Mobile terminal to prevent degradation of antenna characteristics

• US 9,954,270 B2
• Filed: 06/12/2014
• Issued: 04/24/2018
• Est. Priority Date: 09/03/2013
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Nakayama, Takashi
• Primary Examiner(s): Levi, Dameon E
• Assistant Examiner(s): ISLAM, HASAN Z
• Application Number:
  US14/903,328
• Publication Number:
  US 20160380334A1
• Time in Patent Office: 1,412 Days
• CPC Class Codes: G06F 1/1626 with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
• CPC Class Codes: G06F 1/1698 the I/O peripheral being a sending/receiving arrangement to establish a cordless communication link, e.g. radio or infrared link, integrated cellular phone details of antennas disposed inside a computer H01Q1/2266
• CPC Class Codes: H01P 5/10 for coupling balanced lines or devices with unbalanced lines or devices
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/50 Structural association of antennas with earthing switches, lead-in devices or lightning protectors
• CPC Class Codes: H01Q 9/0407 Substantially flat resonant element parallel to ground plane, e.g. patch antenna dipole H01Q9/285; monopole H01Q9/40
• CPC Class Codes: H01Q 9/0421 with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence
• CPC Class Codes: H04M 1/026 Details of the structure or mounting of specific components
• CPC Class Codes: H04M 1/0266 for a display module assembly

Abstract

A mobile terminal includes: a plurality of antenna inputs; a selecting unit configured to select one of the plurality of antenna inputs; a metal chassis used for holding a panel for display and maintaining mechanical strength of the panel; and a PIFA type antenna having a resonance pattern and a coaxial cable in which a coating removed portion is provided in a part in a manner that an external conductor is exposed, the PIFA type antenna being configured to fix the coating removed portion in a vicinity of an upper end of the metal chassis.

Claims

1. A mobile terminal, comprising:

a panel configured to display a menu;

a metal chassis configured to hold the panel; and

a planar inverted F antenna (PIFA) antenna, comprising;

a resonance pattern that extends away from a face of the panel; and

a coaxial cable comprising an external conductor, wherein coating of a portion of the external conductor is removed such that a coating removed portion of the external conductor is exposed,

wherein the PIFA antenna is configured to fix the resonance pattern in a vicinity of an upper end of the metal chassis, and

wherein an input impedance of the PIFA antenna is adjusted based on a length of the coating removed portion and a change in a first distance between an end terminal of the resonance pattern and a start position of the coating removed portion.

2. The mobile terminal according to claim 1, wherein the upper end of the metal chassis is separated from the resonance pattern by a second distance.

3. The mobile terminal according to claim 1, wherein the panel comprises an optical touch panel, and the PIFA antenna is present outside the optical touch panel.

4. The mobile terminal according to claim 1, wherein the resonance pattern is on a flexible substrate or on a wiring substrate.

5. The mobile terminal according to claim 1, wherein the resonance pattern comprises a metal.