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Electronics

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Displaying 676 - 695 of 695

Adjustable tuning for planar millimeter-wave circuits

August 12, 1986
Author(s)
Dylan F. Williams, S E. Schwarz, J. A. Sedlacek, D J. Ehrlich
At millimeter wavelengths uncontrollable parasitics are of ten large enough to significantly degrade circuit performance when they are not compensated by adjustable elements. It is difficult to add adjustable elements to planar millimeter-wave circuits

High-Field Flux Pinning and the Strain Scaling Law

December 1, 1985
Author(s)
John (Jack) W. Ekin
The effects of strain on flux pinning in superconductors are discussed. Significant differences between the strain scaling law, temperature scaling law, and the flux-line-shearing model of Kramer are demonstrated. The strain scaling law is more general

A planar subharmonically-pumped 71 GHz receiver with integral feed antenna

November 12, 1985
Author(s)
Dylan F. Williams, S E. Schwarz
A planar, subharmonically-pumped, hybrid millimeter-wave receiver with integral antenna is described. Coplanar waveguide filters are used to isolate the ports and provide image enhancement. The integral planar antenna has 12 dB gain and is suited for use

Design and Performance of Coplanar Waveguide Bandpass Filters

July 1, 1983
Author(s)
Dylan F. Williams, S E. Schwarz
End-coupled resonator bandpass filters built in coplanar waveguide are investigated. The admittance inverter parameters of the coupling gaps between resonant sections are deduced from experiment, and bandpass filter design rules are developed. This allows

Temperature variation of SAW power flow angle

February 19, 1981
Author(s)
Dylan F. Williams, F Y. Cho
The power flow angle of surface acoustic waves in quartz not on a crystalline axis of symmetry is shown to vary rapidly with temperature. Experimental results and theoretical calculations are presented demonstrating the dependence of the acoustic power

Numerical Analysis of Doubly Rotated Cut SAW Devices

April 30, 1980
Author(s)
Dylan Williams, F Y. Cho
Results of a numerical study of the properties of surface acoustic waves (SAW) on doubly rotated cuts of alpha quartz are presented. First and second order TCF's have been calculated on a 10° x 10° x 10° grid spanning the range of angles (XY wlt) 0 to 3O°/
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