High-frequency phase shifter unit having pivotable tapping element

• US 6,850,130 B1
• Filed: 07/27/2000
• Issued: 02/01/2005
• Est. Priority Date: 08/17/1999
• Status: Expired due to Term

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Kathrein-Werke KG. (Kathrein SE)
• Inventors: Markof, Mathias, Gabriel, Roland, Gottl, Maximilian
• Primary Examiner(s): LEE, BENNY T
• Application Number:
  US10/049,809
• Time in Patent Office: 1,650 Days
• Field of Search: 333/156, 333/161, 333/164, 333/139, 342/375, 342/372, 342/371
• US Class Current: 333/161
• CPC Class Codes: H01P 1/184 Strip line phase-shifters H01P1/181, H01P1/185, H01P1/19 take precedence
• CPC Class Codes: H01Q 19/108 Combination of a dipole with a plane reflecting surface H01Q19/106 takes precedence; strip line H01Q9/065
• CPC Class Codes: H01Q 21/08 the units being spaced along or adjacent to a rectilinear path waveguide fed H01Q21/0037
• CPC Class Codes: H01Q 3/32 by mechanical means

Abstract

An improved radio-frequency phase shift assembly includes at least one further stripline section arranged concentrically with respect to a first stripline section. Further connection lines are provided, via which an electrical connection is produced at least indirectly from the feed line to the respective tapping section associated with a stripline section. Two different pairs of antenna radiating elements can be driven with different phase angles (Φ) at mutually offset tapping points on the at least two stripline sections. The plurality of connection lines are mechanically connected to one another.

Claims

1. A radio-frequency phase shift assembly for coupling to a feed line, comprising:

at least first and second stripline sections which are arranged concentrically, said at least first and second stripline sections for coupling to at least two different pairs of antenna radiating elements driven with different phase angles (φ

) at mutually offset tapping points,

a tapping element pivotable about a pivoting axis, the tapping element having a first tapping section for said first stripline section and having a second tapping section for said second stripline section, said first and second tapping sections being respectively pivotable over the associated first and second stripline sections and being coupled thereto,

at least first and second connection lines, the tapping element being connected to said feed line such that the feed line is electrically connected via the first and second connection lines to the first and second tapping sections associated with said first and second stripline sections,

wherein the tapping element comprises a pointer element which rotates about the pivoting axis, and

wherein the second connection line is disposed with respect to the second stripline section by extending the first connection line which leads to the first tapping section.

2. The phase shift assembly as claimed in claim 1, wherein the at least first and second stripline sections have different impedance values.

3. The phase shift assembly as claimed in claim 1, wherein the first and second connection lines comprise transformers which share power in a predefined manner between the tapping sections of the at least first and second stripline sections.

4. The phase shift assembly as claimed in claim 1, wherein the tapping element comprises a radial point element originating from the pivoting axis.

5. The phase shift assembly as claimed in claim 1, wherein the at least first and second stripline sections comprise an innermost stripline section and an outermost stripline section, respectively, and wherein the share of the power fed in via the feed line decreases from the innermost stripline section to the outermost stripline section.

6. The phase shift assembly as claimed in claim 1, wherein the at least first and second stripline sections comprise an innermost stripline section and an outermost stripline section, the innermost and outermost stripline sections unequally sharing power fed in via the feed line.

7. The phase shift assembly as claimed in claim 1, wherein the at least first and second stripline sections, are fed with virtually the same power.

8. The phase shift assembly as claimed in claim 1, wherein at least one of the radius and diameter of the stripline sections increases by a constant factor.

9. The phase shift assembly as claimed in claim 1, wherein the phase shift assembly operates at a predetermined RF wavelength, and the distances between the stripline sections are 0.1 to 1.0 times the predetermined RF wavelength.

10. The phase shift assembly as claimed in claim 1, wherein the at least first and second tapping sections comprise capacitively coupled tapping sections each composed of flat strip conductors, and a dielectric disposed between said flat strip conductors.

11. The phase shift assembly as claimed in claim 1, further including a center tap electrically connected to the feed line, a capacitive coupling being provided between the center tap electrically connected to the feed line and a coupling section, said coupling section being electrically connected to the tapping element, said capacitive coupling comprising a dielectric provided between the at least first and second stripline sections.

12. The phase shift assembly as claimed in claim 1, further including a conductive, base plate antenna reflector, said at least first and second stripline sections and said tapping element being disposed on said reflector.

13. The phase shift assembly as claimed in claim 1, further including a metallic cover shielding said phase shift assembly.

14. The phase shift assembly as claimed in claim 1, further including a cover, and wherein the connection line and the at least first and second stripline sections, together with a cover defines a stripline.

15. The phase shift assembly as claimed in claim 1, wherein the at least first and second stripline sections each have a defined characteristic impedance.

16. The phase shift assembly as claimed in claim 1, further including a reflector, a dielectric, and a center tap for the tapping element that is separated from, and is held above, the reflector by a dielectric.

17. The phase shift assembly as claimed in claim 1, wherein the at least first and second stripline sections are curved.

19. The phase shift assembly as claimed in claim 1, wherein the center points of the at least first and second stripline sections lie on the pivoting axis of the tapping element.

20. The phase shift assembly as claimed in claim 1, wherein the center points of the at least first and second stripline sections and the center point of the pivoting axis are offset with respect to one another.

21. The phase shift assembly as claimed in claim 1, wherein the at least first and second stripline sections have different thicknesses.

25. The phase shift assembly of claim 1 wherein the stripline sections each have 50 ohms of impedance.

18. The phase shift assembly as claimed in 17, wherein the at least first and second stripline sections have center points, the at least first and second stripline sections are in the form of circle segments, said at least first and second stripline section center points being arranged such that they run in the form of circle segments around a common center point.

22. An RF phase shifter comprising:

plural arcuate stripline elements of different lengths; and

a pivotable radial tapping element capacitively coupled to tap each of said plural arcuate stripline elements simultaneously, said radial tapping element rotating about a pivoting axis, said radial tapping element dividing power unequally between said stripline elements in a predefined manner while simultaneously adjusting phase angle substantially equally in each of said plural arcuate stripline elements.

23. The phase shifter of claim 22 wherein the plural stripline elements each have first and second ends for connection to respective antenna radiating elements.

24. A radio-frequency phase shift assembly coupled to a feedline, comprising:

at least two stripline sections offset with respect to one another,

at least two different pairs of antenna radiating elements coupled to the at least two stripline sections and driven with different phase angles (Φ

) at mutually offset tapping points,

a tapping element pivotable about a pivoting axis,

the tapping element having a tapping section for each stripline section, the tapping sections being pivotable over the associated stripline section and being connected thereto,

the tapping element connected to the feed line such that the feed line is electrically connected via a number of connection lines to the tapping sections which are associated with respective stripline sections,

wherein

the stripline sections are disposed in straight lines parallel to one another,

the tapping element comprises a pointer element which rotates about the pivoting axis, and

the respective connection line is disposed with respect to a next, further outward stripline section by extending an inward connection line which leads to a respective further inward tapping section.