JED - June 2014 - 34

been identified. In IPC, they include: ultra-wideband, agile, survivable photonic RF receiver front-ends with increased
receiver dynamic range, strong signal
suppression, and compact up/down
conversion; and integrated wideband
Simultaneous Transmit and Receive
(STAR) capability with equalization and
cancellation via components and processing. As described by Dr. Hary, "Even
microwave and millimeter-wave signals
seem pretty narrowband compared to
the bandwidth of the photonic carrier
and, once you get into the photonic do-

main, it's very low loss." According to
Dr. Hary, it's this conversion process,
and the typical performance penalty
associated with it, that the technology
development effort is focused on. "The
electrical to optical E-O and O-E conversions have always been the stumbling
point for photonics, but once you're in
the photonic domain, there are tremendous advantages, including broad bandwidth, very low loss allowing for very
long distance transmission, and avoidance of the EMI susceptibility issues of
electrical conductors. With an optical

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The Journal of Electronic Defense | June 2014

34

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carrier, you can think about starting
to do simultaneous Transmit/Receive
(T/R) from the same system."
In the mmW area, advances are
achievable in linear, efficient solidstate, high power amplifiers (HPAs);
high-dynamic range, low-noise amplifiers (LNAs)/mixers and time-delay units
(TDUs)/ beam forming networks (BFNs)/
dual-polarization radiators for wideband
mmW dual-beam electronically scanned
arrays (ESAs); wideband, efficient vacuum electronic devices (VEDs); HPAs/
solid-state drivers; and low-loss, highpower-handling control components.
Says Dr. Hary, "The main issue in the
mmW regime is that there really isn't a
good component technology that can
cover broadband both on the receive and
transmit sides. There's commercial technology moving into the MMW regime for
multiple, diverse, narrowband applications, but having a wideband sensing detection, characterization and transmit
(countermeasure) capability over a broad
bandwidth is a needed technology."
In the RARE effort, ultra-wideband
(0.1 - 40 GHz), agile, reconfigurable RF
front-end transceiver chipsets capable
of sensing and countering RF-based
threat systems; cognitive systems that
can respond autonomously to unanticipated threats without new hardware
redesign and; timely availability of systems hardware by avoiding long development and procurement cycles for each
new threat have all been identified as
achievable areas for advancement.
"Here," says Dr. Hary, "the key thing
is recognizing the cat-and-mouse nature
of EW, where there is a continuous loop
of sensing, reacting, and developing a
countermeasure." With the proliferation
of threats and countermeasures based on
high-performance COTS electronics, however, the pace of this loop has increased
dramatically over the last few decades.
Dr. Hary points out that, currently, EW
systems are for the most part limited to
software and digital reconfiguration in
how they can rapidly deal with changing
threats. "We're still fundamentally limited
by the microwave front end, whereas, if we
can somehow be able to reconfigure this as
well, there would be a tremendous advantage in reacting to new threats and new
countermeasures." Harry also observes


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JED - June 2014

Table of Contents for the Digital Edition of JED - June 2014

The View From Here
Conferences Calendar
Courses Calendar
From the President
The Monitor
World Report
50 Years of Airborne SIGINT
ACE Program Lays Out Plans for New EW Capabilities
Technology Survey: Spectrum Analyzers
EW 101
NAWCWD Hosts 43rd Annual Collaborative Electronic Warfare Symposium
AOC News
Index of Advertisers
JED Quick Look
JED - June 2014 - cover1
JED - June 2014 - cover2
JED - June 2014 - 3
JED - June 2014 - 4
JED - June 2014 - 5
JED - June 2014 - The View From Here
JED - June 2014 - 7
JED - June 2014 - Conferences Calendar
JED - June 2014 - 9
JED - June 2014 - Courses Calendar
JED - June 2014 - 11
JED - June 2014 - From the President
JED - June 2014 - 13
JED - June 2014 - 14
JED - June 2014 - The Monitor
JED - June 2014 - 16
JED - June 2014 - 17
JED - June 2014 - 18
JED - June 2014 - 19
JED - June 2014 - World Report
JED - June 2014 - 21
JED - June 2014 - 50 Years of Airborne SIGINT
JED - June 2014 - 23
JED - June 2014 - 24
JED - June 2014 - 25
JED - June 2014 - 26
JED - June 2014 - 27
JED - June 2014 - 28
JED - June 2014 - 29
JED - June 2014 - 30
JED - June 2014 - 31
JED - June 2014 - 32
JED - June 2014 - ACE Program Lays Out Plans for New EW Capabilities
JED - June 2014 - 34
JED - June 2014 - 35
JED - June 2014 - 36
JED - June 2014 - Technology Survey: Spectrum Analyzers
JED - June 2014 - 38
JED - June 2014 - 39
JED - June 2014 - 40
JED - June 2014 - 41
JED - June 2014 - 42
JED - June 2014 - 43
JED - June 2014 - 44
JED - June 2014 - 45
JED - June 2014 - 46
JED - June 2014 - 47
JED - June 2014 - 48
JED - June 2014 - EW 101
JED - June 2014 - 50
JED - June 2014 - 51
JED - June 2014 - 52
JED - June 2014 - NAWCWD Hosts 43rd Annual Collaborative Electronic Warfare Symposium
JED - June 2014 - AOC News
JED - June 2014 - 55
JED - June 2014 - 56
JED - June 2014 - Index of Advertisers
JED - June 2014 - JED Quick Look
JED - June 2014 - cover3
JED - June 2014 - cover4
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