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US 10,164,307 B2Granted
Waveguide bend formed in a metal block and coupled to a board unit to form a wireless device
AssigneeKabushiki Kaisha Toshiba
InventorsKoichiro Gomi, Tooru Kijima
Life of this patent
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Abstract
According to one embodiment, a waveguide bend includes a metal block. The metal block includes a first waveguide, a second waveguide and a third waveguide. The first waveguide, the second waveguide and the third waveguide are integrally formed. The second waveguide includes a bend at which a propagation direction of a radio wave is changed. An opening size of the second waveguide is smaller than an opening size of the first waveguide. The third waveguide is provided between the first waveguide and the second waveguide. An opening size of the third waveguide is smaller than the opening size of the first waveguide and is larger than the opening size of the second waveguide.
Claims13
A waveguide bend comprising:
- a metal block forming at least a part of a housing which accommodates a board unit, the board unit comprising a circuit configured to supply a radio wave to the waveguide bend, the metal block comprising a mounting surface, a first waveguide, a second waveguide, and a third waveguide, and the mounting surface, the first waveguide, the second waveguide, and the third waveguide being integrally formed,
- wherein:
- the mounting surface is configured to support the board unit that is mounted on the mounting surface,
- the second waveguide comprises a first straight portion, a second straight portion, and a bend, the second straight portion extends in a direction different from the first straight portion, the bend is provided between the first straight portion and the second straight portion and changes a propagation direction of the radio wave, and an opening size of the second waveguide is smaller than an opening size of the first waveguide,
- the third waveguide is provided between the first waveguide and the second straight portion of the second waveguide, and an opening size of the third waveguide is smaller than the opening size of the first waveguide and is larger than the opening size of the second waveguide,
- the first waveguide, the third waveguide, and the second straight portion of the second waveguide extend in a direction substantially perpendicular to the mounting surface and are arranged in a straight line in this order in the metal block,
- an internal space of the second waveguide has a substantially rectangular sectional shape in a cross section in a direction which is substantially perpendicular to the propagation direction of the radio wave, and
- in a case where:
- a frequency which is lower than a passband set to the waveguide bend is f;
- a width of the sectional shape of the internal space of the second waveguide in a longitudinal direction of the sectional shape is A;
- and light speed is c,
- the following relational expression is satisfied
- f<c/2A.
10 more elements
A wireless device comprising:
- a waveguide bend comprising a metal block, the metal block forming at least a part of a housing and comprising a mounting surface, a first waveguide, a second waveguide, and a third waveguide, and the mounting surface, the first waveguide, the second waveguide, and the third waveguide being integrally formed;
- and
- a board unit provided in the housing, the board unit being mounted on the mounting surface, and the board unit comprising a circuit configured to supply a radio wave to the waveguide bend,
- wherein:
- the second waveguide comprises a first straight portion, a second straight portion, and a bend, the second straight portion extends in a direction different from the first straight portion, the bend is provided between the first straight portion and the second straight portion and changes a propagation direction of the radio wave, and an opening size of the second waveguide is smaller than an opening size of the first waveguide,
- the third waveguide is provided between the first waveguide and the second straight portion of the second waveguide, and an opening size of the third waveguide is smaller than the opening size of the first waveguide and is larger than the opening size of the second waveguide,
- the first waveguide, the third waveguide, and the second straight portion of the second waveguide extend in a direction substantially perpendicular to the mounting surface and are arranged in a straight line in this order in the metal block,
- an internal space of the second waveguide has a substantially rectangular sectional shape in a cross section in a direction which is substantially perpendicular to the propagation direction of the radio wave, and
- in a case where:
- a frequency which is lower than a passband set to the waveguide bend is f;
- a width of the sectional shape of the internal space of the second waveguide in a longitudinal direction of the sectional shape is A;
- and light speed is c,
- the following relational expression is satisfied
- f<c/2A.
11 more elements
Dependencies are inferred from the claim text.