Directional coupler, high frequency circuit module and wireless communication system

• US 20030027539A1
• Filed: 10/01/2002
• Published: 02/06/2003
• Est. Priority Date: 05/19/2000
• Status: Active Grant

• Current Assignee: Renesas Electronics Corporation
• Original Assignee: Hitachi, Ltd.
• Inventors: Arai, Satoshi, Akamine, Hitoshi, Imai, Shun, Nunogawa, Yasuhiro, Nagamori, Hiroyuki
• Granted Patent: US 6,972,640 B2
• Time in Patent Office: Days
• US Class Current: 455/234.1
• CPC Class Codes: H01L 2224/32225 the item being non-metallic, e.g. insulating substrate with or without metallisation
• CPC Class Codes: H01L 2224/48227 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• CPC Class Codes: H01L 2924/13091 Metal-Oxide-Semiconductor Field-Effect Transistor [MOSFET]
• CPC Class Codes: H01L 2924/15153 the die mounting substrate comprising a recess for hosting the device
• CPC Class Codes: H01L 2924/15313 being a land array, e.g. LGA
• CPC Class Codes: H01L 2924/19105 in a side-by-side arrangement on a common die mounting substrate
• CPC Class Codes: H01P 5/185 Edge coupled lines
• CPC Class Codes: H01P 5/187 Broadside coupled lines

Abstract

A directional coupler for detecting an output of a high frequency circuit module includes a main line and a sub-line overlapped with the main line with a dielectric material. The sub-line is set, in width, narrower than the main line and both side edges of the sub-line are allocated at the internal side of both side edges of the main line. Accordingly, the sub-line is surely provided opposed to the main line in the total width area and a signal current flowing into the main line can be detected in higher accuracy. Therefore, a wireless communication system for controlling an output of the high frequency circuit module by including such directional coupler assures stable communication.

Claims

1. A high frequency circuit module, comprising:

an input terminal;

an output terminal;

a control terminal for receiving a power control signal;

an amplifying system including a plurality of amplifying stages connected between said input terminal and said output terminal;

a directional coupler for detecting an output of said amplifying system wherein

said amplifying system is controlled in its power with a power control signal supplied to said control terminal,

said directional coupler includes a first line connected to said output terminal and a second line that outputs a signal to form the power control signal to be supplied to said control terminal, and

a width of the first line is different from a width of the second line.