Navigation Links
How to make microwaves on a chip to replace X-rays for medical imaging and security
Date:5/29/2008

Is microwave radiation the nondestructive imaging technology of the future? Microwaves with frequencies from a few hundred gigahertz (GHz) up to slightly over 1 terahertz (THz), penetrate just a short distance into surfaces without the ionizing damage caused by X-rays. The technology could be used to detect skin cancer or image dental flaws beneath the enamel. It could also be a valuable tool for airport security, to detect objects hidden under clothing.

Most of these applications require inexpensive portable hardware that can generate signals in the GHz to THz range with more than 1 watt of power. However, transistors on a standard silicon chip have been limited to a few milliwatts at up to about 100 GHz.

Now a method of generating high-power signals at frequencies of 200 GHz and higher on an ordinary silicon chip has been proposed by Ehsan Afshari, Cornell assistant professor of electrical and computer engineering, and Harish Bhat, assistant professor of mathematics at the University of California-Merced. The researchers present a mathematical analysis of the new method in the May issue of the journal Physical Review E.

Afshari and Bhat propose to use a phenomenon known as nonlinear constructive interference. Linear constructive interference occurs when two signals that are in phase that is, with their peaks and valleys matched produce a new signal as large as both added together. But if the signals are traveling through an uneven medium, the waves can become distorted, some delayed, some moving ahead to produce a "nonlinear" result that combines many small waves into fewer large peaks. Afshari likens the effect to the breaking of waves on the seashore. In the open ocean, waves travel as smooth undulations. But near shore the waves encounter an uneven surface at varying depths and become distorted into breakers.

To create this effect on a chip, the researchers propose a lattice of squares made up of inductors the equivalent
'/>"/>

Contact: Blaine Friedlander
bpf2@cornell.edu
607-254-8093
Cornell University Communications
Source:Eurekalert

Page: 1 2

Related biology news :

1. Research examines factors in delaying or declining total knee replacement surgery
2. Testosterone replacement theraphy beneficial in men 60 and older
3. MU researcher links hormone replacement therapy to breast cancer
4. Listen-up ladies: Dont postpone knee-replacement surgery
5. Single-largest biodiversity survey says primary rainforest is irreplaceable
6. Lensless camera uses X-rays to view nanoscale materials and biological specimens
7. 4 Stanford faculty named Howard Hughes Medical Institute Investigators
8. Engineer to spearhead research into cell metabolism and medical injuries
9. UMass Medical Schools Craig Mello elected to American Academy of Arts and Sciences
10. American College of Medical Genetics makes genetic testing recommendations in new policy statement
11. Medical College researchers find dinosaur clues in fat
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/10/2014)... ant Anoplolepis gracilipes is ranked amongst the top ... ecological impacts on islands. A new study published in the ... assesses the effects and dangers of the introduction of the ... palm forest of the Valle de Mai, a UNESCO World ... Valle de Mai is a unique ecosystem containing many endemic ...
(Date:7/9/2014)... Philadelphia, PA, July 10, 2014 Inflammatory diseases ... same patient, complicating treatment because a medication effective ... such example is the anti-arthritic medication dexamethasone, which ... disease. A study in the August issue of ... the effects of a new class of anti-arthritic ...
(Date:7/9/2014)... Bacteria found in the bladders of healthy women ... form of incontinence, according to researchers from Loyola ... These findings, published July 9, 2014, in the ... , suggest that bacterial communities may play a ... incontinence (UUI) is a common, yet poorly understood, ...
Breaking Biology News(10 mins):Invasion of yellow crazy ant in a Seychelles UNESCO palm forest: Threats and solutions 2New class of anti-arthritis drugs effectively treats multiple inflammatory diseases 2
... know - are drawing up gold particles from the earth via ... from CSIRO made the discovery and have published their findings in ... a hydraulic pump its roots extend tens of metres into ... gold is likely to be toxic to the plant, it,s moved ...
... , Oct. 23, 2013 Increasing awareness ... commercial biometrics market. While historically the adoption of ... recent years have witnessed considerable demand for applications ... finance. Iris and face recognition algorithms have undergone ...
... SALT LAKE CITYFor people with a family history of ... to 10 percent of colorectal cancers could be missed ... is the third most common cancer in the United ... population-based study to date, researchers from Huntsman Cancer Institute ...
Cached Biology News:There's gold in them thar trees 2Frost & Sullivan: Global Commercial Biometrics Market to Grow Considerably as Awareness Increases 2Frost & Sullivan: Global Commercial Biometrics Market to Grow Considerably as Awareness Increases 3Frost & Sullivan: Global Commercial Biometrics Market to Grow Considerably as Awareness Increases 4Colon cancer screening guidelines may miss 10 percent of colon cancers 2
(Date:1/15/2014)... Freeslate, Inc ., the leading ... Lupin Limited, one of India’s top five pharmaceutical companies, ... System for high throughput solid form screening. ... a wide range of quality, affordable generic and branded ...
(Date:1/14/2014)... Carahsoft and CDS Federal Services have scheduled ... 2pm EST (11am PST), “Natural Language Processing: Converting Raw ... technology can turn raw, heterogeneous data into actionable knowledge ... online webinar will last approximately one hour. , Synopsis: ...
(Date:1/14/2014)... January 14, 2014 EquitiesIQ, a leading ... (OTCQB: ALQA). Alliqua is an emerging biomedical company acquiring, ... wound care market. , Free report download: http://equitiesiq.com/reports/alliqua/ ... a seasoned management team and Board, which launched the ...
(Date:1/14/2014)... In recent years, growing suspicion about ... product development and promotion has led to unprecedented levels ... by concerns about the insidious impact of commercialization of ... fines to the world’s biggest pharmas for illegal marketing ...
Breaking Biology Technology:Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3
... Reportlinker.com announces that a new market research report ... Global Biotechnology Reagents Industry ... the worldwide markets for Biotechnology Reagents in US$ ... Reagents, DNA Sequencing/Synthesis Reagents, Electrophoresis Reagents, Flow Cytometry ...
... licensed within the next 4 years, as manufacturers are ... candidates in collaboration with health authorities and developing countries ... licensure, a team of leading scientists said. ... for regulatory review of dengue vaccines, while plans are ...
... from the University at Buffalo could lead to new solutions ... from drinking water. To the naked eye, both water ... are measured by the nanometer, a unit of length about ... , But at the microscopic level, the two actually differ ...
Cached Biology Technology:Reportlinker Adds Global Biotechnology Reagents Industry 2Capacity of developing country NRAs key to accelerated introduction of upcoming dengue vaccines 2Capacity of developing country NRAs key to accelerated introduction of upcoming dengue vaccines 3A nano-solution to global water problem: Nanomembranes could filter bacteria 2
... 20 years of expertise in the field ... offers the most powerful systems on the ... 40 000 in-microplate tests requiring incubation and ... different modules (such as worktable shaker incubators, ...
... or Isolated Sequence) siRNA Test System is ... evaluation of a potential of any DNA ... for RNA interference (RNAi). Current computer-based RNAi ... the probability of selected sequence to be ...
... pre-validated SNP sequencing services ... within 93 genes including ... more than 80 tyrosine ... were developed and validated ...
Glycerol-based mounting medium for immunofluorescence microscopy. Formulated to retard photobleaching of fluorochromes such as fluorescein and rhodamine. Product can also be used as a diluent for fl...
Biology Products: