as one- and two-wavelength-mode radiators by a dual-band ground radiation antenna, which occupies a small space on the ground plane. The metal rim surrounds the ground plane with a gap of only 2 mm. In addition, two capacitors are inserted between the ground plane and the endless metal rim to control the one- and two-wavelength modes of the endless metal rim. Based on simulation and measurement results, we noted that the proposed antenna has an impressively high radiation performance.

Dual-band reconfigurable monopole antenna using a PIN diode (PIN 다이오드를 이용한 WLAN용 재구성 모노폴 안테나)

  • Mun, Seung-Min;Yoong, Joong-Han;Kim, Gi-Re
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.20 no.9
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    • pp.1633-1640
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    • 2016
  • In this paper, we propose a open-ended rectangular microstirp patch antenna with fork-shaped feeding structure. This antenna extends the effective bandwidth by transforming single or multi resonant frequency and is designed planar monopole structure with microstrip line to satisfy the WLAN bands (2.4 - 2.484, 5.15 - 5.35, 5.25-5.825 GHz). The substrate is printed in 0.8 mm thickness on an FR-4 board. A commercial 3D simulation tool was used to analyze surface current and electromagnetic field distribution in order to analyze the operation mode and reconfiguration principle of antenna. According to the lengths of individual patches, simulated reflection loss was compared to obtain optimized values. When it was designed with the optimized values, it satisfied WLAN bands (2.380 - 2.710, 4.900 - 5.950 GHz), if the switch is off, and 2.4 WLAN band (2.380 - 2.710 GHz). From the fabricated and measured results, measured results of return loss, gain and radiation patterns characteristics displayed for operating bands.