Directional coupler, antenna device, and transmitting-receiving device

• US 20020186095A1
• Filed: 07/24/2002
• Published: 12/12/2002
• Est. Priority Date: 07/06/1998
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Yamada, Hideaki, Tanizaki, Toru, Higashi, Kazutaka
• Granted Patent: US 6,737,934 B2
• Time in Patent Office: Days
• US Class Current: 333/111
• CPC Class Codes: H01P 5/18 consisting of two coupled guides, e.g. directional couplers
• CPC Class Codes: H01P 5/188 the guides being dielectric waveguides

Abstract

A first transmission line and a second transmission line are caused to be partially opposite to each other, and by use of the opposite portions of the first transmission line and the second transmission line, the first transmission line and the second transmission line are relatively shifted in parallel from their opposite state to their non-opposite state.

Claims

1. A directional coupler including a first transmission line and a second transmission line which are partially opposite to each other, opposite portions of the first transmission line and the second transmission line being relatively shiftable in parallel and operative to be shifted between an opposite state and a non-opposite state.

2. The directional coupler of claim 1, wherein either of the first transmission line and the second transmission line comprises plural transmission lines.

3. An antenna device comprising a directional coupler including a first transmission line and a second transmission line which are partially opposite to each other, opposite portions of the first transmission line and the second transmission line being relatively shiftable in parallel and operative to be shifted between an opposite state and a non-opposite state;

further comprising a primary radiator connected to the first transmission line and a terminal resistor connected to one end of the second transmission line.

6. The antenna device of claim 3, wherein the first transmission line comprises plural transmission lines, a primary radiator is connected to at least one of the plural first transmission lines, and one of the plural first transmission lines, not connected to the primary radiator, functions as a measurement terminal.

8. The antenna device of claim 3, wherein the terminal resistor is removable, and one end of the second transmission line having the terminal resistor connected thereto is used as a measurement terminal.

4. An antenna device comprising a directional coupler including a first transmission line and a second transmission line which are partially opposite to each other, opposite portions of the first transmission line and the second transmission line being relatively shiftable in parallel and operative to be shifted between an opposite state and a non-opposite state and wherein either of the first transmission line and the second transmission line comprises plural transmission lines further comprising a primary radiator connected to the first transmission line and a terminal resistor connected to one end of the second transmission line.

5. An antenna device comprising a directional coupler including a first transmission line and a second transmission line which are partially opposite to each other, opposite portions of the first transmission line and the second transmission line being relatively shiftable in parallel and operative to be shifted between an opposite state and a non-opposite state and wherein either of the first transmission line and the second transmission line comprises plural transmission lines, and further comprising plural primary radiators connected to the first transmission line, and a terminal resistor connected to one end of the second transmission line.

7. The antenna device of claim 5, wherein the first transmission line comprises plural transmission lines, a primary radiator is connected to at least one of the plural first transmission lines, and one of the plural first transmission lines, not connected to the primary radiator, functions as a measurement terminal.

9. The antenna device of claim 5, wherein the terminal resistor is removable, and one end of the second transmission line having the terminal resistor connected thereto is used as a measurement terminal.

10. A transmitting-receiving device comprising an antenna device comprising a directional coupler including a first transmission line and a second transmission line which are partially opposite to each other, opposite portions of the first transmission line and the second transmission line being relatively shiftable in parallel and operative to be shifted between an opposite state and a non-opposite state;

further comprising a primary radiator connected to the first transmission line and a terminal resistor connected to one end of the second transmission line.

13. The transmitting-receiving device of claim 10, wherein the first transmission line comprises plural transmission lines, a primary radiator is connected to at least one of the plural first transmission lines, and one of the plural first transmission lines, not connected to the primary radiator, functions as a measurement terminal.

15. The transmitting-receiving device of claim 10, wherein the terminal resistor is removable, and one end of the second transmission line having the terminal resistor connected thereto is used as a measurement terminal.

11. A transmitting-receiving device comprising an antenna device comprising a directional coupler including a first transmission line and a second transmission line which are partially opposite to each other, opposite portions of the first transmission line and the second transmission line being relatively shiftable in parallel and operative to be shifted between an opposite state and a non-opposite state and wherein either of the first transmission line and the second transmission line comprises plural transmission lines and further comprising a primary radiator connected to the first transmission line and a terminal resistor connected to one end of the second transmission line.

14. The transmitting-receiving device of claim 12, wherein the first transmission line comprises plural transmission lines, a primary radiator is connected to at least one of the plural first transmission lines, and one of the plural first transmission lines, not connected to the primary radiator, functions as a measurement terminal.

16. The transmitting-receiving device of claim 12, wherein the terminal resistor is removable, and one end of the second transmission line having the terminal resistor connected thereto is used as a measurement terminal.

12. A transmitting-receiving device comprising an antenna device comprising a directional coupler including a first transmission line and a second transmission line which are partially opposite to each other, opposite portions of the first transmission line and the second transmission line being relatively shiftable in parallel and operative to be shifted between an opposite state and a non-opposite state and wherein either of the first transmission line and the second transmission line comprises plural transmission lines, and further comprising plural primary radiators connected to the first transmission line, and a terminal resistor connected to one end of the second transmission line.