초록 ▼

A dielectric resonator filter suitable for use at L-band includes a puck-shaped dielectric resonator attached directly to a dielectric substrate which is bonded to the cavity base in order to decrease vibration sensitivity while retaining a relatively high loaded Q of the dielectric resonator filter

A dielectric resonator filter suitable for use at L-band includes a puck-shaped dielectric resonator attached directly to a dielectric substrate which is bonded to the cavity base in order to decrease vibration sensitivity while retaining a relatively high loaded Q of the dielectric resonator filter. The high value of Q is attained by the use of a low loss dielectric substrate with a dielectric constant sufficiently high that the electrical dimensions of the cavity approximate the free space or optimum model wherein the resonator is positioned at the center of the cavity. The disclosure describes a dielectric resonator filter having a loaded Q in excess of 6500 at 1.538 GHz with an insertion loss of 6 db, while maintaining a vibration sensitivity of 2.2×10-8 G-1. An arcuate segmented line comprising a plurality of tracks used as a coupling structure permits individual selection for each filter of the coupling, while not degrading the loaded Q value or the vibration performance.

대표청구항 ▼

A dielectric resonator filter comprising: an electrically-conductive housing which defines a cavity therein; a dielectric substrate bonded to an inner surface of said housing; terminal means coupled through said housing onto said dielectric substrate for transferring energy at a predetermined freque

A dielectric resonator filter comprising: an electrically-conductive housing which defines a cavity therein; a dielectric substrate bonded to an inner surface of said housing; terminal means coupled through said housing onto said dielectric substrate for transferring energy at a predetermined frequency into and out of said filter; a coupling structure on a surface of said dielectric substrate, said coupling structure coupled at one end thereof to said terminal means, said coupling structure comprising a plurality of electrically-conductive tracks forming an arcuate segmented line, said arcuate segmented line being substantially concentric with the center of said dielectric substrate; and a dielectric resonator bonded directly to said dielectric substrate at a predetermined position with respect to the cavity walls of said housing, wherein the bonding of said resonator to said substrate and said substrate to said housing occurs at elevated pressure to minimize the spacings therebetween.