• Title/Summary/Keyword: 사각 링 선로

Search Result 13, Processing Time 0.025 seconds

Study on Frequency Characteristics of Rectangle Spiral Planar Inductor (사각 나선형 평면 인덕터의 주파수 특성에 관한 연구)

  • Kim, Jae-Wook
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.15 no.4
    • /
    • pp.2330-2334
    • /
    • 2014
  • In this study, we confirmed the frequency characteristics of planar spiral inductor based on non-contact method AC coupling for wireless signal transmission. The dielectric constant variation of the substrate does not directly effect the inductance of device but effect the electrostatic capacity of device. Therefore, its change self-resonance frequency. The thickness increment of the substrate increase inductance but decrease self-resonance frequency. Because, the thickness decrement of the substrate make the inside electrostatic capacity increment.

A Study on Characteristics of Microwave Transmission Line of Rectangular Split Ring Resonator (사각 분리형 링 공진기의 마이크로파 전송선로 특성 연구)

  • Kim, Girae
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
    • /
    • v.3 no.2
    • /
    • pp.25-30
    • /
    • 2010
  • In this paper, a novel notch resonator is proposed based on Rectanglar Split Ring Resonator (R-RSS) element. We represented the electrical characteristics for R-SRR elements coupled with microstrip line, and measured result is compared with electromagnetic simulation (HFSS) result. We also solved equivalent circuit for R-SRR element, and also discussed influences of change structural parameters of R-SRR. the size of R-SRR is the most important parameters for frequency tuning. Also we can make tunable resonator form the basic structure. This novel resonator can apply to design of tunable bandpass filter and voltage control oscillator.

  • PDF

A Compact 3-Layer EBG Structure with Square Ring Stripline (사각 링 스트립선로를 결합시킨 소형 3층 EBG 구조)

  • An Sung-Nam;Shin Dong-Gu;Kim Sang-ln;Choo Ho-Sung;Kim Moon-Il;Park Ikmo;Lim H.
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.16 no.3 s.94
    • /
    • pp.300-310
    • /
    • 2005
  • In this paper we propose the compact three-layer EBG structure. The unit cell of the proposed EBG structure is composed of a square patch in the upper layer and a square ring stripline in the lower layer that are connected to the ground plane through conducting vias. Reflection phase analysis method and tangential transmission method were considered to accomplish effective EM simulation and measurement. EM simulation results indicate that bandgap characteristics of the EBG structure using both methods is nearly identical. Parametric studies have been performed with the EM simulator to analyze the properties of the EBG structure by investigating the phase shift of the normally incident plane wave, and the transmission measurements between simple monopole antennas positioned near the EBGstructure have been done. The operating fiefuency bandgap of the proposed EBG structure is about 34 $\%$ lower than the conventional EBG structure with the same size. Measured results show bandgap from 0.930 GHz to 0.945 GHz.

A Design and Implementation of Multi-band Monopole Antenna for GPS/WiMAX/WLAN Applications (GPS/WiMAX/WLAN 시스템에 적용 가능한 다중밴드 모노폴 안테나의 설계와 제작)

  • Yoon, Joong-Han;Lee, Deok-Hwan
    • The Journal of the Korea institute of electronic communication sciences
    • /
    • v.10 no.10
    • /
    • pp.1189-1196
    • /
    • 2015
  • In this paper, a microstrip-fed multiband monopole antenna for GPS(Global positioning system)/WiMAX(:Worldwide interoperability for microwave access)/WLAN(Wireless Local Area Networks) for applications was designed, fabricated and measured. The proposed antenna is based on a microstrip-fed structure, and composed of two rectangular double rings and L strips pair and then designed in order to get triple band characteristics. To obtain the optimized parameters, we used the simulator, Ansoft's High Frequency Structure Simulator(HFSS). The proposed antenna is made of $27.0{\times}54.0{\times}1.0mm3$ and is fabricated on the permittivity 4.4 FR-4 substrate. The experiment results shown that the proposed antenna obtained the -10 dB impedance bandwidth 300 MHz (1.325~1.625 GHz), 400 MHz (2.275~2.675 GHz), and 600 MHz (3.15~3.75 GHz) covering the GPS/WiMAX/WLAN bands. Also, the proposed antenna measured gain and radiation patterns characteristics for required operating bands.

