Waveguide coaxial conversion device and transmission/reception integrated splitter

Patent metadata

Field	Value
Publication number	US-9831539-B2
Application number	US-201415027498-A
Country	US
Kind code	B2
Filing date	Oct 3, 2014
Priority date	Oct 7, 2013
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

A coaxial waveguide conversion device according to the present invention includes a first member; a second member provided so as to be opposed to the first member; and a conductor plate provided so as to be sandwiched between the first member and the second member. A waveguide is formed in the first member and the second member to a depth that penetrates the first member and does not penetrate the second member. The conductor plate includes an opening having a shape corresponding to a shape of an aperture plane of the waveguide; a conductor surface portion provided around the opening; an antenna portion; a waveguide short-circuit portion connecting the antenna portion with the conductor surface portion; a coaxial wiring portion provided at one end of the antenna portion; and a coaxial line short-circuit portion connecting another end of the antenna portion with the conductor surface portion.

First claim

The invention claimed is:

1. A waveguide coaxial conversion device comprising:
a first member;
a second member provided so as to be opposed to the first member; and
a conductor plate provided so as to be sandwiched between the first member and the second member, wherein
the conductor plate includes:
an opening having a shape corresponding to a shape of a groove of a waveguide on a surface of the first member that is opposed to the conductor plate;
a conductor surface portion provided around the opening;
an antenna portion formed so as to cross the opening;
a waveguide short-circuit portion that is perpendicular to the antenna portion and connects the antenna portion with the conductor surface portion;
a coaxial wiring portion provided at one end of the antenna portion; and
a coaxial line short-circuit portion configured to connect another end of the antenna portion of the conductor plate with the conductor surface portion, and

the first member and the second member each include a groove in which the waveguide is formed, and grooves formed at positions respectively corresponding to the coaxial wiring portion and the coaxial line short-circuit portion.

2. The waveguide coaxial conversion device according to claim 1 , wherein
a length of the waveguide short-circuit portion is determined by a passband of a signal to be transmitted, and
a length of the coaxial line short-circuit portion is determined by a stopband of a signal to be transmitted.

3. The waveguide coaxial conversion device according to claim 1 , wherein passband matching of signals to be transmitted is adjusted according to a distance between a center position of the antenna portion and a center position of the waveguide short-circuit portion, a width of the antenna portion, and a width of the waveguide short-circuit portion.

4. A transmission/reception integrated splitter, comprising:
the waveguide coaxial conversion device according to claim 1 ; and
a coaxial circulator configured to transmit a signal received from a first path to a coaxial wiring portion of the waveguide coaxial conversion device, and outputs, to a second path, the signal transmitted from the coaxial wiring portion of the waveguide coaxial conversion device.

5. The transmission/reception integrated splitter according to claim 4 , further comprising:
a first waveguide coaxial converter connected to a first-path-side port of the coaxial circulator;
a first filter portion connected between the first waveguide coaxial converter and an input port;
a second waveguide coaxial converter connected to a second-path-side port of the coaxial circulator; and
a second filter portion connected between the second waveguide coaxial converter and an output port.

6. The transmission/reception integrated splitter according to claim 4 , further comprising a third filter portion provided between the waveguide coaxial conversion device and the coaxial circulator.

7. A waveguide coaxial conversion device comprising:
a first member connected with an external waveguide;
a second member provided so as to be opposed to the first member; and
a conductor plate provided so as to be sandwiched between the first member and the second member,
wherein the conductor plate includes:
an opening having a shape corresponding to an aperture plane of the waveguide;
an antenna portion formed so as to cross the opening;
a coaxial short-circuit portion configured to connect one end of the antenna portion to a conductor portion of the conductor plate;
a coaxial wiring portion provided at another end of the antenna portion; and
a waveguide short-circuit portion configured to connect a node between one end and another end of the antenna portion to the conductor portion of the conductor plate.

Assignees

• Nec Corp

Inventors

• Shiroyama Norihisa
• Sasaki Kiyotake
• Ueda Sumio
• Miyamoto Takahiro

Classifications

• H01P5/103

  Hollow-waveguide/coaxial-line transitions · CPC title

• H01P1/383 Primary

  Junction circulators, e.g. Y-circulators · CPC title

• H01P5/08

  for linking dissimilar lines or devices (H01P1/16, H01P5/04 take precedence; linking lines of the same kind but with different dimensions H01P5/02) · CPC title

• H01P5/107 Primary

  Hollow-waveguide/strip-line transitions · CPC title

• H01P1/20

  Frequency-selective devices, e.g. filters · CPC title