Antenna for radio-operated communication terminal equipment

• US 6,483,462 B2
• Filed: 01/26/2000
• Issued: 11/19/2002
• Est. Priority Date: 01/26/1999
• Status: Expired due to Term

• Current Assignee: Gigaset Communications GmbH (Gigaset AG)
• Original Assignee: Siemens AG
• Inventors: Weinberger, Martin
• Primary Examiner(s): LE, HOANGANH T
• Application Number:
  US09/491,368
• Publication Number:
  US 20010050635A1
• Time in Patent Office: 1,028 Days
• Field of Search: H01/Q.138, H01/Q.124, 343/700.MS, 343/702, 343/846, 343/848
• US Class Current: 343/700.0MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• 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 5/357 using a single feed point
• CPC Class Codes: H01Q 5/364 Creating multiple current paths
• CPC Class Codes: H01Q 5/371 Branching current paths
• 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: H01Q 9/0471 Non-planar, stepped or wedge-shaped patch

Abstract

The present invention is directed to an antenna for radio-operated communication terminal devices. For effecting a multi-band antenna, a planar inverted-F antenna is provided that is designed in size for a predetermined, lower emission frequency and that includes one or more notchings or graduations in longitudinal direction with which one or more geometrical paths derive over whose course emittable waves form with a higher frequency than the predetermined, lower frequency.

Claims

1. An antenna for radio-operated communication terminal device, comprising:

a single antenna feed point;

at least one ground connection; and

a single inverted-F antenna designed for a predetermined, lower emission frequency and connected to both the antenna feed point and the at least one ground connection, wherein a size of the inverted-F antenna determines an overall dimension of the antenna, the inverted-F antenna having a non-planar cross-sectional shape and including at least one notching in longitudinal direction with which at least one geometrical path derives which proceeds from a comer point created by the notchings to a further point selected from the group consisting of the feed point, a further corner point and an end point of the inverted-F antenna, wherein over a course of the at least one geometrical path emittable waves form with a higher frequency than the predetermined, lower emission frequency.

2. An antenna for radio-operated communication terminal devices as claimed in claim 1, wherein a separate ground plate is allocated to the antenna having a variable size and shape.

3. An antenna for radio-operated communication terminal devices as claimed in claim 1, wherein individual parts of radiator elements of the antenna exhibit different heights and slopes.

4. An antenna for radio-operated communication terminal devices as claimed in claim 1, wherein the antenna is upset in at least one of its longitudinal direction and its transverse direction by suitable vertical structuring in a horizontal direction.

5. An antenna for radio-operated communication terminal devices as claimed in claim 1, wherein the antenna is integrated in a housing wall.

6. An antenna for radio-operated communication terminal devices as claimed in claim 1, wherein a position and a type of at least one ground connection between a radiator element and a ground surface of the antenna is adapted to desired antenna properties.

7. An antenna for radio-operated communication terminal devices as claimed in claim 1, wherein a position and a type of a feed connection to a radiator element of the antenna is adapted to desired antenna properties.

8. An antenna for radio-operated communication terminal devices as claimed in claim 1, wherein a position and a type of at least one ground connection between a defined, separate ground surface and a ground surface of the antenna are adapted to desired antenna properties.

9. An antenna for radio-operated communication terminal devices as claimed in claim 1, wherein positions of both a feed connection and the ground connections to an effective antenna ground are interchanged.

10. An antenna for radio-operated communication terminal devices as claimed in claim 1, wherein a feed connection and the ground connection contact a radiator element of the antenna at arbitrary positions.

11. An antenna for radio-operated communication terminal devices as claimed in claim 1, wherein a feed connection and the ground connections do not proceed on a straight line.

12. An antenna for radio-operated communication terminal devices as claimed in claim 1, wherein individual parts of a radiator element of the antenna are shaped such that they point in an arbitrary direction.

13. An antenna for radio-operated communication terminal devices as claimed in claim 1, wherein a radiator element structure of the antenna is divided into a plurality of sub-elements which meet a desired antenna function based on suitable coupling.

14. An antenna for radio-operated communication terminal devices as claimed in claim 1, wherein individual parts of radiator elements of the antenna are arbitrarily curved or folded in a horizontal plane.