Plug-and-Play Chip Cuts Size, Weight of Radar Antennas

New chip is targeted at defense and commercial aircraft, as well air traffic control, surveillance, and even 5G communications.

Charles Murray

May 18, 2018

3 Min Read
Plug-and-Play Chip Cuts Size, Weight of Radar Antennas

A new beamforming chip promises to shrink the size and weight of aircraft antennas by eliminating the need for mechanical steering linkages.

The chip could serve in radar for defense aircraft and for in-flight broadband on commercial jets. Analog Devices, Inc., maker of the new chip, also foresees it being used in air traffic control, surveillance, weather monitoring, and even 5G communications.

ADI engineers say the key is the product’s inherent ability to cut size and weight. “By going to an electronically steered antenna design, we are able to reduce the size of the antenna element itself and eliminate the mechanical arm and motor required to turn the dish,” Mike Chowkwanyun, product line manager for phased-array ICs, told Design News. “So you could have a much smaller flat antenna design that sits almost flush against the plane’s fuselage, and requires a smaller dome to cover the antenna.”

The ADAR1000 chip replaces 12 discrete components needed for antenna phase-gain adjustments and digital controls. (Image source: Analog Devices, Inc.)

Known as the ADAR1000, the chip replaces 12 discrete components needed for antenna phase-gain adjustments and digital controls. It’s designed for frequency ranges between 8 GHz and 16 GHz.

ADI engineers say the new technology could shrink the weight and volume of a typical aircraft radar antenna by as much as 50%. Such antennas typically reside in the nose cones of fighter jets and are accompanied by mechanical arms that steer the antenna. Similarly, commercial planes use a conformal antenna and a steering linkage covered by a dome.

Used for in-flight broadband applications, the new technology could shrink the weight and volume of a typical aircraft radar antenna by as much as 50%. (Image source: Analog Devices, Inc.)

“By going to an electronically steered antenna, we can lower the profile of the antenna dish itself—lower the weight and lower the volume,” Chowkwanyn told us. “And since there are no mechanical moving parts at all, it helps improve long-term reliability.”

The ADAR1000 also offers a plug-and-play design that ADI says will appeal to designers with little or no radio frequency (RF) experience. “We are able to allow smaller customers who may be new to phased array, or who may lack RF experience, to put together a radio that utilizes the benefits of phased array for whatever applications they’re designing for,” Chowkwanyun said.

Somewhat surprisingly, ADI is also targeting the new technology at applications outside of defense and avionics. Even there, size and weight reduction are important, Chowkwanyun said. “The phased array is now being evaluated outside of the traditional group of users,” he told us. “We’re starting to see phased array being considered for satellite and 5G communications.”

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Senior technical editor Chuck Murray has been writing about technology for 34 years. He joined Design News in 1987, and has covered electronics, automation, fluid power, and auto.  

About the Author(s)

Charles Murray

Charles Murray is a former Design News editor and author of the book, Long Hard Road: The Lithium-Ion Battery and the Electric Car, published by Purdue University Press. He previously served as a DN editor from 1987 to 2000, then returned to the magazine as a senior editor in 2005. A former editor with Semiconductor International and later with EE Times, he has followed the auto industry’s adoption of electric vehicle technology since 1988 and has written extensively about embedded processing and medical electronics. He was a winner of the Jesse H. Neal Award for his story, “The Making of a Medical Miracle,” about implantable defibrillators. He is also the author of the book, The Supermen: The Story of Seymour Cray and the Technical Wizards Behind the Supercomputer, published by John Wiley & Sons in 1997. Murray’s electronics coverage has frequently appeared in the Chicago Tribune and in Popular Science. He holds a BS in engineering from the University of Illinois at Chicago.

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