Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Reducing Line Loss01:18

Reducing Line Loss

144
In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss...
144
Series Resonance01:17

Series Resonance

151
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...
151
Equivalent Circuits for Practical Transformers01:28

Equivalent Circuits for Practical Transformers

396
The practical equivalent circuits of single-phase two-winding transformers exhibit significant deviations from their idealized versions due to the inherent properties of winding resistance and finite core permeability. These properties result in real and reactive power losses, affecting the transformer's performance. Understanding these deviations is crucial for designing more efficient transformers.
In a practical transformer, each winding exhibits resistance and leakage reactance. The...
396
Transformers in Distribution System01:27

Transformers in Distribution System

98
Transformers in distribution systems can be broadly categorized into distribution substation transformers and other distribution transformers. They are crucial for stepping down high transmission voltages to levels suitable for distribution and end-user applications.
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
98
Transformers01:26

Transformers

1.1K
A device that transforms voltages from one value to another using induction is called a transformer. A transformer consists of two separate coils, or windings, wrapped around the same soft iron core. However, they are electrically insulated from each other.
The iron core has a substantial relative permeability. Therefore, the magnetic field lines generated due to the current in one winding are almost entirely confined within the core, such that the same magnetic flux permeates each turn of both...
1.1K
Characteristics of Series Resonant Circuit01:24

Characteristics of Series Resonant Circuit

225
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:
225

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Risk factors and prediction model for early pregnancy loss in polycystic ovary syndrome - development and validation: A retrospective and observational study.

Medicine·2026
Same author

Mitochondrial OXPHOS integrates immunometabolic cascade for bone regeneration via coupled ATP production and ROS homeostasis.

Redox biology·2026
Same author

Probiotic potential of <i>Lactiplantibacillus plantarum</i> LBK from Koumiss in reducing hyperuricemia through gut microbiota modulation.

Frontiers in microbiology·2026
Same author

A pig model of human radiation-induced veno-occlusive liver disease reveals ferroptosis as a therapeutic target.

Cell reports. Medicine·2026
Same author

Accurate Industrial Anomaly Detection and Localization Using Weakly-Supervised Residual Transformers.

IEEE transactions on image processing : a publication of the IEEE Signal Processing Society·2026
Same author

A rapid and visual detection for canine Adenovirus-2 using CRISPR-Cas13a-based SHERLOCK technology.

Journal of microbiological methods·2025

Related Experiment Video

Updated: Jun 6, 2025

Fabrication and Characterization of Superconducting Resonators
10:26

Fabrication and Characterization of Superconducting Resonators

Published on: May 21, 2016

11.3K

Isolation Transformer Based Very Low Frequency Antenna with Enhanced Radiation Characteristics.

Jingqi Wu1, Zilun Zeng1, Liwei Wang1

  • 1State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, P. R. China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|November 28, 2024
PubMed
Summary

A novel isolation transformer-based loop antenna enhances very low frequency (VLF) wave transmission. This compact VLF antenna design significantly boosts radiation intensity for reliable long-distance communication in challenging environments.

Keywords:
impedance matchinglow frequency antennasminiaturizationradiation enhancement

More Related Videos

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
13:44

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

15.3K
Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
15:25

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

6.1K

Related Experiment Videos

Last Updated: Jun 6, 2025

Fabrication and Characterization of Superconducting Resonators
10:26

Fabrication and Characterization of Superconducting Resonators

Published on: May 21, 2016

11.3K
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
13:44

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

15.3K
Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
15:25

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

6.1K

Area of Science:

  • Electromagnetics
  • Antenna Engineering
  • Materials Science

Background:

  • Very low frequency (VLF) electromagnetic waves offer superior propagation in challenging environments compared to high-frequency waves.
  • Traditional VLF antennas face limitations in size, efficiency, and power handling capabilities.
  • Effective VLF communication is crucial for applications like underground and underwater data transmission.

Purpose of the Study:

  • To propose a compact, efficient, and high-performance VLF loop antenna design.
  • To overcome the size, efficiency, and power limitations of conventional VLF antennas.
  • To enhance the radiation characteristics of VLF antennas for long-distance communication.

Main Methods:

  • Design and implementation of a VLF loop antenna incorporating an isolation transformer.
  • Utilization of a high magnetic permeability amorphous/nanocrystalline alloy (Fe73.5Cu1Nb3B9Si13.5) within the isolation transformer.
  • Experimental validation of antenna performance, including impedance matching and radiation intensity measurements.

Main Results:

  • The proposed antenna achieves compact size with well-matched impedance.
  • The isolation transformer enables stable high-current input, enhancing electromagnetic performance.
  • Radiation intensity increased over 30 times compared to traditional loop antennas.
  • Experimental transmission distance exceeded 340 m at 15 kHz with a 2 m diameter antenna.

Conclusions:

  • The isolation transformer-based VLF loop antenna offers significantly improved radiation characteristics.
  • The design demonstrates high radiation efficiency, low power consumption, and long-distance transmission capabilities.
  • This antenna technology holds substantial promise for underground and underwater communication systems.