Compact microwave filter with dielectric resonator

Details Compact microwave filter with dielectric resonator Compact microwave filter with dielectric resonator

1979-09-24

1980-12-23

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333209, 333223, 333227, H01P 710, H01P 120

Patent

active

042413222

ABSTRACT:
Compactness and substantially optimum electrical performance are realized in a microwave filter incorporating a housing (21, 22) including an interior surface that forms an enclosed cavity having planar cross sections substantially elliptical in shape (FIG. 3). At least one axis of each ellipse monotonically increases in length with perpendicular distance from a first surface (23) toward a second surface (24). A dielectric resonator (11) is positioned in a predetermined relationship within the cavity and at least two terminal members (30,35) extend from outside the housing (21,22) into the cavity. Electromagnetic coupling between the housing (21,22) and the dielectric resonator (11) is minimized to afford substantially optimum electrical performance of the microwave filter.

REFERENCES:
patent: 3840828 (1974-10-01), Linn, et al.
patent: 3938064 (1976-02-01), O'Bryan, Jr. et al.
patent: 4028652 (1977-06-01), Wakino et al.
patent: 4121181 (1978-10-01), Nishikawa et al.
patent: 4124830 (1978-11-01), Ren
patent: 4142164 (1979-02-01), Nishikawa et al.
patent: 4143344 (1979-03-01), Nishikawa et al.
Ehrlich, et al.-"Cell-Site Hardware", Bell System Technical Journal, vol. 58, No. 1, Jan. 1979; pp. 153, 174-182.

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