Devices using low loss dielectric material
AssigneeBell Telephone Laboratories, Incorporated
InventorsHenry Miles O'Bryan, Jr., James Kevin Pluorde, John Thomson, Jr.
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Abstract
Devices are described which utilize a low loss dielectric material. This dielectric material is unique in that it combines low dielectric loss with a high and temperature-stable dielectric constant. The material is made up of BaO and TiO.sub.2 and corresponds closely in composition to the compound Ba.sub.2 Ti.sub.9 O.sub.20. Devices utilizing this material are useful at a variety of frequencies, but are particularly advantageous in the microwave region above 0.5 GHz.
Claims10
An apparatus for processing microwave electrical energy comprising a dielectric material for interaction with the microwave electrical energy a means for introducing microwave electrical energy to the dielectric material and a conducting member to contain the microwave electrical energy in the apparatus characterized in that the dielectric material consists essentially of a composition made up of ingredients that yields 18.0 - 19.0 mole percent divalent metal oxide remainder tetravalent metal oxide in which of the total amount of divalent metal oxide 0 - 0.4 mole percent is a metal oxide other than BaO, remainder BaO and of the total amount of tetravalent metal oxide 0 - 7 mole percent is metal oxide other than TiO.sub.2, remainder TiO.sub.2.
Dependencies are inferred from the claim text.