Navigation Links
UCLA-led research team develops world's most powerful nanoscale microwave oscillators
Date:6/26/2012

A team of UCLA researchers has created the most powerful high-performance nanoscale microwave oscillators in the world, a development that could lead to cheaper, more energy-efficient mobile communication devices that deliver much better signal quality.

Today's cell phones, WiFienabled tablets and other electronic gadgets all use microwave oscillators, tiny devices that generate the electrical signals used in communications. In a cell phone, for example, the transmitter and receiver circuits contain oscillators that produce radio-frequency signals, which are then converted by the phone's antenna into incoming and outgoing electromagnetic waves.

Current oscillators are silicon-based and use the charge of an electron to create microwaves. The UCLA-developed oscillators, however, utilize the spin of an electron, as in the case of magnetism, and carry several orders-of-magnitude advantages over the oscillators commonly in use today.

UCLA's electron spinbased oscillators grew out of research at the UCLA Henry Samueli School of Engineering and Applied Science sponsored by the Defense Advanced Research Projects Agency (DARPA). This research focused on STT-RAM, or spin-transfer torque magnetoresistive random access memory, which has great potential over other types of memory in terms of both speed and power efficiency.

"We realized that the layered nanoscale structures that make STT-RAM such a great candidate for memory could also be developed for microwave oscillators for communications," said principal investigator and research co-author Kang L. Wang, UCLA Engineering's Raytheon Professor of Electrical Engineering and director of the Western Institute for Nanoelectronics (WIN).

The structures, called spin-transfer nano-oscillators, or STNOs, are composed of two distinct magnetic layers. One layer has a fixed magnetic polar direction, while the other layer's magnetic direction can be manipulated to gyrate by passing an electric current through it. This allows the structure to produce very precise oscillating microwaves.

"Previously, there had been no demonstration of a spin-transfer oscillator with sufficiently high output power and simultaneously good signal quality, which are the two main metrics of an oscillator hence preventing practical applications," said co-author Pedram Khalili, project manager for the UCLADARPA research programs in STT-RAM and non-volatile logic. "We have realized both these requirements in a single structure."

The SNTO was tested to show a record-high output power of close to 1 micro-watt, with a record narrow signal linewidth of 25 megahertz. Output power refers to the strength of the signal, and 1 micro-watt is the desired level for STNOs to be practical for applications. Also, a narrow signal linewidth corresponds to a higher quality signal at a given frequency. This means less noise and interference, for a cleaner voice and video signal. It also means more users can be accommodated onto a given frequency band.

In addition, the new nanoscale system is about 10,000-times smaller than the silicon-based oscillators used today. The nano-oscillators can easily be incorporated into existing integrated circuits (computer chips), as they are compatible with current design and manufacturing standards in the computer and electronic device industries. And the oscillators can be used in both analog (voice) and digital (data) communications, which means smart phones could take full advantage of them.

"For the past decade, we have been working to realize a new paradigm in nanoelectronics and nanoarchitectures," said Wang, who is also a member of the California NanoSystems Institute at UCLA. "This has led to tremendous progress in memory research. And along those same lines, we believe these new STNOs are excellent candidates to succeed today's oscillators."

The paper, "High-Power Coherent Microwave Emission from Magnetic Tunnel Junction Nano-oscillators with Perpendicular Anisotropy," has been published online in the journal ACS Nano.

Other key authors include Hongwen Jiang, UCLA professor of physics and astronomy, and lead author Zhongming Zeng, formerly a postdoctoral scholar in Jiang's laboratory and currently a professor at the Suzhou Institute of Nanotech and Nanobionics, Chinese Academy of Sciences.


'/>"/>

Contact: Matthew Chin
mchin@support.ucla.edu
310-206-0680
University of California - Los Angeles
Source:Eurekalert

Related biology technology :

1. Wolters Kluwer Research Now Available via Bloomberg Tradebook
2. ACORN Research, LLC Announces Partnership with AdeptBio, LLC
3. New England Biolabs Introduces Polbase, an Information Repository of Scientific Data for Polymerase Researchers
4. Researching graphene nanoelectronics for a post-silicon world
5. In new quantum-dot LED design, researchers turn troublesome molecules to their advantage
6. BBVA Foundation Unites the Efforts of Massachusetts General Hospital and Barcelonas Vall dHebron Hospital in Biomarker Research for Personalized Cancer Therapies
7. New research points to benefits of innovative cobas® HPV test for primary screening as Englands cervical cancer screening programme includes the test in current HPV "triage" rollout
8. Multidisciplinary team of researchers develop world’s lightest material
9. K computer research results awarded ACM Gordon Bell Prize
10. ResearchMoz: Ophthalmic Devices Market to 2017 - Glaucoma and Cataract Surgery Devices, Minimally Invasive Procedures in Ophthalmic Surgery to Drive the Ophthalmic Surgery Market
11. Researchers shrink tumors and minimize side effects using tumor-homing peptide to deliver treatment
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/18/2017)... (PRWEB) , ... January 18, 2017 , ... ... the publishing of the latest paper by its Science Editor, Dr. Elisabeth Bik, ... Tijdschrift voor Medische Microbiologie). Dr. Bik joined uBiome in October 2016 from her ...
(Date:1/18/2017)... 18, 2017 Shareholder rights law firm Johnson ... the board members of CoLucid Pharmaceuticals, Inc. (NASDAQ: ... with the proposed sale of the Company to Eli ... develops small molecules for the acute treatment of migraines. ... had signed a definitive merger agreement with Eli Lilly. ...
(Date:1/18/2017)... 18, 2017  Caris Life Sciences, a leading ... the largest private funder of pancreatic cancer research, ... the impact of immunotherapy in the treatment of ... services to identify potential trial candidates based on ... physicians and study investigators. The Lustgarten Foundation is ...
(Date:1/18/2017)... India , Jan. 18, 2017  Market Research Future published ... Diagnostics Market is expected to grow at a CAGR of 12% ... ... disease caused due to the abnormal cell division without any control. ... cause harm to them. These cancer cells can spread to other ...
Breaking Biology Technology:
(Date:12/16/2016)... The global wearable medical device market, in terms of value, is ... billion in 2016, at a CAGR of 18.0% during the forecast ... Growth ... devices, launch of a growing number of smartphone-based healthcare apps compatible ... and increasing focus on physical fitness. Furthermore, growing ...
(Date:12/15/2016)... Dec 15, 2016 ... Research and Markets has announced the addition of ... The report forecasts the global military biometrics market to ... The report has been prepared based on an in-depth market analysis ... its growth prospects over the coming years. The report also includes a ...
(Date:12/15/2016)... -- "Increase in mobile transactions is driving the growth ... is expected to grow from USD 4.03 billion in ... CAGR of 29.3% between 2016 and 2022. The market ... for smart devices, government initiatives, and increasing penetration of ... expected to grow at a high rate during the ...
Breaking Biology News(10 mins):