Directional Coupler, antenna device, and transmitting-receiving device

• US 6,737,934 B2
• Filed: 07/24/2002
• Issued: 05/18/2004
• Est. Priority Date: 07/06/1998
• Status: Expired due to Fees

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Yamada, Hideaki, Tanizaki, Toru, Higashi, Kazutaka
• Primary Examiner(s): Pascal, Robert
• Assistant Examiner(s): Jones, Stephen E.
• Application Number:
  US10/202,219
• Publication Number:
  US 20020186095A1
• Time in Patent Office: 664 Days
• Field of Search: 333/111, 333/116, 333/109, 333/110, 333/113
• 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. 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.

2. 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.

3. 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.

4. 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.

5. An antenna device comprising a directional coupler including a first non-radiative dielectric transmission line and a second transmission line which are partially opposite to each other and extending substantially in a first linear direction, opposite portions of the first transmission line and the second transmission line being relatively shiftable in the first direction in parallel and operative to be shifted between an opposite state where electromagnetic coupling occurs and a non-opposite state where substantially no electromagnetic coupling occurs;

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. A transmitting-receiving device comprising an antenna device comprising a directional coupler including a first non-radiative dielectric transmission line and a second non-radiative dielectric transmission line which are partially opposite to each other and extending substantially in a first linear direction, opposite portions of the first transmission line and the second transmission line being relatively shiftable in the first direction in parallel and operative to be shifted between an opposite state where electromagnetic coupling occurs and a non-opposite state where substantially no electromagnetic coupling occurs;

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