The double chirped mirror DCM appeared to meet the need to compensate for the gain crystal dispersion of solid state lasers in a broad wavelength range. Compared to earlier dispersion compensation techniques, they enabled remarkable improvements in the field of generating ultra short pulses. When ultra broad band gain media are used inside laser cavities, cavity dispersion plays an important ro...

In the last years a lot of attention was paid to Multiple Antenna systems with Space-Time Coding (STC) combined with Ultra Wide Band (UWB) transceiver in order to evaluate if these two technology can be considered adequate candidates for next generation WLANs. Merging Ultra Wide Band signals with Multiple Antenna schemes allows us to achieve very high bit rate and error probability matched to Q...

Allocation of the unlicensed frequency band around 60 GHz by worldwide regulatory authorities has stimulated research for impulse based ultra wideband technology. It has the potential of offering multi-gigabit per second throughput for short range wireless systems. Ultra wide band impulse radio uses extremely short baseband pulses for transmission and reception. The role of designing ultra wide...

A compact rectangular printed antenna with dual band-notches is proposed for ultra-wideband (UWB) applications. The dual band-notch characteristics have been realized by etching one C-shaped parasitic element and rectangular split ring resonator above the ground plane. The proposed antenna can achieves a wide bandwidth from 2.9-11 GHz with the dual notched bands centred at 5.25 GHz and 5.8 GHz....

A newly designed printed slot antenna is presented that incorporates variable two band-notched functions for ultra-wideband (UWB) applications. The two band notches of this coplanar waveguide (CPW) fed antenna are achieved by an M-shaped slot (MSS) embedded in the radiating element and a C-shaped strip (CSS) close to ground plane, therefore two very narrow rejected properties in the wireless lo...

background: the aim of the present study was application of haemoglobin absorption spectroscopy as a distinguishing tool for identification of two haemoglobin types-hba and hbs. material and methods: millimolar absorptivities of normal adult haemoglobin (hba) and sickle cell haemoglobin (hbs) were monitored at ph values of 7.2 and 5.0, within the ultra violet and visible spectral range (250-650...

Band-notch characteristic has been of great interest recently to overcome the electromagnetic interference of Ultra-wideband systems (UWB) with other existing ones. In this paper, we present a novel microstrip-fed antenna with band rejection property appropriate for UWB applications. Band-notch characteristic has been achieved by adding a rectangular resonant element to the ground section. A pr...