M W Cole - Storming Media

An Elegant Low-cost Materials Solution for Achieving Low Insertion Loss, Affordable Tunable Filters for Next Generation Mobile Communications Platforms

Apr-2009

18 pages

Authors: M W Cole; E Ngo; R J Tan; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE

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The effect ultraviolet (UV)-assisted annealing on the structural, dielectric, and insulating properties of barium strontium titanate (BST) thin films was investigated. The material properties of BST films, prepared by RF sputter deposition, annealed via conventional thermal annealing and UV-assisted thermal annealing process protocols were compared and evaluated. The x-ray diffraction results showed contracted lattice constants and enhanced crystallinity for the RF sputtered BST films annealed via the UV-assist treatment. Isothermal-temporal ...

Affordable OTM Phased Array Antennas: Design and Fabrication of Temperature Stable and Performance Consistent Phase Shifters

01-Nov-2006

9 pages

Authors: M W Cole; W D Nothwang; C Hubbard; E Ngo; S Hirsch; L A Coryell; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE

Electronically scanned phased array antennas (ESAs) provide the means for achieving high data rate, beyond line of sight, on-the-move (OTM) communications. The phase shifter is a key component of ESAs, and the Army's Communications Engineering Research and Development Center (CERDEC) has recently acknowledged BaSrTiO3 (BST) thin film technology as the premier candidate for achieving affordable high performance phase shifter elements. Unfortunately, there is concern that in practical applications the device ...