Assertion: radome's layer | /r/HasAspect | low loss tangent
Facets:
Source sentences:
text: A strong, lightweight, unitary 'radome, nose cone, electromagnetic window and similar formed object adapted to effectively transmit high frequency energy and having the ability to withstand thermal shock comprising: a rigid contoured object including a wall having a generally convex outer surface and a generally concave inner surface, said wall being of virtually uniform overall thickness; said wall being com-posed essentially and virtually homogeneously of particles of refractory oxide bonded together by a small quantity of fired products of minerals including clay; the particles of refractory oxide being in compact, closely adjacent relation at said inner and outer surfaces to form thin dense layers having a dielectric constant of 9 and higher and a low loss tangent; the particles of refractory oxide in the wall portion between said surface layers being arranged and bonded together to form a uniformly porous structure of low apparent density having a predetermined dielectric constant of between about 2 and 5, the thickness of said low density centrally disposed wall portion being between about 0.4 and 0.6 of the full wave length of the energy to be transmitted through the wall of the object; the overall thickness of the wall being between about 0.3 and 0.7 of said full wave length.