As we know that the conventional filter synthesis procedure is adequate only for the relatively narrow band filters and is not suitable for the Wideband and Ultra wideband filters .Therefore we are intend to design a Ultra Wideband filter. In this study a compact Ultra Wide Band pass filter consisting of quarter wave resonant conductor like micro strip lines is proposed to design. We have to in...

We proposed an ultra-broadband reflective metamaterial with controlling the scattering electromagnetic fields based on a polarization convertor. The unit cell of the polarization convertor was composed of a three layers substrate with double metallic split-rings structure and a metal ground plane. The proposed polarization convertor and that with rotation angle of 90 deg had been employed as th...

We describe preliminary results from an ultra-sensitive, spectroscopic emission-line survey and illustrate the challenges inherent in identifying high-redshift Lyα emitters. Our multi-slit windows technique complements other types of emission-line surveys. Narrowband imaging surveys cover large areas of sky but only detect much brighter objects. Longslit spectra taken along cluster caustics yie...

We describe preliminary results from an ultra-sensitive, spectroscopic emission-line survey and illustrate the challenges inherent in identifying high-redshift Lyα emitters. Our multi-slit windows technique complements other types of emission-line surveys. Narrowband imaging surveys cover large areas of sky but only detect much brighter objects. Longslit spectra taken along cluster caustics yie...

This paper presents a top-hat sleeve monopole antenna for ultra-wideband (UWB) applications. The proposed antenna comprises a stem, a dielectric coat, and a top hat sleeve. A modal expansion technique used in cylindrical coordinate system is applied to study the impedance and radiation characteristics of the antenna. Influences of varying parameters of the antenna on impedance matching and radi...

Inspired by the white beetle of the genus Cyphochilus, we fabricate ultra-thin, porous PMMA films by foaming with CO2 saturation. Optimising pore diameter and fraction in terms of broad-band reflectance results in very thin films with exceptional whiteness. Already films with 60 µm-thick scattering layer feature a whiteness with a reflectance of 90%. Even 9 µm thin scattering layers appear whit...

We present the design and simulation of an ultra-compact polarization beam splitter (PBS) by combining a photonic crystal (PhC) multimode waveguide and an internal PhC section. The PhC multimode waveguide is designed to collect the powers reflected by or transmitted through the internal PhC structure which serves as a polarization sensitive scatterer. Plane wave expansion (PWE) method is used t...

This paper present the design and performance of a microstrip fed circular patch antenna with defected ground plane. The overall size of antenna is 35mm × 30 mm × 1.59 mm. The proposed antenna is simulated by applying CST Microwave Studio simulator. This antenna provides broad impedance bandwidth of 2.70GHz (2.30 GHz – 5.01 GHz) with flat gain (close to 3dBi) in the desired frequency range. Thi...

1 KIM, D.I., and YANG. G.S.: 'Broad-band design of improved hyhridring 3-dB directional coupler', IEEE Trans., 1982, MlT-30, pp. 2W2046 2 KIM, D.I., and YANG. G.s.: 'Design of new hybrid-ring directional coupler using N8 or N6 sections', IEEE Trans.. 1991, MlT-39, pp. 1179-1783 3 COUPU, J.P., PEDEN. A., and PERSON, c.: 'Analysis and design of ultra miniature hybrid ring directional coupler', Pr...

---------------------------------------------------------------------***--------------------------------------------------------------------Abstract – A compact microstrip feed multiband monopole antenna for Bluetooth (2.4-2.48 GHz), Ultra Wide Band (UWB) (3.1-10.6GHz), X-band (8-12 GHz) and Ku band (12-18 GHz) applications is suggested. The basic antenna structure consists of a rectangular pat...