Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Vibrating micro plates bring order to overcrowded radio spectrum: New type of filter is prepared for future growth of frequency standards

he two square rectangles in the center of this SEM picture are the two resonators
he two square rectangles in the center of this SEM picture are the two resonators

Abstract:
GSM, WiFi, Bluetooth, 4G, GPS: a smartphone already has to handle many wireless standards. And this number will only increase further. There are still no good filters to keep all those future standards separate. Researchers at the MESA+ Institute for Nanotechnology have taken an important step with a new type of filter, based on micromechanics. They have published their finding in Applied Physics Letters.

Vibrating micro plates bring order to overcrowded radio spectrum: New type of filter is prepared for future growth of frequency standards

Enschede, Netherlands | Posted on October 31st, 2013

Filters that can be accurately tuned to the frequency band you want to receive as a user are becoming increasingly important. Otherwise, if a nearby signal is much stronger, it drowns out the signal you want to receive. The number of available frequencies is limited, so it is becoming ever busier. Intelligent use of the airwaves, by utilising every available piece, is becoming more important. The filters now presented by the researchers are based on micromechanical resonators and can be accurately tuned to the desired frequency.

One of the reasons for choosing a mechanical solution is that the conventional filter consists of an inductor and a capacitor, an ‘LC circuit'. Especially a good quality inductor is hard to achieve on a chip. The result would be: separate LC circuits for each frequency band, mounted outside the chip, which would take up too much space. New solutions are already being sought all over the world. The current standard is the electromechanical filter called Surface Acoustic Wave filter, but this, too, requires too much space if you need several of them.

Vibration

The solution presented by the researchers consists of two mechanical resonators. They vibrate at an adjustable frequency thanks to the piezoelectric material PZT. This material is applied to metal. Normally, the piezoelectric material vibrates perpendicular to the metal and the thickness of the layer determines the frequency. However,the frequency can be varied by making it vibrate in the same direction as the metal. Two resonators are used, which are not connected mechanically or electrically. By means of the intelligent handling of the input and output signals of the two resonators, adverse ‘parasitic' effects are negated. This is done by subtracting the output signals, while the input signals are ‘in phase'. The result is a selective filter - fourth order - that passes a limited part of the band and weakens the frequencies above and below. It can be accurately tuned with the vibrating frequencies of the two resonators. The filter presented by the researchers in Applied Physics Letters, operates at about 400 Megahertz. That is still too low for mobile applications, but new versions already reach higher frequencies, and Gigahertz frequencies needed for smartphones are feasible, according to the researchers.

The researchers also expect that these resonators can be integrated on the chip or directly ‘bonded' to the chip: they are much smaller than inductors. It therefore becomes possible to apply fifty resonator pairs, which facilitates flexible use of frequencies. This is needed, for example, in ‘cognitive radio', that uses each piece of free space as it becomes available and then jumps to another frequency when needed.

The research was conducted by the Transducers Science and Technology Group of the University of Twente MESA+ Institute for Nanotechnology in collaboration with the CTIT Institute Integrated Circuit Design group. There was also cooperation with the spinoff company SolMateS, which is specialised in making piezoelectric layers on chips. The project is financed by Dutch Technology Foundation STW.

####

For more information, please click here

Contacts:
Wiebe van der Veen
+31612185692

Copyright © AlphaGalileo

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

INSCX™ exchange to present Exchange trade reporting mechanism for engineered nanomaterials (NMs) to UK regulation agencies, insurers and upstream/downstream users April 17th, 2014

Transparent Conductive Films and Sensors Are Hot Segments in Printed Electronics: Start-ups in these fields show above-average momentum, while companies working on emissive displays such as OLED are fading, Lux Research says April 17th, 2014

Harris & Harris Group Continues Its Blog Series to Highlight Most Impactful Portfolio Companies With Champions Oncology, Inc. April 17th, 2014

Energy Research Facility Construction Project at Brookhaven Lab Wins U.S. Energy Secretary's Achievement Award April 16th, 2014

Wireless/telecommunications/RF/Antennas

LetiDays Grenoble to Present Multiple Perspectives on Development, Challenges and Markets for the IoT April 14th, 2014

Catching the (Invisible) Wave: UC Santa Barbara researchers create a unique semiconductor that manipulates light in the invisible infrared/terahertz range, paving the way for new and enhanced applications April 11th, 2014

Leti to Demonstrate Wireless High Data Rate Li-Fi Prototype at Light + Building 2014 in Frankfurt March 29th, 2014

Micro systems with big commercial potential featured in SPIE journal: Special section in Journal of Micro/Nanolithography, MEMS, and MOEMS highlights emerging MOEMS technologies March 25th, 2014

Discoveries

Scientists Capture Ultrafast Snapshots of Light-Driven Superconductivity: X-rays reveal how rapidly vanishing 'charge stripes' may be behind laser-induced high-temperature superconductivity April 16th, 2014

Scientists observe quantum superconductor-metal transition and superconducting glass: A team including MIPT physicist observed quantum superconductor-metal transition and superconducting glass April 16th, 2014

UT Arlington physicist creates new nanoparticle for cancer therapy April 16th, 2014

Targeting cancer with a triple threat: MIT chemists design nanoparticles that can deliver three cancer drugs at a time April 15th, 2014

Announcements

INSCX™ exchange to present Exchange trade reporting mechanism for engineered nanomaterials (NMs) to UK regulation agencies, insurers and upstream/downstream users April 17th, 2014

Transparent Conductive Films and Sensors Are Hot Segments in Printed Electronics: Start-ups in these fields show above-average momentum, while companies working on emissive displays such as OLED are fading, Lux Research says April 17th, 2014

Harris & Harris Group Continues Its Blog Series to Highlight Most Impactful Portfolio Companies With Champions Oncology, Inc. April 17th, 2014

Energy Research Facility Construction Project at Brookhaven Lab Wins U.S. Energy Secretary's Achievement Award April 16th, 2014

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals

Transparent Conductive Films and Sensors Are Hot Segments in Printed Electronics: Start-ups in these fields show above-average momentum, while companies working on emissive displays such as OLED are fading, Lux Research says April 17th, 2014

Scientists observe quantum superconductor-metal transition and superconducting glass: A team including MIPT physicist observed quantum superconductor-metal transition and superconducting glass April 16th, 2014

UT Arlington physicist creates new nanoparticle for cancer therapy April 16th, 2014

Relieving electric vehicle range anxiety with improved batteries: Lithium-sulfur batteries last longer with nanomaterial-packed cathode April 16th, 2014

NanoNews-Digest
The latest news from around the world, FREE







  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE