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A wideband/multiresonance monopole antenna with multiple notched stop bands is presented. A multiresonance characteristic 2.6–22 GHz is achieved by modifying ground plane and three notched stop bands at 3.36–4.11, 5.15–5.79, and 7.96–8.50 GHz are achieved by introducing three co-directional split ring resonators (SRRs) in the radiating patch. The individual notch frequency is controlled by the individual...
Design and analysis of an ultra-wide band antenna consisting extra radiating patch with bandwidth enhancement and band notch characteristic is presented. Antenna consists of an exciting rectangular patch on the front side and an extra radiating patch with π shaped slot on the backside of the substrate. By inserting a slot to the antenna, WLAN notched frequency band is achieved. A conceptual modal,...
This paper presents circular ring and square loop Band reject Frequency Selective Surfaces (FSSs) for dual band WiMax and single band WLAN applications. FSS consist of two square loops with four small square loops in back side & one square loop and circular ring with some slots in front side of the substrate. This FSS designed on the FR-4 dielectric substrate with a relative permittivity of 4...
A reconfigurable circular disc monopole UWB antenna with switchable two notched stop bands is presented. The antenna comprises a circular patch, 50 Ω microstrip feed line, partial ground plane with rectangular notch, and two U-shaped slots with folded arm. Predicated impedance bandwidth 2.78–12.8 GHz with dual notched stop bands 3.25–3.83 and 4.94–5.98 GHz are achieved for WiMAX and WLAN bands by...
School and College campuses face a perceived threat of violent crimes and require a realistic plan against unpredictable emergencies and disasters. Existing emergency systems (e.g., 911, campus-wide alerts) are quite useful, but provide delayed response (often tens of minutes) and do not utilize proximity or locality. There is a need to exploit proximity-based help for immediate response and to deter...
This paper presents the performance evaluation of hybrid network using RIP & IGRP routing protocols for different applications in low load campus network. In this network model, generic LANs models and WLANs are used. In this paper, a simulated environment is created where many applications are in use at a time and their mutual effects thereof. This network model is based on OPNET IT GURU...
We propose a model-based channel access mechanism for cognitive radio-enabled secondary network, which opportunistically uses the channel of an unslotted primary network when the channel is sensed idle. We have considered IEEE 802.11 WLAN as a de facto primary network operating in ISM band. Our study focuses on a single WLAN channel that is used by WLAN clients and a WLAN server for a mix of Email,...
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