Results 81 to 90 of about 19,827 (295)

Study on effect of rectangular DMS and DGS on 4 and 8 elements rectangular microstrip linear array antenna

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
In this experimental study a novel design has been developed to improve the antenna parameters in terms of impedance bandwidth and radiation properties. A 4-element rectangular array antenna (refereed as antenna 1) operating in the range of 10 to 16 GHz ...
S L Mallikarjun, P M Hadalgi, P V Hunagund   +2 more
doaj   +1 more source

Design and analysis of defected ground structure transformer for dual-band antenna

The Journal of Engineering, 2014
This study presents a novel dual-band antenna design methodology utilising a dual-frequency impedance transformer with defected ground structure (DGS).
Wai-Wa Choi, Ka Fai Chang, Chon Chio Leong, Pedro Cheong, Kam Weng Tam   +4 more
doaj   +1 more source

Investigation of Compact Low Pass Filter with Sharp Cut–Off using Metamaterial [PDF]

, 2013
In this paper a new compact microstrip Bessel low pass filter (LPF) is experimentally validated using complementary split ring resonator (CSRR) which has sharper cut-off and improved spurious band suppression characteristics. The Richard’s transformation
Annaram, K., Nithya, S.
core   +1 more source

Filter Designs Based on Defected Ground Structures

, 2022
This chapter concentrates on the filter structures using Defected Ground Structures (DGS). Initially, this chapter discusses the limitations of Electromagnetic Band Gap (EBG) structures and the development of DGS structure from EBG structure. DGS is an area of increasing interest in EBG technology.
openaire   +2 more sources

High Q defected ground structures in grounded coplanar waveguide

Electronics Letters, 2012
The correlation between the placement of spiral defected ground structures in each ground plane of a grounded coplanar waveguide and the corresponding frequency response are investigated. S-parameters and current density plots from an EM-based simulation study are examined to understand this relationship.
D.B. Schlieter, R.M. Henderson
openaire   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Ab-initio study of oxygen vacancies in alpha-quartz

, 1997
Extrinsic levels, formation energies, and relaxation geometries are calculated ab initio for oxygen vacancies in alpha-quartz SiO2. The vacancy is found to be thermodynamically stable in the charge states Q=+3, Q=0, Q=--2, and Q=-3.
Allan, Baldereschi, Boero, C.M. Carbonaro, Ceperley, DiStefano, Dreizler, Griscom, Griscom, Halliburton, King-Smith, Liu, Nishikawa, Perdew, Pickett, Rudra, S. Massidda, Sarnthein, Scherz, Silsbee, Snyder, Vanderbilt, Vincenzo Fiorentini, Warren, Weeks   +24 more
core   +1 more source

An Overview of Defected Ground Structure with Practical Application of Defected Ground Structure Bandpass Filter in Energy Harvester Circuit

Research Journal of Applied Sciences, Engineering and Technology, 2014
The aim of the study is to practically implement the Defected Ground Structure (DGS) based microstrip bandpass filter in an energy harvester circuit. DGS is widely used to bring about an enhancement in the characteristics of microwave circuits. The study of DGS is derived from the concept of Photonic/electromagnetic Band Gap (PBG) structures but it is ...
M.T. Khan, M.A. Zakariya, Z. Baharudin, R. Ibrahim, S.S.B. Hong, J.J. Adz   +5 more
openaire   +1 more source

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

Compact Defected Ground Structure Microstrip Patch Antenna for Wi-Fi Applications

Acta Technica Jaurinensis
In recent years microstrip patch antennas having minute size is an exciting topic for many researchers and design engineers. In this paper a novel miniaturized microstrip patch antenna for Wi-Fi applications is proposed.
Dipak Omprakash Sakle, Manish Deshmukh
doaj   +1 more source