| US 7,602,193 B1 | ||
| RF waveguide mode suppression in cavities used for measurement of dielectric properties | ||
| J. Mark Baird, Sandy, Utah (US); and Darren J. Corey, Salt Lake City, Utah (US) | ||
| Assigned to L-3 Communications Corporation, New York, N.Y. (US) | ||
| Filed on May 11, 2007, as Appl. No. 11/801,956. | ||
| Int. Cl. G01R 27/04 (2006.01); G01R 27/28 (2006.01) | ||
| U.S. Cl. 324—633 [324/636; 324/655] | 24 Claims |
| 1. A measurement system comprising:
sidewalls;
a first endplate;
a second endplate disposed opposite the first endplate so as to define a cavity bounded by the sidewalls, the first endplate
and the second endplate; and
first and second radio frequency (RF) coupling receptacles coupled to at least one of the sidewalls, the first endplate or
the second endplate, wherein the first and second RF coupling receptacles are configured to pass a RF signal through the cavity,
wherein the first endplate comprises a plurality of coplanar conducting loops disposed on a surface facing the second endplate,
wherein each loop of the plurality of conducting loops is electrically isolated from other loops of the plurality of conducting
loops,
wherein the second endplate comprises first and second regions, wherein the first region comprises a material that is substantially
non-lossy at frequencies of interest, and wherein the second region comprises a lossy material.
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