Microwave switch with grooves for isolation of the passages

• US 6,218,912 B1
• Filed: 04/14/1999
• Issued: 04/17/2001
• Est. Priority Date: 05/16/1998
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Mayer, Bernd
• Primary Examiner(s): Bettendorf, Justin P.
• Application Number:
  US09/291,384
• Time in Patent Office: 734 Days
• Field of Search: 333/105, 333/106, 333/108, 333/259
• US Class Current: 333/106
• CPC Class Codes: H01P 1/122 Waveguide switches

Abstract

The microwave switch includes a housing (1) and a rotor (2) having a rotor axis (A). The rotor (2) includes respective plate-shaped parts (10,20) having corresponding ring-shaped outer surfaces (OS, OS′) and walls (15 to 18) extending between the plate-shaped parts. The rotor (2) is provided with through-going passages (7,8,9) extending transversely to the rotor axis (A) between the plate-shaped parts (10,20) and the walls (15 to 18). Grooves (6) for improving isolation of the passages (7,8,9) are provided only in the ring-shaped outer surfaces (OS, OS′) and extend longitudinally substantially parallel to the rotor axis (A). The grooves (6) open into the passages and the passages are bounded by the plate-shaped parts (10,20) in both directions of the rotor axis.

Claims

1. A microwave switch comprising a housing (1) and a rotor (2) having a rotor axis (A), wherein said rotor comprises respective plate-shaped parts (10,20) having corresponding ring-shaped outer surfaces (OS,OS′

) and walls (15,16,17,18) extending between said plate-shaped parts (10,20), said rotor (2) being provided with through-going passages (7,8,9) extending transversely to said rotor axis (A) between said plate-shaped parts (10,20) and said walls (15,16,17,18), said plate-shaped parts (10,20) being provided with a plurality of grooves (6) in said ring-shaped outer surfaces (OS,OS′

) in order to improve isolation of said passages (7,8,9), said grooves extending in a longitudinal direction thereof so as to be substantially parallel to said rotor axis (A) and opening into said passages, said passages (7,8,9) being bounded by said plate-shaped parts (10,20) in both directions of said rotor axis (A).

2. The microwave switch as defined in claim 1, wherein said grooves (6) are arranged in said plate-shaped parts (10,20) circumferentially spaced between respective opposing pairs (15,16;

16,17;

17,18) of said walls bounding said passages.

3. The microwave switch as defined in claim 1, wherein two of said grooves are located in one of said ring-shaped outer surfaces circumferentially spaced from each other and from opposing ones of said walls bounding one of said passages.

4. The microwave switch as defined in claim 1, wherein said passages include two flanking passages (8,9) of an R switch and a central passage (7) located between said two flanking passages.

5. The microwave switch as defined in claim 1, wherein at least one of said passages is an R switch outer passage.

6. The microwave switch as defined in claim 1, wherein said walls have outer surfaces and none of said grooves (6) are provided in said outer surfaces of said walls.