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Related Concept Videos

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Series Impedances: Three-Phase Line

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Calculating series impedances for a three-phase overhead line involves evaluating resistances and inductive reactances in a network with three-phase and multiple neutral conductors grounded at regular intervals.
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Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
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Coordinating time-delay overcurrent relays in complex radial systems and directional overcurrent relays in multi-source transmission loops can be challenging. Impedance relays address these issues by responding to the voltage-to-current ratio, specifically measuring the apparent impedance of a line. These relays become more sensitive during faults as current increases and voltage decreases, thereby reducing the apparent impedance.
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Impedance Combination01:21

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Consider a string of christmas lights, each bulb symbolizing an impedance element. In this series configuration, the flow of electric current remains uniform across every component. This behavior aligns with Kirchhoff's Voltage Law (KVL), which asserts that the total impedance in such a setup equals the sum of individual impedances—akin to resistors in series. It follows that the voltage from the power source is distributed proportionally among these components, adhering to the...
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In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
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Related Experiment Video

Updated: Jun 23, 2025

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
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Compact Ultra-Wideband Wilkinson Power Divider in Parallel Stripline with Modified Isolation Branches.

Dong-Jae Go1, Byung-Cheol Min1, Mun-Ju Kim1

  • 1School of Electronic and Electrical Engineering, Kyungpook National University, Daegu 41566, Republic of Korea.

Sensors (Basel, Switzerland)
|June 19, 2024
PubMed
Summary
This summary is machine-generated.

A new design method for a compact ultra-wideband Wilkinson power divider (PD) in parallel stripline (PSL) significantly enhances frequency bandwidth. This modified design uses added capacitors in isolation branches, achieving a 139.5% bandwidth and reduced size.

Keywords:
isolation branchoptimization algorithmparallel striplinepower divider/combinerultra-wideband

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Area of Science:

  • Electrical Engineering
  • Electromagnetics
  • Microwave Engineering

Background:

  • Wilkinson power dividers are crucial for signal distribution in RF and microwave systems.
  • Traditional designs often face limitations in bandwidth and size, hindering performance in modern applications.
  • Parallel stripline (PSL) technology offers potential for miniaturization and improved performance.

Purpose of the Study:

  • To propose an efficient design methodology for a compact and ultra-wideband multi-stage Wilkinson power divider (PD) utilizing parallel stripline (PSL) technology.
  • To enhance the operational frequency bandwidth and reduce the physical dimensions of the PD.
  • To develop a systematic design approach enabling precise parameter determination.

Main Methods:

  • Modification of the isolation branch by incorporating capacitors to broaden bandwidth and reduce size.
  • Equivalency modeling of the PSL power divider to two microstrip power dividers for simplified design.
  • Derivation of design equations and utilization of an in-house algorithm for optimal parameter selection (line impedance, resistance, capacitance).
  • Design and verification of a three-stage PSL PD at a 5 GHz base frequency using 3D electromagnetic (EM) simulations and experimental measurements.

Main Results:

  • The proposed three-stage PSL Wilkinson power divider achieved an ultra-wideband frequency range from 1.16 to 6.51 GHz, representing a 139.5% bandwidth.
  • A significant size reduction was achieved, with a 23% shorter transmission line length (207°) compared to conventional designs.
  • The designed divider exhibited a low insertion loss between 0.7 to 1.4 dB.
  • 3D EM simulations and measurement results showed excellent agreement, validating the proposed design procedure.

Conclusions:

  • The proposed design method offers an effective approach for creating compact and ultra-wideband multi-stage Wilkinson power dividers in PSL.
  • The integration of capacitors in the isolation branches is a key factor in achieving enhanced bandwidth and miniaturization.
  • The derived design equations and algorithm provide a reliable tool for optimizing PSL power divider parameters for specific applications.