1. Nelson Research, Inc. 2142 – N. 88 th St. Seattle, WA. 98103 USA 206-498-9447 Craigmail @ aol.com Microwave NDE Test Fixture Examples Craig E. Nelson – Consultant Engineer

2. Nelson Research, Inc. 2142 – N. 88 th St. Seattle, WA. 98103 USA 206-498-9447 Craigmail @ aol.com When I got interested in microwave non-destructive and more-or-less non-contacting testing of porous silicon, I began to make up a variety of suitable test fixtures. These devices were assembled from bits and pieces of microwave hardware that were obtained piecemeal over time. Despite the home-brew nature of these devices, they worked fairly well.

3. Nelson Research, Inc. 2142 – N. 88 th St. Seattle, WA. 98103 USA 206-498-9447 Craigmail @ aol.com X Band (8-12 GHz) Test Fixture for Planar DUT Samples Waveguide Transition Slide Screw Tuner 3 Port Circulator Tuned Diode Detector Aperture Table for Test Sample E Bend

4. Nelson Research, Inc. 2142 – N. 88 th St. Seattle, WA. 98103 USA 206-498-9447 Craigmail @ aol.com X Band (8-12 GHz) Test Fixture for Planar DUT Samples Waveguide Transition Aperture Table for Test Sample 10 dB Bidirectional Coupler H Bend

5. Nelson Research, Inc. 2142 – N. 88 th St. Seattle, WA. 98103 USA 206-498-9447 Craigmail @ aol.com Demountable 1 GHz Cavity Resonator with Sub-Wavelength Sensing Aperture Cylindrical Cavity Wall Sensing Aperture Small Cavity Excitation loop Cavity Base Assembly Cavity Top Plate

6. Nelson Research, Inc. 2142 – N. 88 th St. Seattle, WA. 98103 USA 206-498-9447 Craigmail @ aol.com Collection of Broadband, Small Aperture Coaxial Hard-line Microwave Sensors Milled Aperture Aperture Table

7. Nelson Research, Inc. 2142 – N. 88 th St. Seattle, WA. 98103 USA 206-498-9447 Craigmail @ aol.com Summary and Conclusions An interesting variety of practical microwave NDE Microwave Test Fixtures have been presented