Military applications will continue to grow and drive fundamental development of semiconductor technologies such as gallium nitride (GaN) and this was highlighted with product announcements during IMS 2012 reviewed in the Strategy Analytics Advanced Defense Systems (ADS) service report, “Defense Electronics Industry Review: June 2012.” Additionally, the report details significant defense industry news, including product announcements, milestones, contract activity and defense industry financial performance for the month of June.

Strategy Analytics’ breakfast session held in conjunction with Microwave Journal during IMS 2012 included participation from Cree, Nitronex, NXP, RFMD, TriQuint and UMS with the presentations serving as a platform to confirm the applicability of GaN to addressing communications, electronic warfare, and radar applications. The panelist presentations confirmed applicability of GaN to addressing EW, radar and communications applications, by highlighting products with some combination of high power, high efficiency and wide bandwidth performance. During the conference itself, there were also a number of product announcements showcasing GaN capabilities including Toshiba’s new X-band GaN hybrid IC (HIC) targeted at TRMs (transmit-receive modules) used in active electronically scanned array (AESA) and passive electronically scanned array (PESA) radar applications.

Eurosatory 2012 in Paris was also in June allowing defense companies to showcase new products and capabilities with a focus on the land and air domains. Elbit Systems Ltd announced the launch of the VWS radar, a new, continuous wave (CW) radar, specifically designed for Active Protection Systems (APS) to provides soft/hard protection for light or heavy armored vehicles. On the EW front, Netline launched a new, extremely small, lightweight, accurate jammers, such as the C-Guard HHJ and the PJP - Portable Jammer Pack – based on new exciter technology as well as using RF capabilities provided by semiconductor technologies such as GaN.

In communications systems, ITT Exelis upgraded its hand-held SpearNet radio with enhancements that further extend its capabilities with an emphasis on providing cellular-like mobility coupled with increased bandwidth throughputs to enable voice, video and data communications. Harris introduced the Falcon III RF-7800H wideband manpack, reportedly the world's smallest, lightest and fastest wideband HF radio as well as the next generation of the combat-proven Falcon III® RF-7800W High-Capacity Line-of-Sight radio. The company has also introduced a handheld variant – the RF-7800M – designed to connect dismounted warfighters to emerging wideband tactical networks.

Other system level activity during June also included systems that employ semiconductor technologies. Boeing and Raytheon received contracts related to AN/APG-79 AESA radar upgrades, while Northrop Grumman demonstrated the capabilities of the company's AN/AAQ-37 distributed aperture system (DAS) and AN/APG-81 AESA radar, both featured on the F-35.

All of these developments will continue to drive demand for RF technologies such as GaN. As these technologies mature, the boundaries around performance and applicability are also crystallising and over the course of IMS 2012 and more recently at Farnborough, it is clear that GaN is no longer seen as a TWT (traveling wave tube) killer by either side. Where there is a need for high power at high frequency without compromising efficiency, then TWT technologies from companies such as e2v Technologies, TMD Technologies, L-3 Communications Electron Technologies will continue to play a key role in defense systems. Indeed, there is potential for these technologies to complement each other especially in the growing trend towards MPMs which utilise mini-TWTs typically in conjunction with a solid-state driver amplifier. As with commercial markets, the military sector will find that these respective technologies as well as other technologies (both existing and emerging) are best utilised in complementary fashion rather than trying to hone in on one flavour of technology alone as the panacea for all future system and platform design.

Clients of the ADS service can read the full report here.

Also, don’t miss this month’s column in the Microwave Journal’s Military Microwaves.

See Defence iQ for more analysis on the defense industry, related news and events.

Asif

Air, sea, and land electronic warfare (ASLEW) is waged within the electromagnetic (EM) spectrum to both attack and defend against enemy personnel and equipment. Electronic Warfare (EW) uses the EM spectrum to attack and disable an enemy's sensors, data links, communications, and directed energy weapons while also denying enemy EW efforts, thus degrading the enemy's warfighting capabilities. Furthermore, EW readily lends itself to multi-domain warfare unlike physical weapons such as tanks, aircraft, and ships that are specific to a domain (air, sea, land) of combat.

