Title:
FOLDED WAVEGUIDE
Document Type and Number:
Japanese Patent JP3188174
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain stable performance with no adjustment, a simple configuration without any special precision of size and to reduce the cost by specifying the size of an open window at a folded part in a folded waveguide.
SOLUTION: The folded waveguide 20 is formed by folding a wide wall face of a square waveguide whose wide wall face width (lateral width) is (a) and whose narrow wall face width (height) is (b) at the angle of nearly 180°, and made up of a lower waveguide 21a, an upper waveguide 21b being in a laminated state and a folded part 22 to combine them. The size of an open window of the folded part 22 with respect to the waveguides 21a, 21b is selected to be a×h, and the value (h) is obtained by a relational equation h=(±/2)/(β1-β2), where β1 is a propagation constant of the square waveguide whose size is a×2b in the TE10 mode, β2 is a propagation constant of the square waveguide whose size is a×2b in the TE11 mode, 2b is selected to be a relation of 2b>λ0/2, and λ0 is a free space wavelength.
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Inventors:
Atsushi Minase
Tsutomu Yoneyama
Toshihiko Agatsuma
Tsutomu Yoneyama
Toshihiko Agatsuma
Application Number:
JP1020596A
Publication Date:
July 16, 2001
Filing Date:
January 24, 1996
Export Citation:
Assignee:
Hitachi Kokusai Electric Co., Ltd.
Tsutomu Yoneyama
Toshihiko Agatsuma
Tsutomu Yoneyama
Toshihiko Agatsuma
International Classes:
H01P1/02; H01L21/3065; H01Q13/02; H01Q13/06; H01Q13/08; H01Q13/16; H01Q13/20; H01Q21/06; (IPC1-7): H01P1/02; H01Q13/02; H01Q13/20; H01Q21/06
Domestic Patent References:
| JP8274501A | ||||
| JP495243A | ||||
| JP281155B1 | ||||
| JP5506759A |
Attorney, Agent or Firm:
Takehiko Suzue