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Chiral Composites as an Absorber or Component

chiralcomp.jpg (75238 bytes)Problem: Compliance Labs Inc. of Middlefield, Ohio requested Wright Technology Network (WTN) assistance with radio frequency emissions. Compliance Labs was installing an anechoic chamber to test electronic equipment for spurious radio frequency emissions. The chamber is designed to satisfy European requirements and it was exhibiting problems at certain frequencies.

Solution: Compliance Lab's solution was to install magnetic ferrite radar absorbing materials which were effective, but fairly costly. The company had read of a new magnetic absorber made of chiral composites. Chiral composites are composed of molecules of a certain structural configuration having the property that none of the molecules are symmetrical with their mirror images. It is hypothesized that such molecules will result in materials which are more absorbing and less expensive than current ferrite absorbers. The company requested WTN comments and recommendations.

Comments and Recommendations:

  • WTN reviewed the two articles the company had read concerning absorbers made from chiral composites.
  • WTN determined that chiral composites would not solve Compliance Lab's problems.
  • The use of chiral composites to make absorbers appears to be at an early stage of development.
  • The usefulness of chiral composites as an absorber or component of an absorber has not been established.
  • It is WTN's view that chiral components will not achieve satisfactory magnetic loss.

Current Status:

  • WTN provided feedback to Compliance Lab's Inc. request within four days.
  • Compliance Labs Inc. followed WTN's recommendation and installed the more costly ferrite magnetic materials.
If you have any questions about this Technical Assistance Project or are interested in getting more information about Wright Technology Network and technology transfer, please contact Jim Singer (937) 253-0217 or crada@wtn.org.

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