Waveguide device module and microwave module

Patent metadata

Field	Value
Publication number	US-2019288366-A1
Application number	US-201916430893-A
Country	US
Kind code	A1
Filing date	Jun 4, 2019
Priority date	Dec 6, 2016
Publication date	Sep 19, 2019
Grant date	—

Abstract

A waveguide device module includes a waveguide created between an electrically conductive member and a waveguide member. The waveguide member includes a stem and branches extending from an end of the stem, including a first branch and a second branch. A first/second conductor line is connected to a first/second position on the first/second branch. The waveguide includes a first/second waveguide from the end of the stem to the first/second position. The first and second waveguides are formed so that, when the first and second conductor lines are respectively connected to two terminals of a microwave IC and first and second electromagnetic waves of a same frequency and mutually opposite phases propagate respectively through the first and second waveguides, a difference between a phase variation of the first electromagnetic wave and a phase variation of the second electromagnetic wave is within ±90 degrees of an odd multiple of 180 degrees.

First claim

What is claimed is:

1 . A waveguide device module comprising:
an electrically conductive member having an electrically conductive surface; a waveguide member opposing the electrically conductive surface and extending alongside the electrically conductive surface, the waveguide member having an electrically-conductive waveguide face and including a stem and a plurality of branches that extend from an end of the stem, the plurality of branches including a first branch and a second branch; an artificial magnetic conductor extending on both sides of the waveguide member; and a plurality of conductor lines, including a first conductor line connected to a first position on the first branch and a second conductor line connected to a second position on the second branch, wherein, the electrically conductive member and the waveguide member constitute a waveguide, the waveguide including a first waveguide from the end of the stem to the first position and a second waveguide from the end of the stem to the second position; and when the first conductor line and the second conductor line are respectively connected to first and second antenna I/O terminals of a microwave integrated circuit element and a first electromagnetic wave and a second electromagnetic wave of a same frequency and mutually opposite phases propagate respectively through the first waveguide and the second waveguide, the first waveguide and the second waveguide are of such a relationship that a difference between a variation in phase of the first electromagnetic wave while propagating through the first waveguide and a variation in phase of the second electromagnetic wave while propagating through the second waveguide is within ±90 degrees of an odd multiple of 180 degrees.

2 . The waveguide device module of claim 1 , wherein,
the first electromagnetic wave and the second electromagnetic wave each have a wavelength of λg, a difference in length between the first waveguide and the second waveguide is within ±(λg/4) of an odd multiple of (λg/2).

3 . The waveguide device module of claim 1 , wherein at least one of the following is locally varied:
a spacing between the electrically conductive member and the waveguide member, and a width of the waveguide face of the waveguide member, of the first waveguide; and a spacing between the electrically conductive member and the waveguide member, and a width of the waveguide face of the waveguide member, of the second waveguide.

4 . The waveguide device module of claim 2 , wherein the first waveguide differs in length from the second waveguide.

5 . The waveguide device module of claim 1 , wherein,
the first waveguide differs in length from the second waveguide; one of the first waveguide and the second waveguide includes a bend; and the other of the first waveguide and the second waveguide is linear-shaped.

6 . The waveguide device module of claim 1 , wherein the first branch and the second branch each have an opposite end from the stem, the end constituting a portion of a choke structure.

7 . The waveguide device module of claim 1 , wherein,
the first waveguide differs in length from the second waveguide; one of the first waveguide and the second waveguide includes a bend; the other of the first waveguide and the second waveguide is linear-shaped; and the first branch and the second branch each have an opposite end from the stem, the end constituting a portion of a choke structure.

8 . The waveguide device module of claim 1 , wherein,
the first antenna I/O terminal of the microwave integrated circuit element is a signal terminal to which an active signal is applied, and the second antenna I/O terminal is a ground terminal; the first conductor line is connected to the first antenna I/O terminal; and the second conductor line is connected to the second antenna I/O terminal.

9 . The waveguide device module of claim 1 , wherein,
the first waveguide differs in length from the second waveguide; one of the first waveguide and the second waveguide includes a bend; the other of the first waveguide and the second waveguide is linear-shaped; the first branch and the second branch each have an opposite end from the stem, the end constituting a portion of a choke structure; the first antenna I/O terminal of the microwave integrated circuit element is a signal terminal to which an active signal is applied, and the second antenna I/O terminal is a ground terminal; the first conductor line is connected to the first antenna I/O terminal; and the second conductor line is connected to the second antenna I/O terminal.

10 . The waveguide device module of claim 7 , wherein,
the first antenna I/O terminal of the microwave integrated circuit element is a signal terminal to which an active first signal is applied, and the second antenna I/O terminal is a signal terminal to which an active second signal is applied, the active second signal having a same amplitude as and an inverted polarity from the active first signal applied to the first antenna I/O terminal; the first conductor line is connected to the first antenna I/O terminal to transmit the first signal; and the second conductor line is connected to the second antenna I/O terminal to transmit the second signal.

11 . The waveguide device module of claim 1 , wherein,
the plurality of branches of the waveguide member include a third branch extending from the end of the stem; the plurality of conductor lines include a third conductor line connected to a third position on the third branch, the third conductor line being connected to a third antenna I/O terminal of the microwave integrated circuit element; the waveguide constituted by the electrically conductive member and the waveguide member further includes a third waveguide from the end of the stem to the third position; and, when the third conductor line is connected to the third antenna I/O terminal of the microwave integrated circuit element, and a third electromagnetic wave of a same frequency as that of the first electromagnetic wave and the second electromagnetic wave propagate through the third waveguide, the first waveguide and the third waveguide are of such a relationship that a difference between a variation in phase of the first electromagnetic wave while propagating through the first waveguide and a variation in phase of the third electromagnetic wave while propagating through the third waveguide is within ±90 degrees of an odd multiple of 180 degrees, and the second waveguide and the third waveguide are of such a relationship that a difference between a variation in phase of the second electromagnetic wave while propagating through the second waveguide and a variation in phase of the third electromagnetic wave while propagating through the third waveguide is within ±90 degrees of an even multiple of 180 degrees.

12 . The waveguide device module of claim 1 , wherein,
the first waveguide differs in length from the second waveguide; one of the first waveguide and the second waveguide includes a bend; the other of the first waveguide and the second waveguide is linear-shaped; the first branch and the second branch each have an opposite end from the stem, the end constituting a portion of a choke structure; the first antenna I/O terminal of the microwave integrated circuit element is a signal terminal to which an active signal is applied, and the second antenna I/O terminal is a ground terminal; the first conductor line is connected to the first antenna I/O terminal; the second conductor line is connected to the second antenna I/O terminal; the plurality of branches of the waveguide member include a third b

Assignees

• Nidec Corp
• Wgr Co Ltd

Inventors

• Kirino Hideki
• Kamo Hiroyuki

Classifications

• G01S2013/93185

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• G01S7/032

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