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Aerospace and Defense Technology Impact Service
Frost & Sullivan, Nov 2003
Better Tactical Systems to Simplify Communication
The U.S. military is looking to replace several multiple-radio systems dedicated to distinct wavelengths as they are bulky, complex, and require separate operators. Aerospace and defense divisions intend to simplify aeronautical communications by financing the development of digital tactical systems, which are compact, lightweight, and have modest power requirements. For instance, the all digital receiver (ADR) directly digitizes incoming radio frequency signals to provide greater support to signal processing in diverse military applications, while reducing the number of devices.
This research assesses the impact of new technology on the aerospace and defense industry. It explores leading tactical communications technologies ranging from those still being developed, through prototypes being field tested, to systems now deployed in field applications. The five broad technologies covered in this research service are - materials, communications, unmanned aerial vehicles, advanced displays, and missiles and munitions.
Heterojunction Bipolar Transistors Well Fitted for Military Operations
A promising tactical communications system is the light and compact heterojunction bipolar transistor (HBT), which can transmit information twice as fast as conventional transistors. A favored material in HBT design is indium phosphide (InP) wafer, a semiconductor that provides the required bandwidth to directly synthesize high-frequency signals digitally. Since InP HBTs can integrate different functions, electronic warfare nodes that require fewer discrete parts are being developed. These wafers are cost effective and can be deployed more easily.
Aluminium interconnects can be used instead of gold to make economical wafers in HBTs. Silicon-germanium (SiGe) also provides performance comparable to expensive gallium arsenide circuits, at much lower costs. SiGe films improve electron injection for better communication at the same level of base doping by having a base bandgap that is smaller than silicon. SiGe wireless communications is a classic dual-use technology that can be deployed in military tactical theater communications as well as commercial global grid applications, states the analyst.
Military Divisions Invest Heavily in Digital Communications for their Battlefield-friendly Features
The U.S. aerospace and defense industry has been involved in several digital communications product development programs because the adaptability of the devices and clarity of audio is of immense use in military operations. SanminaSCIs Defense and Aerospace Division has developed a modular tactical operations center inter-communication system that can enable both voice and data transmission. Meanwhile, the U.S. Defense Advanced Research Projects Agency has commissioned Vitesse to upgrade its VIP-2TM InP HBT technology for communications circuitry.
The HBT technologys ability to integrate functions of several discrete components in one chip can enhance system design, notes the analyst. InP HBT technology can provide more secure communication links by using a faster circuit than the enemy, which will distort the latters audio if they tune in to the same frequency. By performing some special processing steps, the radiation hardness of the chips can also be enhanced, allowing them to be used in satellite systems.
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