JED - April 2016 - 24

DARPA: Advanced

A

Pushing Semiconductor Performance for EW and
By John Haystead

The Journal of Electronic Defense | April 2016

24

At the Defense Advanced Research Projects Agency (DARPA), high speed and
high output power have long been principal goals in new semiconductor material research, but the ultimate objective
of much of its work is to push the capabilities of technology toward expanding
their reach in the Electromagnetic Spectrum (EMS).
The Agency has a long track record
related to developing new materials capabilities including silicon complementary metal-oxide-semiconductor (CMOS)
and III-V devices. III-V materials reference semiconductor elements in groups
III and V of the periodic table of chemical elements. Significant work in the
III-V area began with Gallium Arsenide
(GaAs), but has now also led into Indium
Phosphide (InP) and more recently Gallium Nitride (GaN). Both InP and GaN
having a continuing presence in DARPA's portfolio.

NEXT
Like most DARPA research efforts,
its current advanced materials research
builds on the work and accomplishments
of other earlier and related technology
development programs starting with the
Wide Bandgap Semiconductor Program,
a foundational GaN program that ran
through most of the early 2000s. This
effort developed GaN technology applicable to S band (2-4 GHz) and X band
(8 to 12 GHz) frequencies with characteristic transition frequencies for the
devices on the order of up to 150 GHz.
DARPA's Nitride Electronic NeXtGeneration Technology (NEXT) program
has continued this work with a focus
on scaling down the size of the devices allowing for parallel increases in
transition speeds and ultimately operating frequency. The goal of the NEXT
program was to scale devices into the

terahertz range and, today, DARPA has
demonstrated devices with characteristic transition frequencies over 500
GHz and an operating frequency range
well into W band (75-110 GHz). Says Dr.
Daniel Green, Program Manager, DARPA
Microsystems Technology Office (MTO),
"To give a physical sense of the scaling,
the devices made on the NEXT program
would fit inside the gate of the devices
that were made on the earlier program."
As explained by Green, the objective has not just been about pushing
toward higher speed, however, but also

about getting that high speed while
maintaining or improving the "Johnson's figure of merit" (JM), for delivering power at frequency. (As defined by
Wikipedia, "Johnson's figure of merit
is a measure of suitability of a semiconductor material for high-frequency
power transistor applications and requirements.") "What that means is
that we want to not only operate at W
band, but also to be able to project RF
power at those frequencies, capabilities
that aren't available from conventional
technologies," says Green.



