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

Mesh Analysis for AC Circuits

Mesh Analysis for AC Circuits

In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...

Design Example: Capacitance Multiplier Circuit

Design Example: Capacitance Multiplier Circuit

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.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.

You might also read

Related Articles

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

Sort by

Same author

UNICORN for Native Transcatheter Aortic Valve Replacement in a Bicuspid Aortic Valve.

JACC. Cardiovascular interventions·2026

Same author

Screen Failure in Transcatheter Tricuspid Valve Intervention: A Call for Timely Referral and Comprehensive Care Pathways.

The Canadian journal of cardiology·2026

Same author

A Bleeding Risk Score for Cancer-Associated Venous Thromboembolism in Patients Receiving Direct Oral Anticoagulants.

JACC. CardioOncology·2026

Same author

Efficacy and safety of low-dose triamcinolone acetonide injections in reducing stricture at stapled hemorrhoidopexy sites.

Annals of coloproctology·2026

Same author

Pulmonary Artery Pulsatility Index and Clinical Outcomes in Patients Undergoing Transcatheter Tricuspid Valve Replacement.

JACC. Cardiovascular interventions·2026

Same author

Re-Exploration for Postoperative Bleeding in Heart Transplantation: Outcomes and Predictors From the Korean Organ Transplantation Registry.

Korean circulation journal·2026

Search research articles

Related Experiment Video

Updated: Nov 15, 2025

Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics

Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics

Published on: May 28, 2016

Design Optimization of Reconfigurable Liquid Crystal Patch Antenna.

Dowon Kim¹, Kitae Kim², Hogyeong Kim¹

¹Department of Electrical, Electronics & Communication Engineering Education, Chungnam National University, Daejeon 34134, Korea.

Materials (Basel, Switzerland)

|March 6, 2021

Summary

This study proposes a novel smart antenna using liquid crystals for tunable frequency. The design minimizes liquid crystal use while maximizing frequency shift, addressing space limitations in 5G and satellite systems.

Keywords:

dielectric anisotropy frequency tunable antenna liquid crystal smart antenna

More Related Videos

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

Related Experiment Videos

Last Updated: Nov 15, 2025

Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics

Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics

Published on: May 28, 2016

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

Area of Science:

Electrical Engineering
Materials Science
Telecommunications

Background:

Growing demand for smart antennas with frequency selective or beamforming capabilities in compact 5G and satellite communication systems.
Existing smart antenna research explores mechanical, electronic, and material characteristics.

Purpose of the Study:

To propose a tunable frequency planar patch antenna using liquid crystals with dielectric anisotropy.
To systematically design for minimal liquid crystal usage while maximizing operating frequency shifts.

Main Methods:

Analyzing electric field distribution on the patch antenna surface to optimize liquid crystal application.
Investigating liquid crystal alignment techniques to enhance dielectric anisotropy.
Addressing challenges with cell gap exceeding 100 μm to maintain alignment force and radiation characteristics.

Main Results:

A design method for maximizing antenna operating frequency change with minimal liquid crystal volume.
Proposed solutions to maintain liquid crystal alignment and antenna radiation characteristics for cell gaps > 100 μm.
Simulations performed to validate the proposed design and methods.

Conclusions:

The proposed liquid crystal-based planar patch antenna offers a viable solution for tunable frequency applications in space-constrained communication systems.
The design methodology optimizes the use of expensive liquid crystal materials and ensures robust performance.