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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...
A quad-band microstrip-fed stubs-loaded frequency reconfigurable printed antenna for multiband operation is presented and designed on RO 3003 substrate. The quad-band modes are excited due to integrating three asymmetrical inverted L-stubs in series with vertical rectangular strip above ground plane and circular patch. The predicated impedance bandwidths of 130 MHz (2.35–2.48 GHz), 200 MHz (3.49–3...
The least erroneous knowledge on fault location in distribution system helps for restoration process, expedite maintenance and reduce power outage duration. A fault location method using probe power unit (PPU) in DC microgrid assumes that the natural frequency of the system is equal to damped resonant frequency of probe current. This assumption leads to prominent error in fault location calculation...
In this paper we propose a CPW fed U shaped reconfigurable antenna for cognitive radio application. The reconfigurability in frequency is obtained by connecting the switches in the basic antenna by use of pin diodes. By controlling the switches the antenna can be operated at different frequencies. The antenna is designed to resonate at different frequencies at UWB band and it is investigated by use...
This paper presents a novel single stage, single phase, common ground, transformer-less inverter for PV application. The ideal gain of the inverter is minus infinity to plus infinity. Converter is derived from intelligent circuit connections of Ćuk converter and Watkins-Johnson converter. The control to output transfer function contains right half plane (RHP) zeros, which leads to a limited closed...
Design of high quality factor micromechanical resonators depends critically on our understanding of energy losses in their oscillations. The of such structures depends on process induced prestress in the structural geometry, interaction with the external environment, and the encapsulation method. We study the dominant fluid interaction related losses, namely, the squeeze film damping and acoustic...
Design and performance of an ultra-wide band truncated rectangular monopole antenna with band-notched characteristics is presented in this paper. In the proposed antenna, split ring resonator (SRR) is etched inside the truncated rectangular patch of the monopole antenna to achieve band-notch operation. The achieved impedance bandwidth of antenna is from 2.43 GHz to 13.30 GHz, for VSWR < 2...
A wideband micro strip patch antenna is designed for satellite communication. It achieves multi-band functionality through the array technique. The proposed antenna generates circular polarization and good radiation efficiency. The implementation of array technique provides better efficiency. It is a 2×3 array pattern with Microstrip line feed. It operates about C and X bands efficiently.
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