JED - June 2016 - 31

APPLYING AESA TECHNOLOGY

10 GbE
10 GbE

Portable
DTA-320 / 680

Portable
DTA-590

Tunable Dual Transceiver
Quad Receiver / Transmitter
(12.5" x 7.6" x 5.5")

Record / Playback
(10.75" x 7.5" x 5" and 6 TB SSDs)

2 x Rx and 2 x Tx
or 4 x Rx / Tx
40/80 MHz BW

The Journal of Electronic Defense | June 2016

um On-Thectr

TM

Independently Tunable Dual Channel
Wideband Transceiver with Recording,
Processing & Broadcasting

Go

For the ELINT mission, Rockwell Collins' Rexford, sees "the overall changing dynamics of signal collection forcing
changes in the collection mechanisms,
whether it's a spinning DF antenna
which is high gain, or an interferometry
antenna which collects on a pulse-topulse process but is lower in gain, or
with the evolution of active electronically scanned arrays (AESAs) being used
in the signal collection environment."
Rexford points out that "it's not only
the aperture that's important, but the
processing as well, and the closer you
can get the processing to the aperture,
the higher the sensitivity. This allows you to better deal with radars in
the low probability of intercept (LPI)
environment."
In addition, he notes spread-spectrum signals require higher instantaneous bandwidth, and "this isn't a
function of the antenna, but of processing capabilities and tuners. We have
to develop wider instantaneous bandwidths (2 GHz, 4 GHz) and we're starting to see a move to this in some of the
'tier 1' nations." Even further out, Rexford sees the promise of extremely ultra-wideband instantaneous processing
capabilities through photonics receiver
and signal processing technology. The
goal is to get ultra-wideband processing at the aperture, and I think we'll see
that over the next five years."
Rexford says he sees AESA as an
enabling technology to achieve these
ultra-wideband capabilities. This is especially true, he says, for their use on
attritable assets and applications like
low-cost UASs in contested air spaces.
"In future, we'll need to work inside of
the threat environment, because the
big antennas, big interferometers that

currently drive DF and geolocation accuracies at range will be too big for the
UASs. We'll have to get down to small,
inexpensive arrays that the UAS can

carry closer to the radar signals to improve and offset sensitivity levels.
Still, at present, Rexford admits there
isn't a lot of advanced work in the area,
and "it's more of a five-year-out trend.
You have to get manufacturability costs
down, and improve and adjust the algorithms and beams to handle multibeams
simultaneously. I can see AESAs eventually replacing interferometry and DF
spinning capabilities over time. It's the
future state, but they have to be low
cost to be feasible." a

Sp
e

would be too big to be practical. Strobel
says their approach to the problem is to
use active antennas that can be switched
to passive operation. "We can bypass the
active part in our antenna so that the antenna element becomes passive, switching back and forth from active to passive
mode depending on the strength of the
signal. It gives you a tremendous increase
in system linearity and reduces the inevitable intermodulation product."

31

Dual Channel RFvision1-mini Transceiver
* Two (2) independently tuned receivers & transmitters (or quad receivers)
* 20 MHz - 6 GHz tuning range (optionally 1 MHz - 6 GHz) with 40 MHz or 80 MHz stare BW
* 16-bit data converters & programmable DDC & DUCs for BW selection (2.5 MHz to 80 MHz)
* I & Q data recording at full BW for both channels for hours
* Two (2) independently tuned RF output (40/80 MHz BW) of pre-recorded
or computer generated data
(20 MHz - 6 GHz)
* GPS option for time & position information
RF In
RF Out
* SigInspectorâ„¢- 1 GUI software for control & operation
RF / IF

X

100
MHz
ADC

SigInspectorâ„¢ - 1 GUI
Waterfall Display
20 MHz - 6 GHz

X

< 80 MHz >
FFT

IF / Baseband
(I & Q)

Occupancy
Log

LOs

75 MHz IF,
40 MHz IBW
16-Bit ADC &
16-Bit Dual
Interpolating DACs

DAC

DDC &
Network Cores

FPGA

10 GbE Network (I & Q Data)

DTA-320
(Tunable Dual
Ch. Transceiver)

1 GbE Control

DTA-590 RAID Server with
(Record/Playback) 6 TB Storage

Current & Previous Scans (MAX-Hold)

Record Button

Tablet
(GUI)

Dual Channel RFvision1-mini
(For DTA-680, IF = 185 MHz,
IBW = 80 MHz & Fs = 250 MHz)

Download the Spectrum-On-The-Go presentation
from the home page: www.d-ta.com

www.d-ta.com

782906_DTASystems.indd 1

sales@d-ta.com 1-877-382-3222

A Sensor Interface and Processing Company

12/18/15 6:49 PM


http://www.d-ta.com

JED - June 2016

Table of Contents for the Digital Edition of JED - June 2016

The View From Here
Conferences Calendar
Courses Calendar
From the President
The Monitor
Washington Report
World Report
Advances in COMINT/ DF Systems
Technology Survey: Communications and IED Jammers
SIGINT History
EW 101
Report from the 45th Annual Collaborative EW Symposium
AOC News
2016 AOC International Election Guide
Index of Advertisers
JED Quick Look
JED - June 2016 - cover1
JED - June 2016 - cover2
JED - June 2016 - 3
JED - June 2016 - 4
JED - June 2016 - 5
JED - June 2016 - The View From Here
JED - June 2016 - 7
JED - June 2016 - Conferences Calendar
JED - June 2016 - 9
JED - June 2016 - Courses Calendar
JED - June 2016 - 11
JED - June 2016 - From the President
JED - June 2016 - 13
JED - June 2016 - 14
JED - June 2016 - The Monitor
JED - June 2016 - 16
JED - June 2016 - 17
JED - June 2016 - 18
JED - June 2016 - 19
JED - June 2016 - 20
JED - June 2016 - 21
JED - June 2016 - Washington Report
JED - June 2016 - 23
JED - June 2016 - World Report
JED - June 2016 - 25
JED - June 2016 - Advances in COMINT/ DF Systems
JED - June 2016 - 27
JED - June 2016 - 28
JED - June 2016 - 29
JED - June 2016 - 30
JED - June 2016 - 31
JED - June 2016 - 32
JED - June 2016 - Technology Survey: Communications and IED Jammers
JED - June 2016 - 34
JED - June 2016 - 35
JED - June 2016 - 36
JED - June 2016 - 37
JED - June 2016 - 38
JED - June 2016 - 39
JED - June 2016 - 40
JED - June 2016 - 41
JED - June 2016 - 42
JED - June 2016 - SIGINT History
JED - June 2016 - 44
JED - June 2016 - 45
JED - June 2016 - EW 101
JED - June 2016 - 47
JED - June 2016 - Report from the 45th Annual Collaborative EW Symposium
JED - June 2016 - 49
JED - June 2016 - AOC News
JED - June 2016 - 2016 AOC International Election Guide
JED - June 2016 - 52
JED - June 2016 - 53
JED - June 2016 - 54
JED - June 2016 - 55
JED - June 2016 - 56
JED - June 2016 - Index of Advertisers
JED - June 2016 - JED Quick Look
JED - June 2016 - cover3
JED - June 2016 - cover4
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