Hyper-environmental radome and the like

Claim 1

A STRONG, UNITARY RADOME, NOSE CONE 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 COMPOSED ESSENTIALLY AND VIRTUALLY HOMOGENEOUSLY OF PARTICLES OF REFRACTORY OXIDE BONDED TOGETHER BY A SMALL QUANTITY OF FRITTED MINERALS INCLUDING CLAY OF THE MONTMORILLONITE GROUP; THE PARTICLES OF REFRACTORY OXIDE BEING IN COMPACT, CLOSELY ADJACENT RELATION AT SAID INNER AND OUTER SURFACES TO FORM THIN DENSE LAYERS OF PREDETERMINED AND VIRTUALLY UNIFORM THICKNESS AT SAID SURFACES, SAID SURFACE 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 LESS THAN 9; THE OVERALLY THICKNESS OF SAID WALL BEING BETWEEN ABOUT 0.3 AND 0.7 OF THE FULL WAVE LENGTH OF THE ENERGY TO BE TRANSMITTED THROUGH THE WALL OF THE OBJECT, SAID LOW DENSITY WALL PORTION CONSTITUTING BETWEEN 70% AND 90% OF SAID OVERALL WALL THICKNESS.