Four dielectric materials were tested; that is, silicon, Teflon, beryllia
, and gallium arsenide were examined to show electromagnetic propagation in a nonuniform material at 10 GHz and the results are shown in Figure 11.
Figure 1(a) shows the three-dimensional model of the novel slotted helix SWS, which consists of a slotted helix tape, three Beryllia
support rods and a stainless steel shell.
The plates are commonly made of alumina, but when large lateral heat transfer is required, higher thermal conductivity materials such as beryllia
and aluminum nitride are desired.
Construction material consists of either an alumina or beryllia
body with a proprietary resistor element for optimum performance.
Some data are presented in Appendix B of a 1/8 inch G-10 substrate and a thick disk of beryllia
. The rexolite data serve as a rough validation as rexolite is a familiar material.
Inc; 973-248-8080 www.americanberyllia.com
Another composite material of interest is beryllia
, particle-reinforced beryllium.
The compound bonds to alumina, porcelain, beryllia
, ceramics, glass, plastics, laminates, and metals.
In addition glass, ceramic, beryllia
, zirconia, and quartz are available, as well.
The helices are supported by three beryllia
support rods on which "vanes" are deposited by conventional low-cost thin-film sputtering and etching techniques, thereby precision shaping the required dispersions of the circuits at will.