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The patterns of the UWB antenna are important in pulse-based UWB communication system. The relation between the antenna radiation patterns with the frequency of the UWB antenna is less studied today. The frequency dependency of the typical UWB antenna radiation patterns are simulated and measured in this paper. The patterns' frequency dependency is related to the current edge effect in the UWB antenna...
The triangular wavelet (sinuquotient) is an improved wavelet-based pulse design for ultra wideband (UWB) system. This paper has discussed the application of UWB in the time-domain simulation. The frequency-domain and time-domain expressions of sinuquotient are very simple and are suit to time-domain simulation. It simplifies processing steps such as transfer functions and receiving waveforms. The...
We have developed a 1 times 4 wideband array structure for multiple wireless applications. The utilized single element is a wide-slot antenna and has demonstrated ultra-wideband operation characteristics. The proposed antenna system associated with feeding network and antenna elements can be integrated in a single substrate. Consequently, such a design is with low fabrication and assembly cost and...
It's important to establish an effective UWB indoor wave propagation model for designing a system. In this paper, we develop a 3-D UWB channel model using the ray tracing method in the time domain, based on ray mechanisms of geometrical optics (GO) and uniform geometrical theory of diffraction (UTD) in the time domain. According to the simulation results for an in-home channel, the following conclusions...
A novel band-notched ultra-wideband wide-slot antenna fed with a microstrip-line is presented. The antenna is composed of a circular microstrip patch and a semicircular arc cut on the ground of the microstrip line. By embedding a simple U-slot in the circular microstrip patch, an ultra-wideband (UWB, 3.1-10.6 GHz) operation with a notched frequency band can be obtained. The U-slot has a length of...
In this paper, we present a novel method called PSO to design the coupled transmission line filter for UWB system. After detailed theoretical analysis and numerical simulation, parameters of layout for UWB coupled transmission line filter are given. Then, it was implemented on PCB. The simulation and measured results showed that, as a kind of novel optimization method, PSO is proven to be very effective...
In this paper, a novel UWB signal-generating method is proposed, which is based on the extended trigonometric function wavelet-Sinuquotient. Different from the conventional trigonometric function wavelet, the paper gives sin(omegax)/x and (1-cosomegax)/x as a novel wavelet-Sinuquotient. The paper analyzes the characteristics of the Sinuquotient, and discusses it as a new tool to deal with the UWB...
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