Portable wireless machine

• US 20050239519A1
• Filed: 06/26/2003
• Published: 10/27/2005
• Est. Priority Date: 06/26/2003
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Koshi, Masashi, Yamazaki, Yukari, Koyanagi, Yoshio, Saitou, Yutaka, Yamada, Kenichi
• Granted Patent: US 8,060,167 B2
• Time in Patent Office: Days
• US Class Current: 455/575.100
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 21/29 Combinations of different interacting antenna units for giving a desired directional characteristic H01Q25/00 takes precedence
• CPC Class Codes: H01Q 23/00 Antennas with active circuits or circuit elements integrated within them or attached to them
• CPC Class Codes: H01Q 3/24 varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
• CPC Class Codes: H01Q 3/247 by switching different parts of a primary active element
• CPC Class Codes: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence
• CPC Class Codes: H01Q 9/285 Planar dipole H01Q9/065 takes precedence; patch antenna H01Q9/0407
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
• CPC Class Codes: H04M 1/0214 Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position combined with translation movement H04M1/0235

Abstract

An upper case (1) is connected to a lower case (2) in a hinge portion (3) so as to freely rotate. A plate shaped conductor (4) and a plate shaped conductor (5) are disposed along the surface of the case in the upper case (1). A ground plate (6) is formed in a ground pattern of a circuit board disposed in the lower case (2). The plate shaped conductor (4) and the plate shaped conductor (5) are selected by a high frequency switch (14) and connected to one end of a feeding portion (15). The other end of the feeding portion (15) is connected to the ground plate (6) to form a dipole antenna.

Claims

1. A portable radio device comprising:

a first casing;

a second casing

a connection portion, connecting the first casing to the second casing so as to freely rotate;

a first antenna element, provided in the first casing;

a conductor element, provided in the second casing to form a dipole antenna together with the first antenna element; and

a feeding portion, having one end electrically connected to the first antenna element and the other end electrically connected to the conductor element.

2. The portable radio device as set forth in claim 1, wherein a plurality of first antenna elements are provided in the first casing;

and the portable radio device further comprising a switching portion which switches the plurality of first antenna elements so as to connect to the feeding portion.

3. The portable radio device as set forth in claim 2, wherein the switching portion switches whether the plurality of the first antenna elements are electrically connected to the feeding portion or the plurality of the first antenna elements are electrically connected to the conductor element, respectively.

4. The portable radio device as set forth in claim 2, further comprising a half-wavelength element being electrically connected between at least one of the plurality of th first antenna elements and the switching portion.

5. The portable radio device as set forth in claim 2, further comprising a plurality of half-wavelength elements being respectively electrically connected to the plurality of the first antenna elements.

wherein the switching portion selectively switches the plurality of the first antenna elements and the plurality of the helf-wavelength elements so as to connect to the feeding portion.

6. The portable radio device as set forth in claim 1, further comprising a plurality of impedance matching portions respectively corresponding to the plurality of the first antenna elements.

7. The portable radio device as set forth in claim 2, further comprising:

a casing opening and closing state detecting portion, detecting whether or not the first casing and the second casing are opened to each other; and

a control portion, controlling the switching portion in accordance with the detected result of the casing opening and closing state detecting portion.

8. The portable radio device as set forth in claim 2, further comprising a control portion, determining a receiving level of a radio circuit portion to control the switching portion so as to raise the receiving level.

9. The portable radio device as set forth in claim 1, wherein the antenna element and the conductor element are respectively formed in plate shapes along the surface of the first casing and the second casing.

10. The portable radio device as set forth in claim 9, further comprising:

a circuit board, provided in the second casing and having a radio circuit,

wherein the conductor element is formed in a ground pattern which is formed on the circuit board provided in the second casing;

wherein a ground of the radio circuit portion is electrically connected to the ground pattern; and

wherein the feeding portion is provided in the radio circuit portion.

11. A portable radio device as set forth in claim 1, further comprising:

a second antenna element, provided in the second casing near the connection portion;

an opening and closing state detecting portion, detecting the opening and closing states of the first casing and the second casing; and

a switching portion, selecting and switching any one of the first antenna element and the second antenna element to a connection to a signal processing portion for performing a signal process in accordance with the detected result of the casing opening and closing state detecting portion,

wherein when the first casing and the second casing are opened, the first antenna element and the conductor element form the dipole antenna; and

wherein when the first casing and the second casing are closed, the second antenna element and the conductor element form a mono-pole antenna.

12. The portable radio device as set forth in claim 11, wherein when the first casing and the second casing are opened, the switching portion selects the first antenna element;

and

wherein when the first casing and the second casing are closed, the switching portion selects the second antenna element.

13. The portable radio device as set forth in claim 1, further comprising:

a second antenna element provided in the second casing near the connection portion;

a receiving field intensity measuring portion, measuring the receiving field intensity of a signal received by the first antenna element or the second antenna element; and

a switching portion, selecting and switching the antenna element having a higher receiving field intensity to a connection to a signal processing portion for performing a signal process in accordance with the measured result of the receiving field intensity measuring portion,

wherein the first antenna element has a first feeding point for electrically connecting to the conductor element;

wherein the second antenna element has second feeding point for electrically connecting to the conductor element; and

wherein the first feeding point and the second feeding point are provided at the diagonal positions of opposed sides when the first casing and the second casing are opened.

14. The portable radio device as set forth in claim 11, further comprising:

a first matching portion, matching the impedance of the first antenna element to a prescribed value; and

a second matching portion, matching the impedance of the second antenna element to a prescribed value.

15. The portable radio device as set forth in claim 1, further comprising:

a circuit board, provided in the second casing;

a plurality of feeding portions, feeding electric current to the antenna element and being separated to each other;

a radio circuit, disposed in the circuit board; and

a switching portion, provided between the plurality of feeding portions and the radio circuit and selecting any one of the plurality of the feeding portions to connect the radio circuit.

16. The portable radio device as set forth in claim 1, further comprising:

a circuit board, provided in the second casing;

a radio circuit, disposed in the circuit board and electrically connected to the feeding portion;

a ground portion, spaced from the feeding portion and connecting the antenna element to the circuit board; and

a switching portion, switching whether the ground portion is connected to the circuit board or the ground portion and the circuit board are opened.

17. The portable radio device as set forth in claim 16, wherein a plurality of ground portions are provided;

and

wherein the ground portions are disposed so as to be spaced apart in the end part of the antenna element connected to the second casing.

18. The portable radio device as set forth in claim 17, wherein teh switching portion switches the ground portions respectively.

19. The portable radio device as set forth in claim 16, wherein the connection portion has an electric conductivity;

and

wherein the ground portion is electrically connected to the antenna element through the connection portion.

20. The portable radio device as set forth in claim 1, wherein the connection portion has an electric conductivity;

and

wherein the feeding portion is electrically connected to the antenna element through the connection portion.

21. The portable radio device as set forth in claim 15, further comprising:

a control circuit, controlling the switching portion in accordance with the level of a receiving signal received by the radio circuit.

22. The portable radio device as set forth in claim 1, wherein the first antenna element is an electric conductive frame forming a part of the first casing.