Navigation Links
3-D printing method advances electrically small antenna design
Date:3/16/2011

While most electronic components benefit from decreased size, antennaswhether in a cell phone or on an aircraftsuffer limitations in gain, efficiency, system range, and bandwidth when their size is reduced below a quarter-wavelength.

"Recent attention has been directed toward producing antennas by screen-printing, inkjet printing, and liquid metal-filled microfluidics in simple motifs, such as dipoles and loops," explained Jennifer T. Bernhard, a professor of electrical and computer engineering at the University of Illinois at Urbana-Champaign. "However, these fabrication techniques are limited in both spatial resolution and dimensionality, yielding planar antennas that occupy a large area relative to the achieved performance."

"Omnidirectional printing of metallic nanoparticle inks offers an attractive alternative for meeting the demanding form factors of 3D electrically small antennas (ESAs)," stated Jennifer A. Lewis, the Hans Thurnauer Professor of Materials Science and Engineering and director of the Frederick Seitz Materials Research Laboratory at Illinois.

"To our knowledge, this is the first demonstration of 3D printed antennas on curvilinear surfaces," Lewis stated. The research findings and fabrication methods developed by Bernhard, Lewis, and their colleagues are featured in the cover article of the March 18 issue of Advanced Materials ("Conformal Printing of Electrically Small Antennas on Three-Dimensional Surfaces").

According to Bernhard, these antennas are electrically small relative to a wavelength (typically a twelfth of a wavelength or less) and exhibit performance metrics that are an order of magnitude better than those realized by monopole antenna designs.

"There has been a long-standing problem of minimizing the ratio of energy stored to energy radiatedthe Qof an ESA," Bernhard explained. "By printing directly on the hemispherical substrate, we have a highly versatile single-mode antenna with a Q that very closely approaches the fundamental limit dictated by physics (known as the Chu limit).

Conformal printing allows the antenna's meander lines to be printed on the outside or inside of hemispherical substrates, adding to its flexibility.

"Unlike planar substrates, the surface normal is constantly changing on curvilinear surfaces, which presents added fabrication challenges," Lewis noted. To conformally print features on hemispherical substrates, the silver ink must strongly wet the surface to facilitate patterning even when the deposition nozzle (100 μm diameter) is perpendicular to the printing surface.

To fabricate an antenna that can withstand mechanical handling, for example, the silver nanoparticle ink is printed on the interior surface of glass hemispheres. Other non-spherical ESAs can be designed and printed using a similar approach to enable integration of low Q antennas on, for example, the inside of a cell phone case or the wing of an unmanned aerial vehicle. The antenna's operating frequency is determined primarily by the printed conductor cross-section and the spacing (or pitch) between meander lines within each arm.

According to the researchers, their design can be rapidly adapted to new specifications, including other operating frequencies, device sizes, or encapsulated designs that offer enhanced mechanical robustness.

"This conformal printing technique can be extended other potential applications, including flexible, implantable, and wearable antennas, electronics, and sensors," Lewis said.


'/>"/>

Contact: Jennifer A. Lewis
jalewis@illinois.edu
217-244-4973
University of Illinois College of Engineering
Source:Eurekalert  

Related biology technology :

1. Printing New Organs: Foundation Funds Medical Technology That Replicates Human Tissue
2. Protein-printing technique gives snapshots of immune system defense
3. Cellular Dynamics International Scientists Report on Efficient Method to Produce Footprint-Free Induced Pluripotent Stem Cells (iPSCs) Under Feeder-Free Conditions
4. Penn physicists develop scalable method for making graphene
5. Stretched rubber offers simpler method for assembling nanowires
6. Quanterix Announces Publication of Novel Method Expanding Single Molecule Detection Capability
7. BD Expands Industrial Microbiology Rapid Methods Portfolio
8. Leading Scientific Laboratory Offers New Methods for Metals Testing
9. New Method of Nutrition to Permanently Protect Brain Cells from Genetic Damage
10. Robust methods for GMO detection ready at hand
11. New methods detect subtleties in human genomes repetitive landscapes
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
3-D printing method advances electrically small antenna design
(Date:12/8/2016)... , ... December 08, 2016 , ... ... the business of innovation is taking over sports. On Thursday, December 15th a ... how technology is disrupting the playing field at a Smart Talk session. Smart ...
(Date:12/8/2016)... SAN DIEGO , Dec. 8, 2016 /PRNewswire-USNewswire/ ... treatments for congestive heart failure and type 2 ... license for a novel adeno-associated virus (AAV) vector ... Kay , M.D., Ph.D., at Stanford University. The ... of its paracrine gene therapy product pipeline. ...
(Date:12/8/2016)... ... December 08, 2016 , ... ... that provide essential device-to-computer interconnect using USB or PCI Express, announced the FOMD-ACV-A4, ... The FOMD-ACV-A4 is a small, thin, SODIMM-style module that fits a standard 204-pin ...
(Date:12/8/2016)...  Anaconda BioMed S.L., a pre-clinical stage medical device ... neuro-thrombectomy system for the treatment of Acute Ischemic Stroke ... to join its Scientific Advisory Board (SAB). The SAB ... scientific and clinical experts to Anaconda BioMed S.L., as ... ® to its clinical phase. The SAB is ...
Breaking Biology Technology:
(Date:11/28/2016)... LONDON , Nov. 28, 2016 ... at a rate of 16.79%" The biometric system ... to grow further in the near future. The biometric ... 32.73 billion in 2022, at a CAGR of 16.79% ... biometrics system, integration of biometric technology in smartphones, rising ...
(Date:11/22/2016)... According to the new market research report "Biometric System Market by Authentication ... (Hardware and Software), Function (Contact and Non-contact), Application, and Region - Global ... from USD 10.74 Billion in 2015 to reach USD 32.73 Billion by ... Continue Reading ... ...
(Date:11/21/2016)... 21, 2016   Neurotechnology , a provider ... today announced that the MegaMatcher On Card fingerprint ... for the NIST Minutiae Interoperability Exchange (MINEX) ... mandatory steps of the evaluation protocol. ... test of fingerprint templates used to establish compliance ...
Breaking Biology News(10 mins):