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This paper proposes a simple and novel switchable microwave filter. The proposed filter can easily be switched between high pass and low pass responses. The filter uses a structure which can be easily switched. The high pass filter uses an interdigital structure and the low pass filter uses the hairpins that are mounted on the interdigital structure. The filter is reconfigurable and small in size...
In this paper an ultra wideband bandpass filter with reconfigurable notches has been presented. It consists of a reconfigurable E to C shaped resonator centrally loaded on a multiple mode resonator (MMR). The MMR is constructed using stepped impedance resonator. Two notch frequencies are created by using reconfigurable E to C shaped resonator in order to reject these two interfering frequencies. Reconfigurability...
A compact dualband bandpass-to-bandstop tunable filter based on short stub loaded stepped impedance resonators is designed. It uses pin diode for bandpass-to-bandstop filter transformation and varactor diodes for tuning of the center frequency. The filter is designed on Taconic RF-35 substrate to obtain two close dualbands with tuning of center frequencies in the range 1.66–1.88GHz and 1.98–2.29GHz...
An attempt is made to develop and carry out the performance evaluation of the different Image Denoising Techniques on the images. This paper discusses the improvement of the recent image denoising techniques from the traditional techniques. The improved denoising filters, succeeded by the median filter are taken into consideration and the improvement of the median filter and its performance parameter...
Wireless Mesh Networks (WMNs) consist of mesh clients and mesh routers, where laptops, cell phones and sensor nodes are mesh clients, while mesh routers with minimal mobility are used for data forwarding. In this paper we focus on the improvement of wireless mesh network performance using smart antenna, and in particular, switched beam directional antennas. We have used STDMA(Spatial Time Division...
The last few years have experienced a high growth rate in research area of wireless mesh networks (WMNs). The attractive characteristics of WMN are self-organize and self-configure, low set-up/installation costs, simpler maintenance tasks, and service coverage with high reliability and fault-tolerance. WMN also provides their integration with existing wireless networks such as cellular networks, WLANs,...
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