JED - April 2016

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

The View From Here
Conferences Calendar
Courses Calendar
From the President
The Monitor
World Report
DARPA Profile: Advanced Materials
Mission Profile: Non-Kinetic Thinking Creates New Possibilities for Air and Missile Defense
Threat Monitor
EW 101
AOC News
Index of Advertisers
JED Quick Look
JED - April 2016 - cover1
JED - April 2016 - cover2
JED - April 2016 - 3
JED - April 2016 - 4
JED - April 2016 - 5
JED - April 2016 - The View From Here
JED - April 2016 - 7
JED - April 2016 - Conferences Calendar
JED - April 2016 - 9
JED - April 2016 - Courses Calendar
JED - April 2016 - 11
JED - April 2016 - From the President
JED - April 2016 - 13
JED - April 2016 - 14
JED - April 2016 - The Monitor
JED - April 2016 - 16
JED - April 2016 - 17
JED - April 2016 - 18
JED - April 2016 - 19
JED - April 2016 - 20
JED - April 2016 - 21
JED - April 2016 - 22
JED - April 2016 - World Report
JED - April 2016 - DARPA Profile: Advanced Materials
JED - April 2016 - 25
JED - April 2016 - 26
JED - April 2016 - 27
JED - April 2016 - Mission Profile: Non-Kinetic Thinking Creates New Possibilities for Air and Missile Defense
JED - April 2016 - 29
JED - April 2016 - 30
JED - April 2016 - 31
JED - April 2016 - 32
JED - April 2016 - 33
JED - April 2016 - 34
JED - April 2016 - Threat Monitor
JED - April 2016 - 36
JED - April 2016 - EW 101
JED - April 2016 - 38
JED - April 2016 - AOC News
JED - April 2016 - 40
JED - April 2016 - Index of Advertisers
JED - April 2016 - JED Quick Look
JED - April 2016 - cover3
JED - April 2016 - cover4
https://www.nxtbook.com/naylor/JEDM/JEDM0318
https://www.nxtbook.com/naylor/JEDM/JEDM0218
https://www.nxtbook.com/naylor/JEDM/JEDM0118
https://www.nxtbook.com/naylor/JEDM/JEDM1217
https://www.nxtbook.com/naylor/JEDM/JEDM1117
https://www.nxtbook.com/naylor/JEDM/JEDM1017
https://www.nxtbook.com/naylor/JEDM/JEDM0917
https://www.nxtbook.com/naylor/JEDM/JEDM0817
https://www.nxtbook.com/naylor/JEDM/JEDM0717
https://www.nxtbook.com/naylor/JEDM/JEDM0617
https://www.nxtbook.com/naylor/JEDM/JEDM0517
https://www.nxtbook.com/naylor/JEDM/JEDM0417
https://www.nxtbook.com/naylor/JEDM/JEDM0317
https://www.nxtbook.com/naylor/JEDM/JEDM0217
https://www.nxtbook.com/naylor/JEDM/JEDM0117
https://www.nxtbook.com/naylor/JEDM/JEDM1216
https://www.nxtbook.com/naylor/JEDM/JEDM1116
https://www.nxtbook.com/naylor/JEDM/JEDM1016
https://www.nxtbook.com/naylor/JEDM/JEDM0916
https://www.nxtbook.com/naylor/JEDM/JEDM0816
https://www.nxtbook.com/naylor/JEDM/JEDM0716
https://www.nxtbook.com/naylor/JEDM/JEDM0616
https://www.nxtbook.com/naylor/JEDM/JEDM0516
https://www.nxtbook.com/naylor/JEDM/JEDM0416
https://www.nxtbook.com/naylor/JEDM/JEDM0316
https://www.nxtbook.com/naylor/JEDM/JEDM0216
https://www.nxtbook.com/naylor/JEDM/JEDM0116
https://www.nxtbook.com/naylor/JEDM/JEDM1215
https://www.nxtbook.com/naylor/JEDM/JEDM1115
https://www.nxtbook.com/naylor/JEDM/JEDM1015
https://www.nxtbook.com/naylor/JEDM/JEDM0915
https://www.nxtbook.com/naylor/JEDM/JEDM0815
https://www.nxtbook.com/naylor/JEDM/JEDM0715
https://www.nxtbook.com/naylor/JEDM/JEDM0615
https://www.nxtbook.com/naylor/JEDM/JEDM0515
https://www.nxtbook.com/naylor/JEDM/JEDM0415
https://www.nxtbook.com/naylor/JEDM/JEDM0315
https://www.nxtbook.com/naylor/JEDM/JEDM0215
https://www.nxtbook.com/naylor/JEDM/JEDM0115
https://www.nxtbook.com/naylor/JEDM/JEDM1214
https://www.nxtbook.com/naylor/JEDM/JEDM1114
