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

Transmission Line Design Considerations

Transmission Line Design Considerations

Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...

Design Example: Creating a Hydraulic Model of a Dam Spillway

Design Example: Creating a Hydraulic Model of a Dam Spillway

Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.

You might also read

Related Articles

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

Sort by

Same author

Radon Exposure Concentrations in Finnish Workplaces.

Health physics·2023

Same author

Lung cancer incidence attributable to residential radon exposure in Finland.

Radiation and environmental biophysics·2022

Same author

IMPROVING THE ASSESSMENT OF OCCUPATIONAL EXPOSURE TO RADON IN ABOVE-GROUND WORKPLACES.

Radiation protection dosimetry·2021

Same author

Observation of Nonlinear Harmonic Generation of Bulk Modes in SAW Devices.

IEEE transactions on ultrasonics, ferroelectrics, and frequency control·2017

Same author

Background radiation and childhood leukemia: A nationwide register-based case-control study.

International journal of cancer·2016

Same author

Characterization of surface acoustic waves by stroboscopic white-light interferometry.

Optics express·2015

Search research articles

Related Experiment Video

Updated: Jun 15, 2026

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Published on: August 27, 2013

Design, simulation, and visualization of R-SPUDT devices with transverse mode suppression.

Marc Solal¹, Olli Holmgren, Kimmo Kokkonen

¹TriQuint Semiconductor, Research and Development Department, Apopka, FL, USA. marc.solal@tqs.com

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|February 25, 2010

Summary

To prevent unwanted modes in Surface-Acoustic-Wave (SAW) devices, a piston mode with a flat amplitude profile is introduced using a low-velocity region. This method enhances filter performance by minimizing ripple and spurious responses.

More Related Videos

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump

Published on: June 1, 2022

Related Experiment Videos

Last Updated: Jun 15, 2026

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Published on: August 27, 2013

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump

Published on: June 1, 2022

Area of Science:

* Surface Acoustic Wave (SAW) device physics and design.
* Acoustic wave propagation and mode analysis.

Background:

* Narrow band resonant Single-Phase Unidirectional Transducer (SPUDT) devices can suffer from undesired transverse modes.
* These modes cause passband ripple and stopband spurious responses, degrading device performance.

Purpose of the Study:

* To investigate and implement a piston mode in SPUDT devices to suppress transverse modes.
* To analyze the effectiveness of a low-velocity edge region in achieving a flat transverse amplitude profile.
* To propose and demonstrate a new implementation of piston-mode SPUDTs for improved filter characteristics.

Main Methods:

* Extension of the P-matrix model to incorporate transverse mode analysis in SPUDTs.
* Investigation and comparison of different physical implementations for the low-velocity edge region.
* Design and simulation of piston-mode SPUDTs, including acoustical sources and reflectors extending into the edge region.
* Experimental validation using a 199-MHz GSM base station filter, including electrical measurements and optical interferometer analysis of acoustic fields.

Main Results:

* The piston mode, achieved through a properly designed low-velocity edge region, effectively suppresses undesired transverse modes.
* Extending acoustical sources and reflectors into the edge region is crucial for minimizing coupling to higher-order modes.
* The proposed new implementation for piston-mode devices demonstrated successful performance on a 199-MHz GSM filter.

Conclusions:

* The piston mode approach is a viable strategy for enhancing the performance of narrow band resonant SPUDT devices.
* Careful design of the low-velocity edge region and transducer elements is essential for optimal mode control.
* The demonstrated piston-mode SPUDT offers a significant improvement over conventional designs, reducing ripple and spurious responses.