• Title/Summary/Keyword: coupling circuit

Search Result 473, Processing Time 0.025 seconds

An Equivalent Circuit Model for a Dumbbell-Shaped DGS Microstrip Line

  • Woo, Duk-Jae;Lee, Taek-Kyung
    • Journal of electromagnetic engineering and science
    • /
    • v.14 no.4
    • /
    • pp.415-418
    • /
    • 2014
  • This paper presents an equivalent circuit model for a dumbbell-shaped defected ground structure (DGS) in a microstrip line. The effects of equivalent circuit elements of a dumbbell-shaped DGS and their magnetic coupling to the host transmission line are modeled as a simple lumped-element circuit. In addition, simple approximate expressions to determine the main circuit parameters for this model are presented. The transfer characteristic calculated by the proposed circuit model is compared with the results of EM simulation and measurement.

Proposed Equivalent Circuit and Parameter Identification Method for Electro-Magnetic Resonance Based Wireless Power Transfer

  • Kawamura, Atsuo;Kim, Tae-Woong
    • Journal of Electrical Engineering and Technology
    • /
    • v.8 no.4
    • /
    • pp.799-807
    • /
    • 2013
  • The proper equivalent circuit is newly presented for electro-magnetic resonance based wireless power transfer. Based on the proposed equivalent circuit of open-ended helical antennas, the parameter identification of helical antennas can be well derived for highly efficient wireless power transfer. The well-established equivalent circuit in high frequency ranges is developed for analyzing a resonance enhanced-electromagnetic coupling helical antennas and the unknown parameters for helical antennas are identified by experiments. The effectiveness based on the proposed equivalent circuit is verified through experiments.

Silicon Substrate Coupling Modeling and Analysis including RF Package Inductance (RF 패키지 인덕턴스가 실리콘 기판 커플링에 미치는 영향 모델링 및 해석)

  • Jin, U-Jin;Eo, Yeong-Seon;Sim, Jong-Jin
    • Journal of the Institute of Electronics Engineers of Korea TC
    • /
    • v.39 no.1
    • /
    • pp.49-57
    • /
    • 2002
  • Including RF Package inductance, substrate coupling through conductive silicon(Si)-substrate is modeled and quantitatively characterized. 2-port substrate coupling model is extended for the characterization of multi-port substrate coupling between digital circuit block and analog/RF circuit block. Furthermore, scalable parameter extraction model is developed. Multi-port substrate coupling can be investigated by linearly superposing a frequency-dependent 2-port substrate coupling model using scalable parameters. In addition, Substrate coupling including RF package inductance effect is quantitatively investigated. It is shown that package effect increases substrate coupling and shifts a characteristic frequencies(i.e., poles) to the higher frequency range. The proposed methodology can be efficiently used to the mixed-signal circuit performance verification.

Analysis of Characteristics in Transformer by using Coupling Coefficient Type Equivalent Circuit (결합계수형 등가회로에 의한 변압기의 특성해석)

  • 이광직;김주홍
    • The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.9 no.4
    • /
    • pp.86-92
    • /
    • 1995
  • In the analysis of characteristic behaviors of a real transformer with coupling coefficient K is less than 1, this paper presents the more accurate and practical profits than the traditional analysis of the transformer treated as K∼1. This results from the use of the coupling coefficient type equivalent circuit of the transformer which includes K as positive parameter. Furthermore, a leakage transformer is analyzed in a unified method and the results of analysis are consistent with the practical measurements of the transformer. By using the above equivalent circuit, the characteristics referred to the load side are expressed as Thevenin voltage source and the leakage inductor (1-K2)L2. Therefore, these analysis about the output voltage and the damping factor in the transient state which are affected by the leakage inductor are confirmed to be an effective method.

  • PDF

Equivelent Circuit of Leakage Transformer using coupling Coefficient K (종합계수 K에 의한 누설변압기의 등가회로)

  • 이광직;공휘식;김주홍
    • The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.6 no.3
    • /
    • pp.50-56
    • /
    • 1992
  • The coupling coefficient K controls the characteristic behaviors of leakage transformer. The value of coupling coefficient K was obtained from th leakage flux of leakage transformer an ascertained from the variation due to the function of current. Therefore, this paper presented the equivalent circuit of leakage transformer consisting of Thevenin's constant voltage source and inductor as (1-K2)L2 which were proportional to parameter K. The proposed equivalent circuit verified the validity in designing the leakage transformer because it was in good agreements of the behaviors of ideal transformer (K is 1), leakage transformer (K is 0$\leq$K$\leq$1), inductor (K is 0).