https://www.nxtbook.com/naylor/JEDM/JEDM1014
https://www.nxtbook.com/naylor/JEDM/JEDM0914
https://www.nxtbook.com/naylor/JEDM/JEDM0814
https://www.nxtbook.com/naylor/JEDM/JEDM0714
https://www.nxtbook.com/naylor/JEDM/JEDM0614
https://www.nxtbook.com/naylor/JEDM/JEDM0514
https://www.nxtbook.com/naylor/JEDM/JEDM0414
https://www.nxtbook.com/naylor/JEDM/JEDM0314
https://www.nxtbook.com/naylor/JEDM/JEDM0214
https://www.nxtbook.com/naylor/JEDM/JEDM0114
https://www.nxtbook.com/naylor/JEDM/JEDM1213
https://www.nxtbook.com/naylor/JEDM/JEDM1113
https://www.nxtbook.com/naylor/JEDM/JEDM1013
https://www.nxtbook.com/naylor/JEDM/JEDM0913
https://www.nxtbook.com/naylor/JEDM/JEDM0813
https://www.nxtbook.com/naylor/JEDM/JEDM0713
https://www.nxtbook.com/naylor/JEDM/JEDM0613
https://www.nxtbook.com/naylor/JEDM/JEDM0513
https://www.nxtbook.com/naylor/JEDM/JEDM0413
https://www.nxtbook.com/naylor/JEDM/JEDM0313
https://www.nxtbook.com/nxtbooks/naylor/JEDM0213
https://www.nxtbook.com/nxtbooks/naylor/JEDM0113
https://www.nxtbook.com/nxtbooks/naylor/JEDM1212
https://www.nxtbook.com/nxtbooks/naylor/JEDM1112
https://www.nxtbook.com/nxtbooks/naylor/JEDM1012
https://www.nxtbook.com/nxtbooks/naylor/JEDM0912
https://www.nxtbook.com/nxtbooks/naylor/JEDM0812
https://www.nxtbook.com/nxtbooks/naylor/JEDM0712
https://www.nxtbook.com/nxtbooks/naylor/JEDM0612
https://www.nxtbook.com/nxtbooks/naylor/JEDM0512
https://www.nxtbook.com/nxtbooks/naylor/JEDM0412
https://www.nxtbook.com/nxtbooks/naylor/JEDM0312
https://www.nxtbook.com/nxtbooks/naylor/JEDM0212
https://www.nxtbook.com/nxtbooks/naylor/JEDM0112
https://www.nxtbook.com/nxtbooks/naylor/JEDM1211
https://www.nxtbook.com/nxtbooks/naylor/JEDM1111
https://www.nxtbook.com/nxtbooks/naylor/JEDM1011
https://www.nxtbook.com/nxtbooks/naylor/JEDM0911
https://www.nxtbook.com/nxtbooks/naylor/JEDM0811
https://www.nxtbook.com/nxtbooks/naylor/JEDM0711
https://www.nxtbook.com/nxtbooks/naylor/JEDM0611
https://www.nxtbook.com/nxtbooks/naylor/JEDM0511
https://www.nxtbook.com/nxtbooks/naylor/JEDM0411
https://www.nxtbook.com/nxtbooks/naylor/JEDM0311
https://www.nxtbook.com/nxtbooks/naylor/JEDM0211
https://www.nxtbook.com/nxtbooks/naylor/JEDM0111
https://www.nxtbook.com/nxtbooks/naylor/JEDM1210
https://www.nxtbook.com/nxtbooks/naylor/JEDM1110
https://www.nxtbook.com/nxtbooks/naylor/JEDM1010
https://www.nxtbook.com/nxtbooks/naylor/JEDM0910
https://www.nxtbook.com/nxtbooks/naylor/JEDM0810
https://www.nxtbook.com/nxtbooks/naylor/JEDM0710
https://www.nxtbook.com/nxtbooks/naylor/JEDM0610
https://www.nxtbook.com/nxtbooks/naylor/JEDM0510
https://www.nxtbook.com/nxtbooks/naylor/JEDM0410
https://www.nxtbook.com/nxtbooks/naylor/JEDM0310
https://www.nxtbook.com/nxtbooks/naylor/JEDM0210
https://www.nxtbook.com/nxtbooks/naylor/JEDM0110
https://www.nxtbook.com/nxtbooks/naylor/JEDM1209
https://www.nxtbook.com/nxtbooks/naylor/JEDM1109
https://www.nxtbook.com/nxtbooks/naylor/JEDM1009
https://www.nxtbook.com/nxtbooks/naylor/JEDM0909
https://www.nxtbook.com/nxtbooks/naylor/JEDM0809
https://www.nxtbook.com/nxtbooks/naylor/JEDM0709
https://www.nxtbook.com/nxtbooks/naylor/JEDM0609
https://www.nxtbook.com/nxtbooks/naylor/JEDM0509
https://www.nxtbook.com/nxtbooks/naylor/JEDM0409
https://www.nxtbook.com/nxtbooks/naylor/JEDM0309
https://www.nxtbook.com/nxtbooks/naylor/JEDM0209
https://www.nxtbook.com/nxtbooks/naylor/JEDM0109
https://www.nxtbook.com/nxtbooks/naylor/JEDM0908
https://www.nxtbookmedia.com