Design and SAR Analysis of Broadband Monopole Antenna Using Loop and T-Shaped Patches (사각 루프와 T자형 패치를 결합한 광대역 평면형 모노폴 안테나 설계 및 SAR 분석)

  • Jang, Ju-Dong;Lee, Seungwoo;Kim, Nam;Choi, Dong-Geun
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.24 no.1
    • /
    • pp.1-10
    • /
    • 2013
  • In this paper, a broadband planar monopole antenna for multi-band services is proposed. The physical size of the proposed antenna is miniaturized by folding a rectangular loop. And a resonance point in the 3.9 GHz band is reduced by a coupling phenomenon with the central part of the T-shaped patch and the folded rectangular loop. In addition, the T-shaped patch is inserted to the rectangular shaped monopole antenna due to deriving the broadband frequency characteristics. The frequency characteristic is optimized by adjusting the gap and length of the folded rectangular loops and a transverse diameter of the T-shaped patch. The antenna dimensions including the ground plane are $40{\times}60{\times}1.6mm^3$. It is fabricated on the FR-4 substrate(${\epsilon}_r$=4.4) using a microstrip line of $50{\Omega}$ for impedance matching. In the measured result, the bandwidth corresponding to the VSWR of 2:1 is 162 MHz(815~977 MHz) and 2,530 MHz(1.43~3.96 GHz). For analyzing the human effect by the proposed antenna, 1 g and 10 g averaged SARs are simulated and measured. As the simulated results, 1 g-averaged SAR is 1.044 W/kg, and 10 g-averaged SAR is 0.718 W/kg. This result are satisfied by the SAR guidelines which are 1.6 W/kg(1 g-averaged) and 2.0 W/kg(10 g-averaged).

Design and Manufacture of Modified Ring antenna with Stub and Ground Slot for WLAN Applications (WLAN 시스템에 적용 가능한 그라운드 슬롯과 stub를 갖는 변형된 링 안테나 설계와 제작)

  • Koo, Yung-Seo;Im, Dae-Soo
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.17 no.10
    • /
    • pp.2265-2272
    • /
    • 2013
  • In this paper, a dual-band circular ring monopole antenna with stub and ground slot for is proposed WLAN(Wireless Local Area Networks) applications. The proposed antenna is based on a planar monopole design, and composed of one circular ring of radiating patches, and modified feed line, and rectangular slot in the ground plane for dual-band operation. To obtain the optimized parameters, we used the simulator, Ansoft's High Frequency Structure Simulator(HFSS) and found the parameters that effect antenna characteristics. Using the obtained parameters, the antenna is fabricated, and the return loss coefficient, gain, and radiation patterns are determined for WLAN application.

Study on Frequency Characteristics of Hexagonal Spiral Thin-film Inductor (육각 나선형 박막 인덕터의 주파수 특성에 관한 연구)

  • Kim, Jae-Wook;Kim, Hee-Cheol
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
    • /
    • v.10 no.5
    • /
    • pp.402-408
    • /
    • 2017
  • In this paper, we analyzed the frequency characteristics of hexagonal spiral thin-film inductor based on non-contact AC coupling for wireless signal transmission. We compared and analyzed the frequency characteristics of the rectangular spiral inductor and the hexagonal spiral inductor according to the number of turns, the line width and the line spacing of the conductor. Hexagonal spiral inductor has more number of turns to has the same inductance as rectangular spiral inductor, but the overall length of the conductors is shortened. This reduces the self inductance and increases the mutual inductance so that the overall inductance can have the same value. Also, since the overall length of the conductor is shortened and the magnetic resistance is reduced, the quality factor and the self-resonant frequency performance can be secured. The proposed hexagonal spiral thin-film inductor has the inductance of 3.54nH at 2GHz, the quality factor of max 14.00 at 5.0GHz and the self-resonant frequency at about 11.3GHz.

