Branch tee dielectric waveguide line

• US 6,380,825 B1
• Filed: 02/03/2000
• Issued: 04/30/2002
• Est. Priority Date: 08/22/1997
• Status: Expired due to Term

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Uchimura, Hiroshi, Takenoshita, Takeshi
• Primary Examiner(s): Bettendorf, Justin P.
• Application Number:
  US09/497,792
• Time in Patent Office: 817 Days
• Field of Search: 333/125, 333/137, 333/238, 333/239
• US Class Current: 333/137
• CPC Class Codes: H01P 1/02 Bends; Corners; Twists
• CPC Class Codes: H01P 1/022 in waveguides of polygonal cross-section H01P1/065 takes precedence
• CPC Class Codes: H01P 3/121 integrated in a substrate
• CPC Class Codes: H01P 5/19 of the junction type

Abstract

A high-frequency dielectric waveguide line comprising a dielectric substrate with two conductor layers on its two surfaces, and a plurality of rows of through conductors in the substrate connecting the two conductor layers. The distances between the through conductors in each row are no more than half of the wavelength of the signal transmitted in the transmission direction of the waveguide. The waveguide line has a branching portion where a first waveguide line having a width d branches into second and third parallel waveguide lines both of width d. The portion of the waveguide at the branching point has a width of A, where 2d≦A≦3d. The first, second and third waveguide lines are connected without abrupt width enlargement. The branching waveguide line have small transmission losses for high-frequency signals.

Claims

1. A branch structure of a dielectric waveguide line comprising:

a pair of conductor layers between which a dielectric substrate is sandwiched; and

two rows of through conductor groups which are formed to electrically connect the conductor layers to each other at repetition intervals not more than one half of a signal wavelength of a high-frequency signal in a transmission direction of the high-frequency signal, and at a constant width d in a direction perpendicular to the transmission direction, first and second dielectric waveguide lines which transmit the high-frequency signal through a region surrounded by the conductor layers and the through conductor groups being disposed, a tip end of the first dielectric waveguide line being perpendicularly connected to an opening disposed in one side of the second dielectric waveguide line, wherein the through conductor groups in another side opposed to the opening of the second dielectric waveguide line are formed along two arcs which are respectively centered at through conductors at ends of the opening and which have a radius equal to the constant width d, to have a vertex at an intersection of the two arcs.

2. A branch structure of a dielectric waveguide line comprising:

a pair of conductor layers between which a dielectric substrate is sandwiched; and

two rows of through conductor groups which are formed to electrically connect the conductor layers to each other at repetition intervals not more than one half of a signal wavelength of a high-frequency signal in a transmission direction of the high-frequency signal, and at a constant width d in a direction perpendicular to the transmission direction, first and second dielectric waveguide lines which transmit the high-frequency signal through a region surrounded by the conductor layers and the through conductor groups being disposed, a tip end of the first dielectric waveguide line being perpendicularly connected to an opening disposed in one side of the second dielectric waveguide line, wherein the through conductor groups in another side opposed to the opening of the second dielectric waveguide line are formed along oblique sides of a triangle which has a base equal to the width of the opening, a vertex on a center line of the first dielectric waveguide line, and a height of d/2 or less.

3. A branch structure of a dielectric waveguide line comprising:

a pair of conductor layers between which a dielectric substrate is sandwiched; and

two rows of through conductor groups which are formed to electrically connect the conductor layers to each other at repetition intervals not more than one half of a signal wavelength of a high-frequency signal in a transmission direction of the high-frequency signal, and at a constant width d in a direction perpendicular to the transmission direction, first and second dielectric waveguide lines which transmit the high-frequency signal through a region surrounded by the conductor layers and the through conductor groups being disposed, a tip end of the first dielectric waveguide line being connected to an opening disposed in one side of the second dielectric waveguide line with setting transmission directions of the lines to be perpendicular to each other, wherein a width w of the opening satisfies relationships of d<

w≦

2d with respect to the constant width d, the tip end of the first dielectric waveguide line is connected to the opening by connection through conductor groups in which through conductors are arranged along arcs, and the through conductor groups in another side opposed to the opening of the second dielectric waveguide line is formed along two arcs which are respectively concentric with the arcs and which have a radius equal to a sum r+d of a radius r of the arcs and the constant width d, to have a vertex at an intersection of the two arcs.

4. A branch structure of a dielectric waveguide line comprising:

a pair of conductor layers between which a dielectric substrate is sandwiched; and

two rows of through conductor groups which are formed to electrically connect the conductor layers to each other at repetition intervals not more than one half of a signal wavelength of a high-frequency signal in a transmission direction of the high-frequency signal, and at a constant width d in a direction perpendicular to the transmission direction, first and second dielectric waveguide lines which transmit the high-frequency signal through a region surrounded by the conductor layers and the through conductor groups being disposed, a tip end of the first dielectric waveguide line being connected to an opening disposed in one side of the second dielectric waveguide line so that transmission directions of the lines are perpendicular to each other, wherein a width w of the opening satisfies relationships of d<

w≦

5d with respect to the constant width d, and the tip end of the first dielectric waveguide line is connected to the opening by connection through conductor groups linearly arranged.

7. The branch structure of a dielectric waveguide line of any one of claims 4 to 6, wherein the through conductor groups in another side opposed to the opening of the second dielectric waveguide line are formed along two arcs which are respectively centered at through conductors at ends of the opening and which have a radius equal to the constant width d, to have a vertex at an intersection of the two arcs.

8. The branch structure of a dielectric waveguide line of any one of claims 4 to 6, wherein the through conductor groups in another side opposed to the opening of the second dielectric waveguide line are formed along oblique sides of a triangle which has a base equal to the width of the opening, a vertex on a center line of the first dielectric waveguide line, and a height of d/2 or less.

5. A branch structure of a dielectric waveguide line comprising:

a pair of conductor layers between which a dielectric substrate is sandwiched; and

two rows of through conductor groups which are formed to electrically connect the conductor layers to each other at repetition intervals not more than one half of a signal wavelength of a high-frequency signal in a transmission direction of the high-frequency signal, and at a constant width d in a direction perpendicular to the transmission direction, first and second dielectric waveguide lines which transmit the high-frequency signal through a region surrounded by the conductor layers and the through conductor groups being disposed, a tip end of the first dielectric waveguide line being connected to an opening disposed in one side of the second dielectric waveguide line so that transmission directions of the lines are perpendicular to each other, wherein a width w of the opening satisfies relationships of d<

w≦

5d with respect to the constant width d, and the tip end of the first dielectric waveguide line is connected to the opening by connection through conductor groups arcuately arranged.

6. A branch structure of a dielectric waveguide line comprising:

a pair of conductor layers between which a dielectric substrate is sandwiched; and

two rows of through conductor groups which are formed to electrically connect the conductor layers to each other at repetition intervals not more than one half of a signal wavelength of a high-frequency signal in a transmission direction of the high-frequency signal, and at a constant width d in a direction perpendicular to the transmission direction, first and second dielectric waveguide lines which transmit the high-frequency signal through a region surrounded by the conductor layers and the through conductor groups being disposed, a tip end of the first dielectric waveguide line being connected to an opening disposed in one side of the second dielectric waveguide line so that transmission directions of the lines are perpendicular to each other, wherein a width w of the opening satisfies relationships of d<

w≦

5d with respect to the constant width d, and the tip end of the first dielectric waveguide line is connected to the opening by intermediate through conductor groups which have a width equal to the width of the opening and a length that is about one quarter of a guide wavelength of the high-frequency signal.