Waveguide type ortho mode transducer

• US 20040246069A1
• Filed: 10/21/2003
• Published: 12/09/2004
• Est. Priority Date: 03/20/2002
• Status: Active Grant

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Miyazaki, Moriyasu, Yoneda, Naofumi, Horie, Toshiyuki, Aramaki, Yoji, Tumura, Akira
• Granted Patent: US 7,019,603 B2
• Time in Patent Office: Days
• US Class Current: 333/125
• CPC Class Codes: H01P 1/161 sustaining two independent orthogonal modes, e.g. orthomode transducer combining or separating polarisations and frequencies H01P1/2131
• CPC Class Codes: H01P 11/002 Manufacturing hollow waveguides

Abstract

An object of the present invention is to obtain a waveguide type polarizer, which enables miniaturization thereof, shortening of an axis, and broad band promotion, and which has high performance. In order to attain the object, the waveguide type polarizer includes: a first rectangular main waveguide 1; first to fourth rectangular branching waveguides 2a to 2d branching perpendicularly to the first rectangular main waveguide 1; a short-circuit plate 3 connected to one terminal of the first rectangular main waveguide 1; a metallic block 4 provided on the short-circuit plate 3; a rectangular waveguide step 5 connected to the other terminal of the first rectangular main waveguide 1; and a second rectangular main waveguide 6 connected to the rectangular waveguide step 5.

Claims

1. A waveguide type polarizer, comprising:

a first rectangular main waveguide;

first to fourth rectangular branching waveguides branching perpendicularly to the first rectangular main waveguide;

a short-circuit plate connected to one terminal of the first rectangular main waveguide;

a metallic projection provided on the short-circuit plate;

a rectangular waveguide step connected to the other terminal of the first rectangular main waveguide; and

a second rectangular main waveguide connected to the rectangular waveguide step.

2. A waveguide type polarizer according to claim 1, characterized in that:

an opening diameter of the rectangular waveguide step is increased toward a branch portion of the first rectangular main waveguide for the first to fourth rectangular branching waveguides.

3. A waveguide type polarizer according to claim 1, characterized in that:

an opening diameter of the rectangular waveguide step is decreased toward a branch portion of the first rectangular main waveguide for the first to fourth rectangular branching waveguides.

5. A waveguide type polarizer according to claim 3, characterized by further comprising:

a circular-rectangular waveguide step connected to the second rectangular main waveguide; and

a circular main waveguide connected to the circular-rectangular waveguide step.

6. A waveguide type polarizer according to claim 1, characterized in that:

the metallic projection includes a metallic block having a square pyramid-like, step-like, or arcuate cutout.

7. A waveguide type polarizer according to claim 1, characterized in that:

the metallic projection includes metallic thin plates each having an arcuate, linear, or step-like cutout, which perpendicularly intersect each other.

8. A waveguide type polarizer according to claim 1, characterized by further comprising:

a first rectangular waveguide multistage transformer connected to the first rectangular branching waveguide and having a curved tube axis;

a second rectangular waveguide multistage transformer connected to the second rectangular branching waveguide and having a curved tube axis;

a first rectangular waveguide E-plane T-junction connected to the first and second rectangular waveguide multistage transformers;

a third rectangular waveguide multistage transformer connected to the third rectangular branching waveguide and having a curved tube axis;

a fourth rectangular waveguide multistage transformer connected to the fourth rectangular branching waveguide and having a curved tube axis; and

a second rectangular waveguide E-plane T-junction connected to the third and fourth rectangular branching waveguides.

9. A waveguide type polarizer according to claim 8, characterized in that:

the first and second rectangular main waveguides, the first to fourth rectangular branching waveguides, the first to fourth rectangular waveguide multistage transformers, the first and second rectangular waveguide E-plane T-junctions, the short-circuit plate, the metallic projection, and the rectangular waveguide step are constructed by combining a plurality of digging-processed metallic blocks with each other.

4. A waveguide type polarizer, comprising:

a first rectangular main waveguide;

first to fourth rectangular branching waveguides branching perpendicularly to the first rectangular main waveguide;

a short-circuit plate connected to one terminal of the first rectangular main waveguide;

a metallic projection provided on the short-circuit plate;

a circular-rectangular waveguide step connected to the other terminal of the first rectangular main waveguide; and

a circular main waveguide connected to the circular-rectangular waveguide step.

10. A waveguide type polarizer, comprising:

a first rectangular main waveguide;

first and second rectangular branching waveguides branching perpendicularly to the first rectangular main waveguide;

first and second conductor thin plates which are mounted in a pair in symmetrical positions within the first rectangular main waveguide;

a rectangular waveguide step which is connected to the other terminal of the first rectangular main waveguide and has an opening diameter that is decreased toward a branch portion of the first rectangular main waveguide for the first and second rectangular branching waveguides; and

a second rectangular main waveguide connected to the rectangular waveguide step.

11. A waveguide type polarizer according to claim 10, characterized in that:

the conductor thin plates are thin plates each having symmetrically arcuate, linear, or step-like cutouts.

12. A waveguide type polarizer according to claim 10, characterized in that:

for the first and second rectangular branching waveguides, first and second group of metallic posts are provided, respectively.

13. A waveguide type polarizer according to claim 10, characterized in that:

for the first and second rectangular branching waveguides, first and second rectangular waveguide steps are provided, respectively.