Stationary mobile radio antenna

• US 20050264463A1
• Filed: 08/19/2004
• Published: 12/01/2005
• Est. Priority Date: 05/27/2004
• Status: Active Grant

• Current Assignee: Kathrein-Werke KG. (Kathrein SE)
• Original Assignee: Kathrein-Werke KG. (Kathrein SE)
• Inventors: Gottl, Maximilian, Kinker, Robert
• Granted Patent: US 7,075,498 B2
• Time in Patent Office: Days
• US Class Current: 343/797
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 5/42 using two or more imbricated arrays H01Q5/49 takes precedence

Abstract

An improved antenna arrangement is distinguished by the following features:

• • the passive and electrically conductive element comprises a beamforming element (25),
  • the at least one beamforming element (25) that is provided is subdivided into at least two sections, specifically a mounting section (25a) and an operating section (25b), which is connected to the area of the mounting section (25a) located further away from the reflector (1).

Claims

1. A stationary mobile radio antenna comprising:

a reflector,

at least one antenna element for operation in at least one polarization plane (PE),

at least one passive, electrically conductive element, which is at least indirectly electrically conductively connected or electrically capacitively coupled to the reflector, the passive, electrically conductive element comprising a beamforming element,

the at least one beamforming element being subdivided into at least two sections, including a mounting section and an operating section, which is connected to the area of the mounting section located further away from the reflector,

the operating section being disposed on an operating plane (WE),

the operating plane (WE) running parallel to, or differs from being parallel to it by less than ±

20°

, at least in that section of the reflector in the area of the beamforming element and/or of the antenna element to be influenced thereby,

the length of the operating section being between 0.2 λ and

1.0 λ

, where lambda is a wavelength in the frequency band to be transmitted,

the operating section or the operating plane (WE) being at a distance from the reflector in the area of the operating section, which distance is greater than or equal to 0.2 λ and

is less than or equal to 1.5 λ

, where lambda λ

is the wavelength of the frequency band to be transmitted,

the length of the mounting section being shorter than a maximum of twice the wavelength 2 λ

of the frequency band to be transmitted,

the operating section being aligned parallel to, or differing by less than ±

20°

from being parallel to, the associated polarization plane (PE) of the antenna elements to be influenced thereby, and

the alignment or the at least essential alignment of the operating section running parallel to the associated polarization of the antenna element to be influenced thereby, or differing from being parallel to it by less than 20°

.

2. The antenna as claimed in claim 1, wherein the material thickness or the cross-sectional size of the mounting section and/or of the operating section is less than 0.1 λ

, where lambda is the wavelength of the frequency band to be transmitted.

3. The antenna as claimed in claim 1, wherein the mounting section lies at least essentially on the polarization plane (PE) of the antenna element arrangement.

4. The antenna as claimed in claim 1, wherein the operating section runs parallel to the dipole to be influenced via it, or at an angle of less than 20°

to it.

5. The antenna as claimed in claim 1, wherein the length of the mounting section is greater than the distance between the operating section and the reflector.

6. The antenna as claimed in claim 1, wherein the foot point of the mounting section as well as its transition area or transition point which is located at a distance from the reflector and at which the operating section starts, is located at least approximately on the same polarization plane (PE) as the antenna element.

7. The antenna as claimed in claim 1, wherein, in the case of a linear-polarized antenna element, the mounting section and the operating section of the beamforming element lie substantially on the polarization plane (PE) of the linear-polarized antenna element.

8. The antenna as claimed in claim 1, wherein at least two beamforming elements are provided for each polarization.

9. The antenna as claimed in claim 8, wherein the at least two beamforming elements which are provided at least for each polarization are arranged symmetrically with respect to a plane of symmetry which runs at right angles to the polarization plane (PE) and at right angles to the reflector through the center on the associated antenna element.

10. The antenna as claimed in claim 1, wherein a dual-polarized antenna element arrangement has as least two, and preferably at least four, beamforming elements.

11. The antenna as claimed in claim 10, wherein the operating section runs parallel to one of the two mutually perpendicular polarization planes.

12. The antenna as claimed in claim 10, wherein the mounting section runs on a polarization plane W (PE).

13. The antenna as claimed in claim 10, wherein the operating section is aligned at least approximately at right angles, to the mounting section on which it is mounted.

14. The antenna as claimed in claim 1, wherein, in a plan view of a dual-band or multiband antenna, at least parts of the operating sections are arranged such that they are located at least approximately at the same lateral distance from the side boundary of the reflector as the associated parallel dipole halves of adjacent antenna elements for transmission in a lower frequency band.

15. The antenna as claimed in claim 1, wherein the operating sections are arranged parallel to the dipole halves of adjacent antenna elements which are provided for transmission in a lower frequency band.

16. The antenna as claimed in claim 14, wherein the operating sections lie on an operating plane (WE) which corresponds to the antenna element plane of the antenna elements which emit in a higher frequency band.

17. The antenna as claimed in claim 1, wherein, in a plan view of the antenna arrangement, the operating section lies on an extension of the associated mounting section.

18. The antenna as claimed in claim 1, wherein the alignment of the operating section is aligned to be copolar with the respective active element, in particular in the form of an antenna element, to be influenced by this, on the polarization plane (PE) of an antenna element.