Small antenna

• US 6,693,604 B2
• Filed: 10/12/2001
• Issued: 02/17/2004
• Est. Priority Date: 10/12/2000
• Status: Expired due to Fees

• Current Assignee: Furukawa Electric Company Limited, Sony Corporation (Sony Group Corp.)
• Original Assignee: Furukawa Electric Company Limited, Sony Corporation (Sony Group Corp.)
• Inventors: Imagawa, Toshiyuki, Oozeki, Minoru, Washiro, Takanori, Iso, Yoichi
• Primary Examiner(s): Wimer, Michael C.
• Application Number:
  US09/976,754
• Publication Number:
  US 20020063658A1
• Time in Patent Office: 858 Days
• Field of Search: 343/895, 343/700.MS, 343/702, 343/806
• US Class Current: 343/895
• CPC Class Codes: H01Q 1/36 Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewithH01Q1/08, H01Q1/14 take precedence
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• 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 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

A small antenna comprises a first meander part formed in such a manner that a meander conductor travels to a first direction and having a first end and a second end, and a second meander part formed in such a manner that a meander conductor travels to a second direction different from the first direction and having a first end connected with the second end of the first meander part and a second end.

Claims

1. A small antenna comprising:

a first meander part formed in such a manner that a meander conductor travels to a first direction and having a first end and a second end; and

a second meander part formed in such a manner that a meander conductor travels to a second direction different from the first direction and having a first end connected with said second end of said first meander part and a second end;

wherein

a meander width of said second meander part is smaller than a meander width of said first meander part,

a pitch of said second meander part is smaller than a meander width of said first meander part, and

a plurality of pitches of said second meander part are formed in the meander width of said first meander part.

2. The small antenna according to claim 1, further comprising a feeder terminal part with which said first end of said first meander part is connected.

3. The small antenna according to claim 1, further comprising:

a ground terminal part with which said first end of said first meander part is connected; and

a feeder terminal part with which an intermediate part in said first meander part is connected.

4. The small antenna according to claim 1, further comprising a capacity addition part whose conductor width is wider than that of said meander conductor, provided to a second end of the said second meander part with which said first meander part is not connected.

5. A small antenna comprising:

a first meander part formed in such a manner that a meander conductor travels to a first direction and having a first end and a second end; and

a second meander part formed in such a manner that a meander conductor travels to a second direction different from the first direction and having a first end connected with said second end of said first meander part and a second end;

an

a feeder terminal part, said feeder terminal part being connected with said first end of said first meander part, which is not connected with said second meander part.

6. The small antenna according to claim 5, further comprising:

a ground terminal part with which said first end of said first meander part is connected; and

a feeder terminal part with which an intermediate part in said first meander part is connected.

7. The small antenna according to claim 5, further comprising

a capacity addition part whose conductor width is wider than that of said meander conductor, provided to a second end of the said second meander part with which said first meander part is not connected.

8. A small antenna comprising:

a first helical part formed in such a manner that a helical conductor travels to a first direction and having a first end and a second end; and

a second helical part connected with the second end of said first helical part, formed in such a manner that a helical conductor travels to a direction different from the first direction, and having a first end connected with said second end of said first part and a second end;

wherein

a helical width of said second helical part is smaller than helical width of said first helical part,

a helical pitch of said second helical part is smaller than the helical width of said first helical part, and

a plurality of pitches of said second helical part are formed in the helical width of said first helical part.

9. The small antenna according to claim 8, further comprising a feeder terminal part with which said first end of said first helical part is connected.

10. The small antenna according to claim 8, further comprising:

a ground terminal part with which said first end of said first helical part is connected; and

a feeder terminal part with which an intermediate part in said first helical part is connected.

11. The small antenna according to claim 8, further comprising a capacity addition part whose conductor width is wider than that of said helical conductor, provided to a second end of the said second helical part with which said first helical part is not connected.

12. A small antenna comprising:

a first helical part formed in such a manner that a helical conductor travels to a first direction and having a first end and a second end; and

a second helical part connected with the second end of said first helical part, formed in such a manner that a helical conductor travels to a direction different from the first direction, and having a first end connected with said second end of said first part and a second end; and

a feeder terminal part, said feeder terminal part being connected with said first end of said first helical part, which is not connected with said second helical part.

13. The small antenna according to claim 12, further comprising:

a ground terminal part with which said first end of said first helical part is connected; and

a feeder terminal part with which an intermediate part in said first helical part is connected.

14. The small antenna according to claim 12, further comprising

a capacity addition part whose conductor width is wider than that of said helical conductor, provided to a second end of the said second helical part with which said first helical part is not connected.