Flexible waveguide tube having a dielectric body thereon

• US 5,528,208 A
• Filed: 05/10/1994
• Issued: 06/18/1996
• Est. Priority Date: 05/12/1993
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Kobayashi, Hideki
• Primary Examiner(s): Lee, Benny T.
• Application Number:
  US08/241,134
• Time in Patent Office: 770 Days
• Field of Search: 333/241, 333/239, 333/248
• US Class Current: 333/241
• CPC Class Codes: H01P 3/14 flexible

Abstract

A flexible waveguide tube is applicable for a desired millimeter wave band with maintaining sufficient strength for satellite application. The flexible waveguide tube includes a bellows portion and flexing at the bellows portion. The flexible waveguide tube further comprises a dielectric body disposed within the waveguide tube, the dielectric body being placed in spaced apart relationship with at least one inner peripheral surface of the bellows portion.

Claims

1. A flexible waveguide tube comprising:

a flexible bellows portion having inner peripheral surfaces;

at least one dielectric body disposed within the waveguide tube, said dielectric body being placed in spaced apart relationship with at least one of said inner peripheral surfaces of said bellows portion;

wherein said waveguide tube has a rectangular cross section, said bellows portion having two oppositely disposed ends, respective rectangular tube portions are provided at both ends of said bellows portion, each said rectangular tube portion having a plurality of inner peripheral surfaces, and said dielectric body being in contact with two of said inner peripheral surfaces of said rectangular tube portion, said two inner peripheral surfaces in contact with said dielectric body being opposite each other.

2. A flexible waveguide tube as set forth in claim 1, wherein said dielectric body has a specific dielectric constant greater than or equal to 2.

3. A flexible waveguide tube as set forth in claim 1, wherein said dielectric body is poly tetra fluoro ethylene.

4. A flexible waveguide tube as set forth in claim 1, wherein said dielectric body being in polygonal cross section.

5. A flexible waveguide tube as set forth in claim 1, wherein said dielectric body is positioned in contact with said two inner peripheral surfaces of said rectangular tube portions along longitudinal axes of said two inner peripheral surfaces, said longitudinal axes extending in a direction of a wave propagating past said two inner peripheral surfaces.

6. A flexible waveguide tube comprising:

a flexible bellows portion having inner peripheral surfaces;

at least one dielectric body disposed within the waveguide tube, said dielectric body being placed in spaced apart relationship with at least one of said inner peripheral surfaces of said bellows portion;

wherein said waveguide tube has a rectangular cross section, said bellows portion having two oppositely disposed ends, respective rectangular tube portions are provided at both ends of said bellows portion, each said rectangular tube portion having a plurality of inner peripheral surfaces, and said dielectric body being in contact with three of said inner peripheral surfaces of each said rectangular tube portion.

7. A flexible waveguide tube as set forth in claim 6, wherein two of said three inner peripheral surfaces of each said rectangular tube portion in contact with said dielectric body being opposite to each other, said dielectric body is positioned to contact said two inner peripheral surfaces along longitudinal axes of said two inner peripheral surfaces, said longitudinal axes extending in a direction of a wave propagating past said two inner peripheral surfaces.

8. A flexible waveguide tube comprising:

a flexible bellows portion having inner peripheral surfaces;

at least one dielectric body disposed within the waveguide tube, said dielectric body being placed in spaced apart relationship with at least one of said inner peripheral surfaces of said bellows portion;

wherein said waveguide tube has a rectangular cross section, said bellows portion having two oppositely disposed ends, respective rectangular tube portions are provided at both ends of said bellows portion, each said rectangular tube portion having a plurality of inner peripheral surfaces, and said dielectric body includes a first dielectric body being in contact with two of said inner peripheral surfaces of each said rectangular tube portion, and a second dielectric body being in contact with three of said inner peripheral surfaces of each said rectangular tube portion.

9. A flexible waveguide tube comprising:

a flexible bellows portion having inner peripheral surfaces;

at least one dielectric body disposed within the waveguide tube, said dielectric body being placed in spaced apart relationship with at least one of said inner peripheral surfaces of said bellows portion;

wherein said waveguide tube has a rectangular cross section, said bellows portion having two oppositely disposed ends, respective rectangular tube portions are provided at both ends of said bellows portion, each said rectangular tube portion having a plurality of inner peripheral surfaces, and said dielectric body includes first and second dielectric bodies being in contact with two of said inner peripheral surfaces of said rectangular tube portions, said two contacted inner peripheral surfaces being opposite to each other.

10. A flexible waveguide tube comprising:

a flexible bellows portion having inner peripheral surfaces;

at least one dielectric body disposed within the waveguide tube, said dielectric body being placed in spaced apart relationship with at least one of said inner peripheral surfaces of said bellows portion;

wherein said dielectric body is in a rectangular configuration.

11. A flexible waveguide tube comprising:

a flexible bellows portion having inner peripheral surfaces;

at least one dielectric body disposed within the waveguide tube, said dielectric body being placed in spaced apart relationship with at least one of said inner peripheral surfaces of said bellows portion;

wherein said dielectric body is in a cylindrical configuration.

12. A flexible waveguide tube comprising:

a flexible bellows portion having inner peripheral surfaces;

.

at least one dielectric body disposed within the waveguide tube, said dielectric body being placed in spaced apart relationship with at least one of said inner peripheral surfaces of said bellows portion;

wherein said dielectric body is maintained in spaced apart relationship with all of said inner peripheral surfaces by dielectric body supports.

13. A flexible waveguide tube as set forth in claim 12, wherein said bellows portion has two oppositely disposed ends, with respective rectangular tube portions provided at both ends of said bellows portion, and said dielectric body supports being disposed in said rectangular tube portions.

14. A flexible waveguide tube comprising:

a flexible bellows portion having inner peripheral surfaces;

at least one dielectric body disposed within the waveguide tube, said dielectric body being placed in spaced apart relationship with at least one of said inner peripheral surfaces of said bellows portion;

wherein said dielectric body is in spaced apart relationship with all of said inner peripheral surfaces of said bellows portion.