Temperature compensated dielectric resonators

Claim 2

A DIELECTRIC RESONATOR COMPRISING A FIRST MEMBER HAVING A HIGHDIELECTRIC CONSTANT, A HIGH Q, AND A NEGATIVE RATE OF CHANGE OF DIELECTRIC CONSTANT WITH TEMPERATURE OVER SAID FREQUENCY RANGE, SAID FIRST MEMBER INCLUDING A PARAELECTRIC MATERIAL; A SECOND MEMBER HAVING A HIGH DIELECTRIC CONSTANT, A HIGH Q, AND A POSITIVE RATE OF CHANGE OF DIELECTRIC CONSTANT WITH TEMPERATURE OVER SAID FREQUENCY RANGE, SAID SECOND MEMBER COMPRISING LITAO3, SAID FIRST AND SECOND MEMBERS BEING ARRANGED TO FORM A COMPOSITE RESONATOR STRUCTURE HAVING A HIGH EFFECTIVE DIELECTRIC CONSTANT, A HIGH EFFECTIVE Q AND A RATE OF CHANGE OF SAID EFFECTIVE DIELECTRIC CONSTANT WITH TEMPERATURE WHICH IS SUBSTANTIALLY LOW OVER SAID FREQUENCY RANGE, SAID SECOND MEMBER BEING POLARIZED IN A DIRECTION PARALLEL TO THE OPTICAL AXIS THEREOF.

Claim 3

A dielectric resonator comprising a first member having a high dielectric constant, a high Q, and a negative rate of change of dielectric constant with temperature over said frequency range, said first member including a paraelectric material; a second member having a high dielectric constant, a high Q, and a positive rate of change of dielectric constant with temperature over said frequency range, said second member comprising LiTaO3; said first and second members being arranged to form a composite resonator structure having a high effective dielectric constant, a high effective Q and a rate of change of said effective dielectric constant with temperature which is substantially low over said frequency range, in which: said LiTaO3 member comprises two solid portions, said portions being of equal length and having similar cross sections normal to their lengths having the shape of segments of a circle, each of said portions being arranged with a plane rectangular surface parallel to its length facing but separate from a plane rectangular surface parallel the length of the other portion and said paraelectric member is disposed in the region between the rectangular surfaces of said two portions and has a thickness equal to the separation between said portions, and in which said second member has its optical axis and is polarized parallel to the lengths of said portions.

Claim 4

A dielectric resonator comprising a first member having a high dielectric constant, a high Q, and a negative rate of change of dielectric constant with temperature over said frequency range, said first member including a paraelectric material; a second member having a high dielectric constant, a high Q, and a positive rate of change of dielectric constant with temperature over said frequency range, said second member comprising LiTaO3; said first and second members being arranged to form a composite resonator structure having a high effective dielectric constant, a high effective Q and a rate of change of said effective dielectric constant with temperature which is substantially low over said frequency range, in which: said LiTaO3 member comprises two solid portions, said portions being of equal length and having similar cross sections normal to their lengths having the shape of segments of a circle, each of said portions being arranged with a plane rectangular surface parallel to its length facing but separate from a plane rectangular surface parallel the length of the other portion and said paraelectric member is disposed in the region between the rectangular surfaces of said two portions and has a thickness equal to the separation between said portions, and in which said second member has its optical axis and is polarized parallel to the lengths of said portions.