US 4,052,724 AGranted

Branching filter

AssigneeMitsubishi Denki Kabushiki Kaisha

InventorsYoshihiro Takeichi, Tsutomu Hashimoto, Fumio Takeda, Takashi Katagi

Life of this patent

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Abstract

A branching filter for branching two microwaves from waves having two microwaves and a plurality of milliwaves includes two groups of coupling holes fluidically connected to one or more band-pass filters and a branching waveguide, one group of coupling holes being arranged on the wall of the conical horn so as to be equiangularly disposed thereabout with a 90.degree. interval defined between adjacent coupling holes when, for example, four coupling holes, filters, and waveguides are employed in such group, while the second group of coupling holes, disposed axially downstream of the first group of holes by means of a predetermined distance, is similarly disposed about the horn although angularly offset with respect to the holes of the first group through means of an angle of 45.degree..

Claims6

Dependent claims

A branching filter for a wave having multi-frequency bands, comprising:

two groups of coupling holes each of which is respectively connected to band-pass filter means and a branching waveguide, the filter means connected to one of said groups of holes being different from the filter means connected to another one of said groups of holes so as to selectively filter and branch waves having a particular frequency band into said respective branching waveguides,
said one of said groups of said coupling holes being arranged on a wall of a conical horn with an equal angle of circumference of 90 degrees between adjacent holes of said one of said groups of said coupling holes, and
said another one of said groups of said coupling holes being arranged on said wall of said conical horn with predetermined angles being defined between adjacent holes of said another one of said groups of said coupling holes, each of said holes of said another one of said groups of said coupling holes also being interposed between and separated from said adjacent holes of said one of said groups of said coupling holes by predetermined angles of circumference therebetween.

Dependencies are inferred from the claim text.

Facts

Application: 05/723,654Filed 15 Sep 1976 · continuation in part
Priority: 20 Dec 1974
Granted: 4 Oct 1977
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H01P 1/2138
Combining or separating two or more different frequencies: using hollow waveguide filters
H01Q 5/35
For different propagation modes: using two or more simultaneously fed points
H01Q 5/45
Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed…: using…
H01Q 5/55
Feeding or matching arrangements for broad-band or multi-band operation: for horn or waveguide antennas