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In the drive for the development of wideband array antennas for military applications, a well designed balun is essential to achieve overall antenna performance. However, for balanced antenna arrays to be driven effectively, antiphase element feeds are required at the correct impedance over multiple octaves. This paper summarises balun design options in microstrip and stripline for use with highly...
The WiTNESSS (Wireless Technology for Novel Enhancement of Systems and Structures Serviceability) programme aims to investigate the feasibility of implementing wireless networks for the purposes of data transfer within air vehicles. Two specific cases were considered, that of the transfer of health monitoring data from sensors distributed along the wing of a civil airliner to the fuselage, and for...
In the storage and materials handling industry, semi-rigid joint behaviour has been used for many years when evaluating the load carrying capability of beams, and the stability of unbraced frameworks. However, less research work has been conducted on the overall frame behaviour of semi-rigid unbraced frameworks. The structural stability action is akin to that of a shell in so far as it exhibits...
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