MOBILE RADIO APPARATUS

• US 20110260933A1
• Filed: 06/23/2009
• Published: 10/27/2011
• Est. Priority Date: 12/25/2008
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Kakitsu, Haruhiko, Takahashi, Tsukasa
• Application Number:
  US13/142,208
• Publication Number:
  US 20110260933A1
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/521 reducing the coupling between adjacent antennas
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00

Abstract

A mobile radio apparatus that can prevent degradation of the antenna characteristic if three or more antenna elements are included is provided.

A mobile radio apparatus includes a housing; a circuit board 20 provided in the housing; and a first antenna 11, a second antenna 12, and a third antenna 13 placed in one end in the housing and operating in different operation frequency bands. The first antenna 11 operates in a first operation frequency band, the second antenna 12 operates in a second frequency band close to the first operation frequency band, and the third antenna 13 operates in a third operation frequency band not close to the first operation frequency band or the second operation frequency band and is placed between the first antenna 11 and the second antenna 12 in the one end in the housing.

Claims

1. A mobile radio apparatus comprising:

a housing;

a circuit board provided in the housing; and

a first antenna element, a second antenna element, and a third antenna element that are placed in one end in the housing and operating in different operation frequency bands;

wherein the first antenna element operates in a first operation frequency band, wherein the second antenna element operates in a second frequency band that is close to the first operation frequency band, wherein the third antenna element operates in a third operation frequency band that is not close to the first operation frequency band or the second operation frequency band and is placed between the first antenna element and the second antenna element in the one end in the housing, and

wherein the distance between the end part and a third feeding section for feeding power to the third antenna element is longer than the distance between the one end and a first feeding section for feeding power to the first antenna element and is longer than the distance between the one end and a second feeding section for feeding power to the second antenna element.

2. The mobile radio apparatus as claimed in claim 1, wherein when two operation frequency bands are close to each other, the ratio of the difference between the lowest frequency in the higher band of the two operation frequency bands and the highest frequency in the lower band of the two operation frequency bands to the lowest frequency in the higher band of the two operation frequency bands is equal to or less than 0.2.

4. The mobile radio apparatus as claimed in claim 1, further comprising;

a fourth antenna element that is placed in the one end in the housing and operating in a different operation frequency band from those of the first antenna element, the second antenna element, and the third antenna element₄

wherein the fourth antenna element operates in a fourth operation frequency band close to the third operation frequency band and not close to the first operation frequency band or the second operation frequency band and is placed on the opposite side to the third antenna element relative to the second antenna element or on the opposite side to the third antenna element relative to the first antenna element in the one end in the housing.

3. (canceled)