发明名称 |
Thermoplastic syntactic foam waffle absorber |
摘要 |
The microwave absorption performance of a fiber loaded thermoplastic syntactic material is improved by geometrically reshaping the surface into a waffle shape. Starting with a fiber loaded version of thermoplastic syntactic foam, the front face geometry is then modified. Typically, the angle and frequency response is a function of both the front face angle and the skin thickness. These effects are minimized in this concept by using a pyramidal surface in which the field enters the material normal to at least one surface at almost all incident angles. The attenuation is over 20 dB, from S through Ku bands, over a broad angle range of up to 75 degrees off normal. An added benefit is that this system has a rigidity that is suitable for many structural applications.
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申请公布号 |
US5844518(A) |
申请公布日期 |
1998.12.01 |
申请号 |
US19970799916 |
申请日期 |
1997.02.13 |
申请人 |
MCDONNELL DOUGLAS HELICOPTER CORP. |
发明人 |
BERG, DONALD J.;MENTZER, CARL A.;BROOKER, DAVID A.;SAPLETAL, GREGORY J. |
分类号 |
H01Q17/00;(IPC1-7):H01Q17/00 |
主分类号 |
H01Q17/00 |
代理机构 |
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