Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Standing Waves in a Cavity

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

Frequency-dependent Selection

Frequency-dependent Selection

When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.

You might also read

Related Articles

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

Sort by

Same author

Dimension-controlled formation of crease patterns on soft solids.

Soft matter·2016

Same author

Modeling Day-to-day Flow Dynamics on Degradable Transport Network.

PloS one·2016

Same author

Tetramethylpyrazine Protects Against Glucocorticoid-Induced Apoptosis by Promoting Autophagy in Mesenchymal Stem Cells and Improves Bone Mass in Glucocorticoid-Induced Osteoporosis Rats.

Stem cells and development·2016

Same author

Corrigendum: Lithium-ion-based solid electrolyte tuning of the carrier density in graphene.

Scientific reports·2016

Same author

PTEN/PI3K/AKT protein expression is related to clinicopathological features and prognosis in breast cancer with axillary lymph node metastases.

Human pathology·2016

Same author

Comparing the Diagnostic Accuracy of RTE and SWE in Differentiating Malignant Thyroid Nodules from Benign Ones: a Meta-Analysis.

Cellular physiology and biochemistry : international journal of experimental cellular physiology, biochemistry, and pharmacology·2016

Same journal

Peripheral B-cell receptor repertoire predicts immune-related adverse events following immune checkpoint inhibitor therapy in advanced renal cell carcinoma.

Scientific reports·2026

Same journal

Effects of black soldier fly (Hermetia illucens L.) larvae zoocompost on the mineral element content of blue honeysuckle berries.

Scientific reports·2026

Same journal

Investigation on absorption refrigeration performance of R1243zf with imidazolium ionic liquid as the working pairs.

Scientific reports·2026

Same journal

DeepTriage-CN: integrating clinical text with vital signs for emergency department admission prediction in an aging population.

Scientific reports·2026

Same journal

Gold nanoparticles as dual-action antiviral agents: disruption of SARS-CoV-2 viral envelopes and RNA integrity.

Scientific reports·2026

Same journal

Comparison of capillary microsampling and venous blood for multi-pathogen serosurveillance.

Scientific reports·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Mar 6, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

Flexible frequency selective metamaterials for microwave applications.

Bo Gao¹, Matthew M F Yuen¹, Terry Tao Ye²

¹Department of Mechanical Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.

Scientific Reports

|March 22, 2017

Summary

This summary is machine-generated.

Researchers developed a thin, flexible metamaterial using ferrite materials for sub-Gigahertz microwave applications. This innovation enables smaller, more adaptable electromagnetic devices like cloaks and absorbers.

More Related Videos

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Published on: June 28, 2024

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Related Experiment Videos

Last Updated: Mar 6, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Published on: June 28, 2024

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Area of Science:

Materials Science
Electromagnetics
Applied Physics

Background:

Metamaterials are engineered structures for controlling electromagnetic waves.
Traditional metamaterials are bulky and limited to higher frequencies (above Gigahertz).
There is a need for flexible, miniaturized metamaterials for broader microwave applications.

Purpose of the Study:

To develop a thin and flexible metamaterial structure.
To incorporate ferrite materials for miniaturization and flexibility.
To enable sub-Gigahertz microwave applications.

Main Methods:

Designed and developed a flexible metamaterial structure with small-scale unit cells.
Incorporated ferrite materials to reduce unit cell size and thickness.
Conducted simulations and experimental measurements to validate performance.

Main Results:

Achieved a metamaterial thickness of only 0.3mm.
Ferrite film with a permeability of 10 effectively reduced the resonant frequency.
Demonstrated the potential for flexible metamaterials in various microwave applications.

Conclusions:

The developed flexible ferrite-loaded metamaterials are suitable for sub-Gigahertz microwave applications.
These metamaterials offer enhanced flexibility and miniaturization compared to traditional designs.
Potential applications include cloaks, absorbers, and frequency selective surfaces.