TRANSMISSION LINE CONVERTER

• US 20100176894A1
• Filed: 07/05/2007
• Published: 07/15/2010
• Est. Priority Date: 07/05/2007
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Ohba, Tetsuya, Yamaguchi, Satoshi, Tahara, Yukihiro, Oh-Hashi, Hideyuki
• Granted Patent: US 8,169,274 B2
• Time in Patent Office: Days
• US Class Current: 333/26
• CPC Class Codes: H01P 5/107 Hollow-waveguide/strip-line transitions

Abstract

A transmission line converter in which a rectangular waveguide provided under a transmission line may be reduced in size. The transmission line converter includes: a rectangular waveguide; a slot provided in a wall surface of the rectangular waveguide; and a transmission line which extends in a direction of a tube axis of the rectangular waveguide and includes signal conductors and a ground conductor, the slot is provided in a narrower wall surface of the rectangular waveguide and has a shape in which a central portion of the slot includes an oblique portion to the tube axis of the rectangular waveguide and at least one of both end portions of the oblique portion includes a portion parallel to the tube axis of the rectangular waveguide, and the wall surface of the rectangular waveguide in which the slot is provided is a part of the ground conductor.

Claims

1. A transmission line converter, comprising:

a rectangular waveguide;

a slot provided in a wall surface of the rectangular waveguide; and

a transmission line which extends in a direction of a tube axis of the rectangular waveguide and includes a signal conductor and a ground conductor,

wherein the slot is provided in the wall surface with a narrower width, of the rectangular waveguide and has a shape in which a central portion of the slot includes an oblique portion to the tube axis of the rectangular waveguide and at least one of both end portions of the oblique portion includes a portion parallel to the tube axis of the rectangular waveguide, and

wherein the wall surface of the rectangular waveguide in which the slot is provided is a part of the ground conductor.

2. The transmission line converter according to claim 1, wherein the transmission line includes one end opened at a position which is separated approximately ¼

times a propagation wavelength in the transmission line from the slot.

3. The transmission line converter according to claim 1, wherein the transmission line includes one end short-circuited at a position which is separated approximately ½

times a propagation wavelength in the transmission line from the slot.

4. The transmission line converter according to claim 1, wherein the rectangular waveguide includes one end short-circuited at a position which is separated approximately ¼

times a guide wavelength in the rectangular waveguide from the slot.

5. The transmission line converter according to claim 1, wherein the transmission line comprises a microstrip line.

6. The transmission line converter according to claim 1, wherein the transmission line comprises a coaxial line.

7. The transmission line converter according to claim 1, wherein the transmission line comprises a strip line.