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Parallel Resonance01:23

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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:
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Characteristics of Series Resonant Circuit01:24

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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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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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A compact multiband planar antenna using modified L-shape resonator slots.

Indu Jiji Rajmohan1, Mousa I Hussein1

  • 1Dept. of Electrical Engineering, UAE University, Al Ain, United Arab Emirates.

Heliyon
|October 29, 2020
PubMed
Summary
This summary is machine-generated.

This study presents a compact multiband planar antenna with resonator slots. The novel design achieves good performance for wireless communications, offering multiband capabilities in a miniature size.

Keywords:
Communication systemElectrical engineeringElectrical systemMultibandPatch antennaResonatorsWireless network

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Area of Science:

  • Electrical Engineering
  • Electromagnetics
  • Antenna Theory

Background:

  • Planar antennas are crucial for modern wireless communication systems.
  • Achieving multiband operation in compact antenna designs presents significant challenges.
  • Resonator slots offer a method for enhancing antenna performance and frequency selectivity.

Purpose of the Study:

  • To design and propose a novel multiband planar antenna.
  • To investigate the use of resonator slots for achieving multiband characteristics.
  • To evaluate the antenna's performance for wireless communication applications.

Main Methods:

  • A hexagonal planar patch antenna was designed with two pairs of modified mirror-imaged L-shaped resonator slots.
  • The antenna was fabricated using Isola FR408 substrate with specific dielectric properties.
  • Simulations and measurements were performed to validate the antenna's characteristics.

Main Results:

  • The proposed antenna demonstrated good impedance matching and radiation characteristics across multiband frequencies.
  • Simulated and measured reflection coefficients showed good agreement.
  • Measured peak gains ranged from 2 dB to 5 dB, with efficiencies between 40% and 80%.

Conclusions:

  • The compact multiband planar antenna with resonator slots meets the requirements for wireless communications.
  • The single-feed structure and miniature size offer advantages over existing antenna designs.
  • Stable directional radiation patterns indicate suitability for various wireless applications.