High-frequency module

Patent metadata

Field	Value
Publication number	US-11749873-B2
Application number	US-201917312046-A
Country	US
Kind code	B2
Filing date	Nov 27, 2019
Priority date	Dec 11, 2018
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

A plurality of waveguide structures are loaded on a top surface opposed to a bottom surface of a metal case, on which a high-frequency circuit is mounted, a height, a width, and a length of each of the plurality of waveguide structures have dimensions corresponding to a quarter-wave of a cutoff frequency indicating a frequency band of a target electromagnetic wave to be blocked, and a width and a length of each of the plurality of waveguide structures have dimensions that allow only a high-frequency wave of a mode to propagate in the frequency band.

First claim

The invention claimed is:

1. A high-frequency module comprising:
a metal case including a hollow rectangular box, the metal case being configured to house a high-frequency circuit in an interior space of the hollow rectangular box; and
a plurality of waveguide structures on a top surface of the metal case, the top surface of the metal case being opposed to the interior space and disposed over a bottom surface of the metal case, the bottom surface of the metal case being configured to attach the high-frequency circuit, wherein a height of each of the plurality of waveguide structures has a dimension corresponding to a quarter-wave of a cutoff frequency indicating a frequency band of a target electromagnetic wave to be blocked, and wherein a width and a length of each of the plurality of waveguide structures have dimensions that allow only a high-frequency wave of a TE 10 mode to propagate in the frequency band.

2. The high-frequency module according to claim 1 , wherein
the plurality of waveguide structures are on the top surface in a row at a smaller interval than the quarter-wave along a second direction orthogonal to a first direction in which the target electromagnetic wave propagates.

3. The high-frequency module according to claim 1 , wherein the plurality of waveguide structures are on the top surface in an array at a smaller interval than the quarter-wave along a first direction in which the target electromagnetic wave propagates and a second direction orthogonal to the first direction.

4. The high-frequency module according to claim 3 , wherein the plurality of waveguide structures arranged in one or more rows of the array along the second direction have a height corresponding to a quarter-wave of an individual cutoff frequency.

5. A high-frequency module comprising:
a metal case including a hollow rectangular box;
a high-frequency circuit housed in an interior of the hollow rectangular box, wherein the high-frequency circuit is mounted to a first surface of the metal case; and
a plurality of waveguide structures on a second surface of the metal case opposite the interior of the hollow rectangular box and disposed above the first surface of the metal case, wherein a height of each of the plurality of waveguide structures has a dimension corresponding to a quarter-wave of a cutoff frequency indicating a frequency band of a target electromagnetic wave to be blocked.

6. The high-frequency module of claim 5 , wherein a width and a length of each of the plurality of waveguide structures have dimensions that allow only a high-frequency wave of a TE 10 mode to propagate in the frequency band.

7. The high-frequency module of claim 5 , wherein the plurality of waveguide structures are disposed in a row at a smaller interval than the quarter-wave along a second direction orthogonal to a first direction in which the target electromagnetic wave propagates.

8. The high-frequency module of claim 5 , wherein the plurality of waveguide structures are disposed in an array at a smaller interval than the quarter-wave along a first direction in which the target electromagnetic wave propagates and a second direction orthogonal to the first direction.

9. The high-frequency module of claim 8 , wherein the plurality of waveguide structures arranged in one or more rows of the array along the second direction have a height corresponding to a quarter-wave of an individual cutoff frequency.

Assignees

• Nippon Telegraph & Telephone

Inventors

• Hamada Hiroshi
• Nosaka Hideyuki

Classifications

• H01P1/207 Primary

  Hollow waveguide filters (H01P1/212, H01P1/213, H01P1/215, H01P1/219 take precedence) · CPC title

• H01P1/211

  Waffle-iron filters; Corrugated structures · CPC title

• H01P3/123

  with a complex or stepped cross-section, e.g. ridged or grooved waveguides (H01P3/14 takes precedence) · CPC title

• H01P7/06

  Cavity resonators · CPC title

• H05K9/00

  Screening of apparatus or components against electric or magnetic fields (devices for absorbing radiation from an antenna H01Q17/00) · CPC title