Combination antenna

• US 6,031,496 A
• Filed: 08/06/1997
• Issued: 02/29/2000
• Est. Priority Date: 08/06/1996
• Status: Expired due to Fees

• Current Assignee: Filtronic LK Oy
• Original Assignee: IK Products Incorporated
• Inventors: Kuittinen, Tero, Annamaa, Petteri
• Primary Examiner(s): Le, Hoanganh
• Application Number:
  US08/907,297
• Time in Patent Office: 937 Days
• Field of Search: 343/702, 343/906, 343/895, 343/725, 343/729, 343/726, 343/730, 343/727
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/24 with receiving set
• CPC Class Codes: H01Q 1/244 extendable from a housing along a given path
• CPC Class Codes: H01Q 21/29 Combinations of different interacting antenna units for giving a desired directional characteristic H01Q25/00 takes precedence

Abstract

A combination antenna has two antenna parts (8; 9, 9a, 17) and a connector part (10) to connect them to a radio apparatus. The first antenna part is a whip antenna and the second antenna part comprises a planar surface and a conductive pattern (16) formed on it to transmit and receive radio-frequency radiation. When the antenna parts are mechanically coupled to the connector part the plane surface, which includes a radiating conductive pattern, is separated from said first antenna part. In addition, the second antenna part or another part of the construction may include a plane surface with a plating on it, which in the normal operating position protects the user'"'"'s head from radiation.

Claims

1. A combination antenna for radio frequency transmitting and receiving comprising:

a first antenna part (8) and a second antenna part (9, 9a,

     17), said first antenna part being a straight conductor constituting a whip antenna, and;

a connector part (10) for connecting said first and second antenna parts to radio apparatus, characterized in that

said second antenna part (9, 9a,

     17) comprises a first plane surface which further comprises a conductive pattern (16) for transmitting an)d receiving radio-frequency radiation, a second plane surface which comprises an electrically conductive area (21), which is essentially as wide as said conductive pattern, for attenuating in a certain direction radio-frequency radiation emitted by said conductive pattern (16),

while said first and second antenna mechanically contacted to said connector part, said first plane surface is separated from said first antenna part and

said first antenna part is moveable with respect to said connector part and said second antenna part.

2. The combination antenna of claim 1, characterized in that said second plane surface is physically included in a different part (9b) than said first plane surface.

3. The combination antenna of claim 1, characterized in that said second plane surface is included in the second antenna part (9, 17).

4. The combination antenna of claim 3, characterized in that while said first (8) and second (9) antenna parts are mechanically coupled to said connector part, said second plane surface is between said first plane surface and said first antenna part.

5. The combination antenna of claim 3, characterized in that while said first (8) and second (17) antenna parts are mechanically contacted to said connector part, said first antenna part is between said first and second plane surfaces and extends through said second antenna part.

6. The combination antenna of claim 1, characterized in that said second antenna part comprises at least two plane surfaces and said conductive pattern is divided (16a, 16b) onto at least two plane surfaces.

7. The combination antenna of claim 1, characterized in that said second antenna part is made of a material which is one of the following:

printed circuit board, lowloss substrate used as a substrate for microstrip couplings.

8. The combination antenna of claim 7, characterized in that said connector part is substantially cylindrically symmetric and while said first and second antenna parts are mechanically coupled to said connector part, the longitudinal axis of said first antenna part coincides with the longitudinal axis of said connector part and said second antenna part is located off the longitudinal axis of said connector part.

9. The combination antenna of claim 1, characterized in that said second antenna part is made of a dielectric ceramic material.

10. The combination antenna of claim 9, characterized in that said connector part is substantially cylindrically symmetric and while said first and second antenna parts are mechanically coupled to said connector part, their longitudinal axes coincide with the longitudinal axis of said connector part.

12. The combination antenna of claim 7, characterized in that said conductive pattern comprises a first end and a second end and said electrical conductor connects said coupling area to a location which is between said first and second ends.

11. A combination antenna for radio transmission and reception comprising:

a first antenna part (8) and a second antenna part (9, 9a,

     17), said first antenna part being a straight conductor comprising a whip antenna,

a connector part (10) for connecting said first and second antenna parts to a radio apparatus, and

a second plane surface which further comprises an electrically conductive area for attenuating in a certain direction radio-frequency radiation emitted by a conductive pattern, characterized in that

said second antenna part (9, 9a,

     17) comprises a first plane surface which further comprises said conductive pattern (17) for transmitting and receiving radio-frequency radiation,

while said first and second antenna parts are mechanically coupled to said connector part, said first plane surface is separated from said first antenna part and said first antenna part is between said first and second plane surfaces and extends through said second antenna part, and

said second plane surface is included in the second antenna part (9,

     17),

said second antenna part further comprises;

a cylindrical hole (18) for allowing said first antenna part to pass through it,

an electrically conductive coupling area on the inner surface of said hole, and

an electrical conductor (19) between said coupling area and the conductive pattern (16, 16a, 16b) on the first plane surface of said second antenna part.