Navigation Links
World's most complex silicon phased-array chip developed at UC-San Diego

UC San Diego electrical engineers have developed the worlds most complex phased array or radio frequency integrated circuit. This DARPA-funded advance is expected to find its way into U.S. defense satellite communication and radar systems. In addition, the innovations in this chip design will likely spill over into commercial applications, such as automotive satellite systems for direct broadcast TV, and new methods for high speed wireless data transfer.

This is the first 16 element phased array chip that can send at 30-50 GHz. The uniformity and low coupling between the elements, the low current consumption and the small size it is just 3.2 by 2.6 square millimeters are all unprecedented. As a whole system, there are many many firsts, said Gabriel Rebeiz, the electrical engineering professor from the UCSD Jacobs School of Engineering leading the project. The work was done by two graduate students, Kwang-Jin Koh and Jason May, both at the Electrical and Computer Engineering Department (ECE) at UCSD. Rebeiz presented the new chip at DARPA TEAM Meeting, August 28-29, 2007 in Chicago, Illinois. Additional details of the chip will be submitted to an academic journal later this year.

This chip the UCSD DARPA Smart Q-Band 4x4 Array Transmitter is strictly a transmitter. We are working on a chip that can do a transmit and receive function, said Rebeiz.

This compact beamforming chip will enable a breakthrough in size, weight, performance and cost in next-generation phased arrays for millimeter-wave military sensor and communication systems, DARPA officials wrote in a statement.

DARPA has funded us to try to get everything on a single silicon chip which would reduce the cost of phased arrays tremendously. In large quantities, this new chip would cost a few dollars to manufacture. Obviously, this is only the transmitter. You still need the receiver but one can easily build the receiver chip based on the designs available in the transmitter chip. Our work addresses the most costly part of the phased array the 16:1 divider, phase shifters, amplitude controllers and the uniformity and isolation between channels, said Rebeiz

The chip also contains all the CMOS digital circuits necessary for complete digital control of the phased array, and was done using the commercial Jazz SBC18HX process. This is a first and greatly reduces the fabrication complexity of the phased array. The chip has been designed for use at the defense satellite communications frequency the Q-band - which goes from 40 to 50 GHz.

If you take the same design and move it to the 24 or 60 GHz range, you can use it for commercial terrestrial communications, said Rebeiz who is also a lead on a separate project, funded by Intel and a UC-Discovery Grant, to create silicon CMOS phased array chips that could be embedded into laptops and serve as high speed data transfer tools.

The Intel project is a collaboration between Rebeiz, Larry Larson and Ian Galton all electrical engineering professors at the UCSD Jacobs School of Engineering. Larson also serves as the chair of the Department of Electrical and Computer Engineering.

If you wanted to download a large movie file, a base station could find you, zoom onto you, and direct a beam to your receiver chip. This could enable data transfer of hundreds of gigabytes of information very quickly, and without connecting a cable or adhering to the alignment requirements of wireless optical data transfer, explained Rebeiz who estimated that this kind of system could be available in as little as three years.

Phased Array Background Information:

Phased arrays have been around for more than half a century. They are groups of antennas in which the relative phases of the signals that feed them are varied so that the effective radiation pattern of the array is reinforced in a particular direction and suppressed in undesired directions. This property combined with the fact that radio waves can pass through clouds and most other materials that stymie optical communication systems has led engineers to use phased arrays for satellite communications, and for detecting incoming airplanes, ships and missiles.

Some phased arrays are larger than highway billboards and the most powerful used as sophisticated radar, surveillance and communications systems for military aircraft and ships can cost hundreds of millions of dollars. The high cost has prevented significant spread beyond military and high-end satellite communication applications. Engineers are now working to miniaturize them and fully integrate them into silicon-based electronic systems for both military and commercial applications.

The new UCSD chip packs 16 channels into a 3.2 by 2.6 mm chip. The input signal is divided on-chip into 16 different paths with equal amplitude and phase using an innovative design, and the phase and gain of each of the 16 channels is controlled electronically to direct the antenna pattern (beam) into a specific direction.

By manipulating the phase, you can steer the beam electronically in nanoseconds. With the amplitude, you control the width of the beam, which is critical, for example, when you send information to from one satellite to another but you dont want the signal to reach any nearby satellites. And with amplitude and phase control, you can synthesize deep nulls in the antenna pattern so as to greatly reduce the effect of interfering signals from neighboring transmitters.


Contact: Daniel Kane
University of California - San Diego  

Related biology technology :

1. OpGen Creates Map of Worlds Most Lethal Fungus
2. Structural Analysis of Glycosylated Peptides in Complex Mixtures with Ion Trap MSn
3. Purification of the Components of Human Macular Carotenoid-Binding Complex, Rev A
4. Whole Gel Eluter Purification of a Functional Multiprotein DNA Replication Complex, Rev A
5. Complex Peptide Mixture Analysis on the Finnigan LTQ Linear Ion Trap Mass Spectrometer
6. LC-MALDI and MALDI-MS/MS for the Analysis of Complex Peptide Mixtures
7. Fusion 2007: CA chief says IT complexity raises risk
8. Simplicity beats complexity every time
9. The Complexities, Cost of Midwest Biotech Drug Development
10. What makes Silicon Valley so different?
11. New Silicon Pastures director envisions more home cooking for Wisconsin angels
Post Your Comments:
Related Image:
World's most complex silicon phased-array chip developed at UC-San Diego
(Date:6/23/2016)... NEW YORK , June 23, 2016 ... the trading session at 4,833.32, down 0.22%; the Dow Jones ... the S&P 500 closed at 2,085.45, down 0.17%. has ... INFI ), Nektar Therapeutics (NASDAQ: NKTR ... BIND Therapeutics Inc. (NASDAQ: BIND ). Learn more ...
(Date:6/23/2016)... ... June 23, 2016 , ... Regulatory Compliance Associates® ... provides a free webinar on Performing Quality Investigations: Getting to Root ... CT at no charge. , Incomplete investigations are still a major concern to ...
(Date:6/23/2016)... SAN FRANCISCO , June 22, 2016  Amgen ... platinum sponsorship of the QB3@953 life sciences ... improve human health. The shared laboratory space at QB3@953 ... startups overcome a key obstacle for many early stage ... As part of the sponsorship, Amgen launched two "Amgen ...
(Date:6/22/2016)... , June 22, 2016 Cell Applications, ... allow them to produce up to one billion ... lot within one week. These high-quality, consistent stem ... preparing cells and spend more time doing meaningful, ... a proprietary, high-volume manufacturing process that produces affordable, ...
Breaking Biology Technology:
(Date:4/15/2016)... , April 15, 2016  A new ... make more accurate underwriting decisions in a fraction ... timely, competitively priced and high-value life insurance policies ... screenings. With Force Diagnostics, rapid testing ... lifestyle data readings (blood pressure, weight, pulse, BMI, ...
(Date:4/14/2016)... April 14, 2016 BioCatch ... Detection, today announced the appointment of Eyal Goldwerger ... role. Goldwerger,s leadership appointment comes at a ... of the deployment of its platform at several of ... technology, which discerns unique cognitive and physiological factors, is ...
(Date:3/31/2016)... , March 31, 2016   ... ("LegacyXChange" or the "Company") LegacyXChange is excited ... of its soon to be launched online site for ... ) will also provide potential shareholders a ... DNA technology to an industry that is notorious for ...
Breaking Biology News(10 mins):