This does mean that EW needs to be centrally planned and directed, and de-centrally executed with the various investments made by the different branches of the armed forces effectively applied in a coordinated fashion. US military branches are a good example of where this doctrine is already in use, but other nations are also recognizing the increasing importance of EW systems and putting strategies in place.

As part of these efforts, Strategy Analytics sees space communications systems playing a strategic role as an electronic warfare force multiplier. As electronic warfare becomes increasingly integrated and net-centric, and with the tighter integration of EW and cyber/information warfare (CIW) opening up another front, space communications assets will be pivotal in supporting net-centric capabilities across airborne, naval and ground systems as part of the electromagnetic battlefield management (EMBM) strategy.

The Advanced Defense Systems (ADS) service report, "Space Communications Systems and Electronic Warfare" serves as a quick introduction to this topic and ADS will be releasing a more in-depth strategic analysis of space communications systems  as used by US, allied, and select other military forces to augment ASLEW.

This will be followed by a series of reports covering EW systems demand across land, naval and air domains to include detailed component market analyses and forecasts.

Dr David Allstot from the University of Washington kick-started the 2010 IEEE Radio Frequency Integrated Circuits Symposium with a review of the challenges and ongoing research into CMOS power amplifiers for use in the cellular radio front-end. Highlighting the energy consumption and CO₂ emissions from cellular handset usage, Dr Allstot emphasized the need for more efficient PAs as continued motivation for development of CMOS PA technologies.  Research into CMOS PAs has been ongoing for around 20 years, with current designs achieveing around 1W power outputs and up to 60% PAE. The performance of typical power amplifier PAs including Class A, B and E were highlighted, and then put into context with the demands of current networks which place greater importance on PAs operating backed off from peak power with schemes such as 64QAM resulting in probability distributions that translate into actual efficiencies of only 5%.  Dr Allstot provided examples of digital PAs comprising multiple PA cells and power combining techniques that have been put forward to address these issues, and highlighted the potential for Class G power PAs that feature a hump-shaped curve with the first peak aligning with probability distribution curves of a 64QAM spectral signal and offering the potential for efficiencies as high as 24%.  While these results are promising, Strategy Analytics still sees a gap in performance capabilities between GaAs and CMOS PAs which is compounded by cellular handset requirements continuing to evolve. This translates into a moving target that places greater emphasis on linearity, efficiencies and peak-to-average ratios (PAR) and in our opinion will continue to favour the capabilities offered by compound semiconductor technologies.  Nevertheless, the pervasive nature of RF technology will open up doors for CMOS and SiGe PAs, while also continuing to provide growth the compound semiconductor technologies, and this was highlighted by the second plenary talk, given by Gregory Waters of Skyworks Solutions Inc.  Mr Waters provided an overview of how the growth in the cellular handset market has transformed the RF industry into a mainstream technology with future trends pointing to greater pervasive use of RF in multiple applications. Smartphones are leading the initial trends towards more complexity in the radio chain which translates into greater content and provides continued growth for the industry.  Video is the primary driver for the RF market moving forwards with social media driving demands for always-on connectivity. This in turn will translate into more RF content going into terminals to meet these needs. Skyworks estimated that average RF content has increased by around 2.5 to 4x the content required when delivering voice-only capabilities.  The different approaches in the cellular front-end to handle these growing needs were highlighted, from multiple PAs through broadband PAs able to tackle high-band and low-band RF chains, to solutions that will cover all bands through a converged solution. This will be coupled with techniques such as envelope tracking and digital predistortion to provide more linear, more efficient RF solutions.  The other key message from Skyworks was that RF technology will become even more pervasive in its application moving forwards, with embedded RF translating to multiple applications, examples including smart metering for utilities, vending machines and passive RF technology for tracking applications.  To serve market needs moving forwards, RF companies will need to continue developing a broad base of technologies that incorporate not only the RF, but also interconnects and packaging   Strategy Analytics sees this pervasiveness as a catalyst that will open doors for Si technologies while the growing complexity needed to serve the always-on connectivity will present continued opportunities for compound semiconductor technologies.