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Related Concept Videos

Parallel Resonance01:23

Parallel Resonance

867
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
867
Design Example: Underdamped Parallel RLC Circuit01:17

Design Example: Underdamped Parallel RLC Circuit

822
Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
Starting with a fixed...
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Series Resonance01:17

Series Resonance

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The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...
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Characteristics of Series Resonant Circuit01:24

Characteristics of Series Resonant Circuit

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Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
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Sound Waves: Resonance01:14

Sound Waves: Resonance

2.8K
Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
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Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

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Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
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Related Experiment Video

Updated: May 6, 2026

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

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Note: Tunable overlapping half-ring resonator.

H Torun1, S Sadeghzadeh, A D Yalcinkaya

  • 1Department of Electrical and Electronics Engineering, Bogazici University, Bebek 34342, Istanbul, Turkey.

The Review of Scientific Instruments
|November 5, 2013
PubMed
Summary

A novel tunable microwave resonator using a magnetic actuator offers precise frequency control. This scalable design achieves a 38% tuning range with high quality factors, ideal for advanced microwave applications.

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Area of Science:

  • Microwave Engineering
  • Electromagnetics
  • Materials Science

Background:

  • Tunable microwave resonators are crucial components in modern electronic systems.
  • Existing designs often face limitations in tuning range, precision, or scalability.
  • Developing resonators with wide tuning ranges and high quality factors is an ongoing challenge.

Purpose of the Study:

  • To introduce and validate a unique tunable microwave resonator with a pair of half-rings.
  • To demonstrate precise control over the resonant frequency using a magnetic actuator.
  • To assess the scalability and performance characteristics of the proposed resonator design.

Main Methods:

  • Design and fabrication of a half-ring microwave resonator.
  • Utilizing a magnetic actuator to precisely control the capacitive gap for tunability.
  • Modeling resonator transmission characteristics using finite-element analysis.
  • Experimental measurement of transmission characteristics and quality factors.

Main Results:

  • The tunable microwave resonator demonstrated accurate frequency control via magnetic actuation.
  • A significant tuning range of 38% was achieved with a resolution of a few MHz.
  • Measured quality factors exceeded 2500, indicating sharp transmission dips.
  • The design geometry proved scalable for different electromagnetic spectrum bands.

Conclusions:

  • The introduced half-ring resonator offers a promising solution for tunable microwave applications.
  • Precise frequency control and a wide tuning range are key advantages of this design.
  • The resonator's scalability and high performance metrics make it suitable for diverse electromagnetic applications.