• Title/Summary/Keyword: Ground Plane

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EMI Analysis on Microstrip Line with Defected Ground plane (결함구조를 갖는 접지면을 고려한 마이크로 스트립 선로의 EMI 분석)

  • Oh Sang-Bae;Kim Hyeong-Seok;Choi Kyoung
    • 한국정보통신설비학회:학술대회논문집
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    • 2006.08a
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    • pp.158-161
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    • 2006
  • In this paper, we deal with EMI Analysis on Microstrip with Defected Ground plane. Specially, we investigate reflection, transmission, crosstalk, radiated emission on Microstrip with Defected Ground plane structure. And investigates undesired effects on various defected ground plane such as ground with split, slot, short end and open end gap. To analyze reflection, transmission and crosstalk of microstrip with defected ground plane, we used concept of the microstrip to slot line transition model. Besides, investigate radiated emission using FDTD Commercial tools such as CST MW

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Analysis of SMPS Characteristics applying Ground Plane Layer (Ground Plane레이어를 적용한 SMPS 특성분석)

  • Park, Jin-Hong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.15 no.1
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    • pp.436-440
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    • 2014
  • To verity the effect of PCB plane layer to the output characteristics of the Switched Mode Power Supply (SMPS), this paper compared with a generic one-layer PCB and a double-side PCB. This paper specially focused on the voltage, the current and the high frequency noise of the output characteristic of the SMPS, using a double-side PCB which has same layout and was installed a ground plane on the opposite side. This double-side PCB was assembled by all same components which used on the SMPS using the single-side PCB. The experiment results show the SMPS using the ground plan PCB can efficiently reduce the high frequency noise to 50mV at 100MHz from 150mV in the single-side PCB. And the results also show the high harmonics frequency was reduced as well.

Design of Improved U-Slotted Patch Antennas with EBG Ground Plane (EBG(Electromagnetic Band-Gap) 접지면을 갖는 개선된 U-Slotted 패치 안테나의 설계)

  • Park, Jong-Hwan;Lim, Seong-Bin;Choi, Hak-Keun
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.19 no.3
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    • pp.304-310
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    • 2008
  • Generally U-slotted patch antenna with PEC(Perfect Electric Conductor) ground plane is used for mobile telecommunication. However the improvement of the bandwidth is required to enlarge the capability of mobile telecommunication, In this paper, U-slotted patch antenna with EBG(Electromagnetic Band-Gap) ground plane is proposed to enlarge thr bandwidth and its radiation characteristics are investigated. To conform the bandwidth improvement, two kinds of U-slotted patch antennas with EBG and PEC ground plane are designed, fabricated, and radiation characteristics are measured. It is shown that the proposed antenna is wider than U-slotted patch antenna with PEC ground plane in bandwidth.

Antenna Factors of Half-wave Resonance Dipole Antennas above the Ground Plane (접지판 위에 놓여진 반파장 공진다이폴 안테나의 안테나 인자)

  • Ki-Chai Kim
    • The Proceeding of the Korean Institute of Electromagnetic Engineering and Science
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    • v.2 no.4
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    • pp.3-9
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    • 1991
  • This paper presents the characteristics of antenna factors of half-wave resonance dipole antennas above a ground plane. The current distributions on a horizontal and vertical dipole antennas were analyzed by the Galerkin's method of moments, and these solutions are used for calculating the horizontal and vertical antenna factors above the ground plane. It is shown that accurate antenna factors of the horizontal and vertical dipole above the ground plane are required of the radiated emission test.

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Ground Radiation Antenna for Mobile Devices Using Controlled Endless Metal Rim Mode

  • Jeon, Jihwan;Qu, Longyue;Lee, Hongkoo;Kim, Hyeongdong
    • ETRI Journal
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    • v.40 no.2
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    • pp.180-187
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    • 2018
  • In this paper, we introduce a ground radiation antenna that uses controlled endless metal rim modes. In the proposed technique, the metal rim mode is tuned and excited as a one-wavelength radiator by a small ground radiation antenna. The proposed antenna occupies a clearance of $1mm{\times}4mm$ in a $30mm{\times}20mm$ ground plane. A metal rim with dimensions of $34mm{\times}24mm$ surrounds the ground plane, and the metal rim is separated from the ground plane by a gap of 2 mm. In addition, a lumped capacitor is inserted between the metal rim and the ground plane to control the characteristic mode of the metal rim such that the resonance of the metal rim is tuned to be equal to the operating frequency. By performing simulations and measurements, we compare the performance of the proposed antenna with that of a reference antenna that does not have an inserted capacitor between the metal rim and the ground plane. The results show that a significant improvement of the radiation performance is obtained by employing the proposed technique.

