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Researchers in Germany have proposed a technique for generation of UWB signals that uses direct modulation of semiconductor lasers and optical filtering. Their device is capable of generating both monocycle and doublet pulses and offers a simple, compact and low-cost combination of UWB and optical access networks.
A 3D printing technique for fabrication of frequency selective structures for built-up environments has been developed by researchers in the UK. The cores of the elements are fabricated using a material based on commercially available plaster, and so offer a straightforward approach to the control of electromagnetic wave propagation in buildings.
Inertia and bounce
A novel inertial micro-switch capable of prolonging contact time and reducing the contact-bouncing effect has been designed and manufactured by researchers in China. Solving an important problem that has plagued inertial sensors for several years, this design can be used in a wide range of applications such as accessories, automobiles and military systems.
Wide bandwidth and low insertion loss are important properties for millimetre wave systems, and researchers in China have presented a wideband, low loss millimetre-wave quasi-optical low-loss power divider based on a dipole antenna. The antenna array is inserted in the E-plane of a rectangular waveguide to implement the power-dividing function
A dual-band bandpass filter that can be used at two unlicensed bands, 60GHz and 77GHz, has been constructed on a GaAs substrate by researchers in Taiwan. The dual-band filter allows more flexibility in the selection of operational frequencies and the fractional bandwidth by adjusting the lengths of the two sets of resonators.