Abstract-For energy harvesting applications a new design of a coplanar waveguide (CPW) fed monopole antenna is presented. It covers almost all useful band ranges from 900 MHz-9.9 GHz (Radio, GSM, ISM, UWB bands). It also provides band reject characteristics for the range 3.1 GHz-5.6 GHz (HIPERLAN, C-Band, and W-LAN) to avoid interference from this range. The new design is based on the modification of coplanar waveguide (CPW) structure and optimizing the gap between patch and CPW ground for covering the ultra wideband (UWB) range and other useful ranges (Radio, GSM and ISM). Bandwidth enhancement and impedance matching for UWB range have been obtained by chamfering the corners, cutting two slots in CPW ground and dual stubs. The new design incorporates a parasitic patch above the antenna patch for tunning the desired band rejection. The entire design has been optimized at various stages during its evolution. The structure is compact in size 50×40×1.6 mm 3 . It may also be used for mobile, military and satellite applications.
Inter-facial processes and charge-transport mechanisms in a segmented resistor have been investigated using single- and double-layer resistive test structures. Microstructure studies of the cross section of the specimens supported by elemental mapping using energy- and wavelength-dispersive X-ray analysis show that, in dual-layer structures, RuO2 agglomerates in a thin region near the interface and the current flow takes place principally through this region. From the Arrhenius plots of the specimens combined with Mott's T1/4 law, it is found that the conduction mechanism at the junction of two cofired thick resistive films is governed by the mechanism of the lower-sheet-resistivity film.
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