PORTABLE TERMINAL

• US 20090224882A1
• Filed: 11/17/2005
• Published: 09/10/2009
• Est. Priority Date: 11/30/2004
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Sato, Hiroki
• Granted Patent: US 7,760,098 B2
• Time in Patent Office: Days
• US Class Current: 340/10.100
• CPC Class Codes: H01Q 1/2208 associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems methods or arrangements for sensing record carriers, e.g. for reading patterns G06K7/00; record carrier for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: H01Q 1/2216 used in interrogator/reader equipment
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Abstract

The portable terminal comprises: a lower case (2); an upper case (4); an electronic component mounting board (7) provided in the lower case (2) and having a first surface (5) and a second surface (6); an electronic component mounting board (14) provided in the upper case (4) and having a first surface (12) and a second surface (13), the first surface (12) being in opposition to the second surface (6) under the state the lower case (2) and the upper case (4) are in proximity to each other; a contactless communication antenna (8) provided in the lower case (2) oppositely to the first surface (5) of the electronic component mounting board (7) and performing the contactless communication with the reader/writer antenna; and a loop coil (15) provided in opposition to the second surface (13) of the electronic component mounting board (14).

Claims

1. A portable terminal capable of performing contactless communication with a reader/writer antenna, comprising:

a case;

an electronic component mounting board provided in said case and having first and second surfaces;

a contactless communication antenna provided in said case oppositely to said first surface of said electronic component mounting board and designed to perform said contactless communication with said reader/writer antenna; and

a loop coil provided in opposition to said second surface of said electronic component mounting board.

2. A portable terminal as set forth in claim 1, in which

said case has an inner surface, and

said loop coil is attached to said inner surface of said case.

3. A portable terminal as set forth in claim 1, in which

said case has an outer surface, and

said loop coil is attached to said outer surface of said case.

4. A portable terminal as set forth in claim 1, in which

said loop coil constitutes a resonant circuit.

5. A portable terminal as set forth in claim 4, further comprising a metal portion, in which

a resonance frequency of said loop coil is set based on a resonance frequency of said reader/writer antenna changed by a magnetic coupling between said reader/writer antenna and said metal portion.

6. A portable terminal as set forth in claim 5, in which

said resonance frequency of said loop coil is set within the range from 13.5 MHz to 16 MHz.

7. A portable terminal as set forth in claim 1, further comprising

a magnetic substance attached to said loop coil in opposition to said second surface of said electronic component mounting board.