Dielectric resonator filter

Details Dielectric resonator filter Dielectric resonator filter

1989-05-25

1990-10-16

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

3332191, 333235, H01P 120, H01P 710

Patent

active

049638416

ABSTRACT:
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.times.10.sup.-8 G.sup.-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.

REFERENCES:
patent: 4019161 (1977-04-01), Kimura et al.
patent: 4477788 (1984-10-01), Collinet et al.
patent: 4484162 (1984-11-01), Kamada et al.
patent: 4630012 (1986-12-01), Fuller et al.
patent: 4661790 (1987-04-01), Gannon et al.
patent: 4686496 (1987-08-01), Synett et al.
patent: 4706052 (1987-11-01), Hattori et al.
D. Kajfez and P. Guillon, Dielectric Resonators, Norwood, MA: Artech House, Inc., 1986, pp. 9-15 and 26-27.

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