Front-to-Back Ratio Improvement of a Microstrip Patch Antenna Loaded with Soft Surface Structure in a Partially Removed Ground Plane

  • Lee, Hong-Min
    • Journal of electromagnetic engineering and science
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    • v.12 no.4
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    • pp.247-253
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    • 2012
  • This study presents a new, simple method for improving the front-to-back (F/B) ratio of a microstrip patch antenna. The back radiation of the microstrip patch antenna is reduced by removing some metallic parts around the ground plane and placing a new soft-surface configuration, consisting of an array of stand-up split-ring resonators on a bare dielectric substrate near the two ground plane edges. Compared to the F/B ratio of a conventional microstrip patch antenna with a full ground plane of the same size, our proposed microstrip patch antenna experimentally achieves an improved F/B ratio of 9.6 dB.

Effect of Loading Split-Ring Resonators in a Microstrip Antenna Ground Plane

  • Lee, Hong-Min
    • Journal of electromagnetic engineering and science
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    • v.15 no.2
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    • pp.120-122
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    • 2015
  • This study presents a new, simple method for improving the front-to-back (F/B) ratio of a microstrip patch antenna (MSA) based on surface wave suppression. The back radiation of the MSA is significantly reduced by using the meandered ground plane edges and placing split-ring resonators (SRRs) in the middle of the meandered slots. By loading SRRs near the center of the meandered ground plane edges, some parts of the diffracted back-lobe power density can be reduced further. Compared to the F/B ratio of a conventional MSA with a full ground plane of the same size, an improved F/B ratio of 18 dB has been achieved experimentally for our proposed MSA.

A Study on Improving Impedance Characteristics of Planar Monopole Antenna with Vertical Ground Plane (수직 접지면을 갖는 평판형 모노폴 안테나의 임피던스 특성 개선에 관한 연구)

  • Jung, Jin-Woo;Lee, Hyeon-Jin;Lim, Yeong-Seog
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.48 no.5
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    • pp.54-63
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    • 2011
  • This paper presents the improving impedance charactersitics of a planar monopole antenna with a vertical ground plane. For improving impedance characteristics, we used the effect of a vertical ground plane. To analyze the effect of vertical ground plane, we proposed the dipole antenna mode. the impedance characteristics of planar monopole antenna are improved by correlation between monopole antenna and vertical ground plane, based on each operating mode. Our analysis indicates can improve the impedance characteristics of varying planae monopole antennas.

Simultaneous Switching Noise Model in Multi-Layered IC Package System with Ground Plane (그라운드 평면을 갖는 다층 구조 IC 패키지 시스템에서 동시 스위칭 노이즈 모델링)

  • 최진우;어영선
    • Proceedings of the IEEK Conference
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    • 1999.06a
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    • pp.389-392
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    • 1999
  • It is essential to estimate an effective inductance in a ground plane of muliti-layer IC package system in order to determine the simultaneous switching noise of the package. A new method to estimate the effective ground inductance in multi-layer IC package is presented. With the estimated ground plane inductance values, maximum switching noise variations according to the number of simultaneously switching drivers are investigated by developing a new SSN model. These results are verified by performing HSPICE simulation with the 0.35${\mu}{\textrm}{m}$ CMOS technology.

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Multiple Camera-Based Correspondence of Ground Foot for Human Motion Tracking (사람의 움직임 추적을 위한 다중 카메라 기반의 지면 위 발의 대응)

  • Seo, Dong-Wook;Chae, Hyun-Uk;Jo, Kang-Hyun
    • Journal of Institute of Control, Robotics and Systems
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    • v.14 no.8
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    • pp.848-855
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    • 2008
  • In this paper, we describe correspondence among multiple images taken by multiple cameras. The correspondence among multiple views is an interesting problem which often appears in the application like visual surveillance or gesture recognition system. We use the principal axis and the ground plane homography to estimate foot of human. The principal axis belongs to the subtracted silhouette-based region of human using subtraction of the predetermined multiple background models with current image which includes moving person. For the calculation of the ground plane homography, we use landmarks on the ground plane in 3D space. Thus the ground plane homography means the relation of two common points in different views. In the normal human being, the foot of human has an exactly same position in the 3D space and we represent it to the intersection in this paper. The intersection occurs when the principal axis in an image crosses to the transformed ground plane from other image. However the positions of the intersection are different depend on camera views. Therefore we construct the correspondence that means the relationship between the intersection in current image and the transformed intersection from other image by homography. Those correspondences should confirm within a short distance measuring in the top viewed plane. Thus, we track a person by these corresponding points on the ground plane. Experimental result shows the accuracy of the proposed algorithm has almost 90% of detecting person for tracking based on correspondence of intersections.