  • PDF

Design of Crosstalk Compensation Circuit in TFT-LCDs (박막트랜지스터 액정표시소자의 화소간섭 보상회로설계)

  • 정윤철;박종철;김이섭
    • Journal of the Korean Institute of Telematics and Electronics B
    • /
    • v.32B no.11
    • /
    • pp.1374-1382
    • /
    • 1995
  • In TFT-LCDs, as the display size area becomes larger, and the resolution higher, we have to consider the image degradation effects due to the incorporation of the TFT-LCD parameters such as the data-line resistance, the common electrode resistance, the data-line to common parasitic capacitance, and the output characteristics of driver ICs. One of the degradation effects is crosstalk resulting from the coupling between the source bus-line and common electrode. Since a source signal which represents a large number of display data is supposed to vary frequently, the common signal level is affected through the coupling effect, resulting in the degradation of nearby pixel drive signals. Therefore, we proposed a method to compensate for this source-common electrode coupling effect, we also designed and experimented the feasibility of our crosstalk compensation circuit in the actual TFT-LCD. We saw that the newly designed compensation circuit greatly reduced the crosstalk in display pattern image.

  • PDF

UTILIZING COUPLING STRATEGY TO GENERATE A NEW SIMPLE 7D HYPERCHAOTIC SYSTEM AND ITS CIRCUIT APPLICATION

  • Saad Fawzi Al-Azzawi
    • Communications of the Korean Mathematical Society
    • /
    • v.39 no.2
    • /
    • pp.547-562
    • /
    • 2024
  • By utilizing coupling the strategy in the 5D Sprott B system, a new no equilibrium 7D hyperchaotic system is introduced. Despite the proposed system being simple with twelve-term, including solely two cross product nonlinearities, it displays extremely rich dynamical features such as hidden attractors and the dissipative and conservative nature. Besides, this system has largest Kaplan-Yorke dimension compared with to the work available in the literature. The dynamical properties are fully investigated via Matlab 2021 software from several aspects of phase portraits, Lyapunov exponents, Kaplan-Yorke dimension, offset boosting and so on. Moreover, the corresponding circuit is done through Multisim 14.2 software and preform to verify the new 7D system. The numerical simulations wit carryout via both software are agreement which indicates the efficiency of the proposed system.

Analysis of Coupling Between Digital Noise and Portable Smart Terminal Antenna According to Antenna Types (휴대용 스마트 단말기 안테나 타입에 따른 디지털 노이즈와 안테나의 결합 분석)

  • Kim, Joonchul
    • Journal of IKEEE
    • /
    • v.23 no.3
    • /
    • pp.873-877
    • /
    • 2019
  • In this paper, we analyze the degree of digital noise coupling for Inverted F Antenna (IFA) and Loop Antenna, which are representative types of portable terminal antenna, using characteristic mode. Firstly, the degree of coupling according to the direction of digital signal lines and characteristic mode current of the printed circuit board (PCB) including the antenna is compared and analyzed, and based on this result, the coupling between WiFi antenna and the front camera noise is analyzed. For analysis, the digital signal line and ground line of the FPCB of the camera module are modeled as a loop feeder that excites the characteristic mode of the PCB ground and the change of noise coupling according to the antenna types are analyzed.

Circuit Model Analysis for Traces that Cross a DGS

  • Jung, Kibum;Lee, Jongkyung;Chung, Yeon-Choon;Choi, Jae-Hoon
    • Journal of electromagnetic engineering and science
    • /
    • v.12 no.4
    • /
    • pp.240-246
    • /
    • 2012
  • This paper presents a novel modeling technique for traces that cross a defected ground structure. A simple and accurate equivalent circuit model provides clear insight into the coupling mechanism between a microstrip line and a slot or split. The circuit models consist of a transformer as the coupling mechanism and LC resonators as the ground with a slot or split structure. Resistors, capacitors, and inductors are added to the model to increase accuracy and equivalence at high frequency. Simulated and measured S-parameters are presented for defected ground structures. The accuracy and validity of the proposed equivalent circuit model is verified by evaluation of the S-parameter characteristics of the defected ground structures and comparison with measured results.

SIP based Tunable BPF for UHF TV Tuner Applications (UHF대역 TV 튜너에 적용을 위한 가변형 대역통과필터)

  • Lee, Tae-C.;Park, Jae-Y.
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.57 no.11
    • /
    • pp.2127-2130
    • /
    • 2008
  • In this paper, a tunable bandpass filter with mutual inductive coupling circuits is newly designed and demonstrated for UHF TV tuner ranged from Ch.14(473MHz) to Ch.69(803MHz) applications. Conventional HF tuning circuit with an electromagnetic bandpass filter has several problems such as large size, high volume and high cost, since the electromagnetic filter is comprised of several passive components and air core inductors to be assembled and controlled manually. To address these obstacles, peaking chip inductor was newly applied for constructing the mutual inductive coupling circuit. The proposed circuit was newly and optimally designed, since the chip inductor showed lower components Q-value than the air core inductor. A varactor diode has been also used to fabricate the proposed tunable bandpass filter for RF tuning circuit. The fabricated tunable filter exhibited low insertion loss of approximately -3dB, high return loss of below -10dB, and large tuning bandwidth of 330MHz.