Design and Manufacture of Modified Circular Ring antenna for WLAN/WiMAX Applications (WLAN/WiMAX 시스템에 적용 가능한 변형된 원형 링 안테나 설계와 제작)

  • Lim, Dae-Soo;Yoon, Joong-Han
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.18 no.2
    • /
    • pp.268-275
    • /
    • 2014
  • In this paper, a dual-band circular ring monopole antenna with stub and ground slot for WLAN(Wireless Local Area Networks)/WiMAX(World interoperability for Microwave Access) applications. The proposed antenna is based on a planar monopole design, and composed of one circular ring of radiating patch, cross strip in circular ring, modified feed line, and two rectangular slot in the ground plane for triple-band operation. To obtain the optimized parameters, we used the simulator, Ansoft's High Frequency Structure Simulator(HFSS) and found the parameters that greatly effect antenna characteristics. Using the obtained parameters, the antenna is fabricated. The numerical and experiment results demonstrated that the proposed antenna satisfied the -10 dB impedance bandwidth requirement while simultaneously covering the WLAN and WiMAX bands. And characteristics of gain and radiation patterns are determined for WLAN/WiMAX application.

Evaluation and Adjustment of Lateral Displacement of Complex-shaped RC Tall Buildings Considering the Displacement by Tilt Angle of Each Floor (층경사각에 의한 횡변위를 고려한 비정형 고층건물의 횡변위 평가/보정)

  • Kim, Yungon
    • Journal of the Korea Concrete Institute
    • /
    • v.27 no.5
    • /
    • pp.551-558
    • /
    • 2015
  • Lateral displacement in the most complex-shaped tall buildings is caused by eccentric gravity loads which are induced by the difference in location between a center of mass and a center of stiffness. The lateral displacements obtained from analysis, using conventional procedures, are prone to overestimate the actual values because much of realignment efforts made during construction phase are ignored. In construction sequence analysis, the self-leveling of slab and the verticality of columns/walls could be considered at each construction stage. Moreover, the displacement compensation can be achieved by manual process such as re-centering - locating to global coordinates through surveying. Because the lateral displacement increases with the building height, it is necessary to set up adjustment plan through construction stage analysis in advance in order to result in displacements less than the allowable limits. Because analytical solution includes lots of assumptions, the pre-adjusting displacement should be reasonably controlled with considerations for the uncertainty due to these assumptions.

A Study on Rectangular-Ring Patch Active Antenna with Dual Polarization Diversity (이중편파 다이버시티 특성을 갖는 사각 링 구조의 능동형 패치 안테나에 관한 연구)

  • Yun, Gi-Ho
    • Journal of IKEEE
    • /
    • v.13 no.3
    • /
    • pp.72-79
    • /
    • 2009
  • This paper describes a compact microstrip active antenna with dual polarization. The antenna, receiving both a left-hand circularly polarized wave and a right-hand circularly polarized wave, has a function of polarization diversity. A square-shaped empty room is located on the inside of the microstrip radiator so that the size has been reduced. And slots are added around feeding point to improve input matching. Also, amplifier and switching circuitry are placed at the empty room to increase antenna gain and to select one of the circular polarizations, respectively. The proposed antenna has been applied to GPS(global positioning system). The measurement results show that it has 10dB-impedance bandwidth, 3dB axial bandwidth of about 50MHz, 3dB beamwidth of 90degree, and gain of 13dBi, respectively, for RHCP. Also, it has 3dB axial bandwidth of about 50MHz, 3dB beamwidth of 84 degree, and gain of 12dBi, respectively, for LHCP.

  • PDF