Waveguide switch

Patent metadata

Field	Value
Publication number	US-9793588-B2
Application number	US-201514965491-A
Country	US
Kind code	B2
Filing date	Dec 10, 2015
Priority date	Dec 12, 2014
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

A movable waveguide block 50 having transmission lines 51 and 52 slides in a non-contact manner between a first end surface 30 b of a first fixing waveguide block 30 having transmission lines 31 and 32 and a second end surface 40 a of a second fixing waveguide block 40 having a transmission line 41 , and switching of propagation paths is performed. Grooves 35 A, 35 B, 36 A, 36 B, 45 A, 45 B, 55 A, 55 B, 56 A, 56 B, 57 A, 57 B, 58 A, and 58 B having depths equivalent to ¼ of a guide wavelength of an electromagnetic wave of a leakage prevention object are provided in pairs around openings of the transmission lines 31, 32, 41, 51 , and 52 facing each other across a gap between blocks. Accordingly, unintended leakage of electromagnetic waves to the transmission lines via the gap between the blocks is prevented, and isolation increases.

First claim

What is claimed is:

1. A waveguide switch, comprising:
a base portion;
a first fixing waveguide block which is fixed to the base portion and in which a plurality of transmission lines surrounded by metal walls is formed to penetrate to a first end surface;
a second fixing waveguide block which is fixed to the base portion and has a second end surface parallel to the first end surface of the first fixing waveguide block, and in which a transmission line surrounded by metal walls is formed to penetrate from the second end surface; and
a movable waveguide block which includes a third end surface which is parallel to and faces the first end surface of the first fixing waveguide block at a predetermined interval from the first end surface, a fourth end surface which is parallel to and faces the second end surface of the second fixing waveguide block at a predetermined interval from the second end surface, and a plurality of transmission lines surrounded by metal walls which are formed to penetrate from the third end surface to the fourth end surface, and which is supported by the base portion in a state where the movable waveguide block can slide in parallel to the first end surface of the first fixing waveguide block and the second end surface of the second fixing waveguide block due to a drive device,
wherein grooves having a depth equivalent to ¼ of a guide wavelength of a leakage prevention object frequency are provided to prevent leakage of electromagnetic waves from a gap between the blocks at a position of a portion which surrounds each of openings of the plurality of transmission lines of the first fixing waveguide block on the first end surface side of the first fixing waveguide block, a position of a portion which surrounds an opening of the waveguide of the second fixing waveguide block on the second end surface side of the second fixing waveguide block, and a position of a portion which surrounds each of openings of the plurality of waveguides of the movable waveguide block on the third end surface side and the fourth end surface side of the movable waveguide block.

2. The waveguide switch according to claim 1 ,
wherein the plurality of transmission lines of the first fixing waveguide block are formed to penetrate from a fifth end surface facing the first end surface toward the first end surface,
wherein the transmission line of the second fixing waveguide block is formed to penetrate from the second end surface toward a sixth end surface facing the second end surface,
wherein the drive device is provided in the base portion, and
wherein the movable waveguide block is formed such that some of the plurality of transmission lines of the movable waveguide block connect some of the plurality of transmission lines of the first fixing waveguide block and the transmission line of the second fixing waveguide block when the movable waveguide block is positioned at a first position, and some other portions of the transmission lines of the movable waveguide block connect some other portions of the plurality of transmission lines of the first fixing waveguide block and the transmission line of the second fixing waveguide block when the movable waveguide block is positioned at a second position.

3. The waveguide switch according to claim 1 ,
wherein the plurality of grooves are concentrically provided at predetermined intervals.

4. The waveguide switch according to claim 2 ,
wherein the plurality of grooves are concentrically provided at predetermined intervals.

5. The waveguide switch according to claim 3 ,
wherein a distance between the openings of the transmission lines of each of the first end surface side of the first fixing waveguide block, the second end surface side of the second fixing waveguide block, and the third end surface side and the fourth end surface side of the movable waveguide block and an inner groove is ¼ of a guide wavelength of a frequency in a region sufficiently lower than a lower limit of a transmission frequency region of the transmission line.

6. The waveguide switch according to claim 4 ,
wherein a distance between the openings of the transmission lines of each of the first end surface side of the first fixing waveguide block, the second end surface side of the second fixing waveguide block, and the third end surface side and the fourth end surface side of the movable waveguide block and an inner groove is ¼ of a guide wavelength of a frequency in a region sufficiently lower than a lower limit of a transmission frequency region of the transmission line.

7. The waveguide switch according to claim 3 ,
wherein a distance between an inner groove and an outer groove of each of the first end surface side of the first fixing waveguide block, the second end surface side of the second fixing waveguide block, and the third end surface side and the fourth end surface side of the movable waveguide block is ¼ of a guide wavelength of an odd number multiple of a transmission center frequency of the transmission line.

8. The waveguide switch according to claim 4 ,
wherein a distance between an inner groove and an outer groove of each of the first end surface side of the first fixing waveguide block, the second end surface side of the second fixing waveguide block, and the third end surface side and the fourth end surface side of the movable waveguide block is ¼ of a guide wavelength of an odd number multiple of a transmission center frequency of the transmission line.

9. The waveguide switch according to claim 5 ,
wherein a distance between an inner groove and an outer groove of each of the first end surface side of the first fixing waveguide block, the second end surface side of the second fixing waveguide block, and the third end surface side and the fourth end surface side of the movable waveguide block is ¼ of a guide wavelength of an odd number multiple of a transmission center frequency of the transmission line.

10. The waveguide switch according to claim 6 ,
wherein a distance between an inner groove and an outer groove of each of the first end surface side of the first fixing waveguide block, the second end surface side of the second fixing waveguide block, and the third end surface side and the fourth end surface side of the movable waveguide block is ¼ of a guide wavelength of an odd number multiple of a transmission center frequency of the transmission line.

11. The waveguide switch according to claim 1 ,
wherein an upper surface, a side surface, and a lower surface of the waveguide switch are covered with a metal case, and an upper surface and a side surface of the movable waveguide block are not in contact with an inner wall of the metal case.

12. The waveguide switch according to claim 2 ,
wherein an upper surface, a side surface, and a lower surface of the waveguide switch are covered with a metal case, and an upper surface and a side surface of the movable waveguide block are not in contact with an inner wall of the metal case.

13. The waveguide switch according to claim 3 ,
wherein an upper surface, a side surface, and a lower surface of the waveguide switch are covered with a metal case, and an upper surface and a side surface of the movable waveguide block are not in contact with an inner wall of the metal case.

14. The waveguide switch according to claim 4 ,
wherein an upper surface, a side surface, and a lower surface of the waveguide switch are covered with a metal case, and an upper surface and a side surface of the movable waveguide block are not in contact with an inner wall of the metal case.

15. The waveguide switch according to claim 5 ,
wherein an uppe

Assignees

• Anritsu Corp

Inventors

• Kawamura Takashi
• Otani Akihito

Classifications

• H01P1/10 Primary

  for switching or interrupting {(in systems using reflection or reradiation of radio, acoustic or other waves G01S7/034)} · CPC title

• H01P1/122 Primary

  Waveguide switches · CPC title