Dual-polarized radiating assembly
View Patent ↗An improved dual-polarized antenna arrangement has four antenna element devices each with a conductive structure between opposite antenna element ends. Those antenna element ends of two adjacent antenna element devices adjacent to one another are, in each case, isolated from one another for radio frequency purposes. Those antenna element ends of two adjacent antenna element devices located adjacent to one another in pairs form feed points, and the antenna element devices are fed at least approximately in phase and approximately symmetrically between the respective opposite feed points.
1. A dual-polarized antenna element arrangement having a reflector and further comprising:
at least four conductive antenna element devices arranged offset through at least approximately 90° with respect to one another, the at least four conductive antenna element devices being mounted with respect to the reflector;
the four antenna element devices each having opposite antenna ends and each having a conductive structure between their opposite antenna element ends, said antenna element ends of two adjacent antenna element devices which are disposed adjacent to one another being isolated from one another for radio frequency purposes, pairs of said antenna element ends disposed adjacent to one another forming feed points, the antenna element devices being fed between respective opposite feed points at least approximately in phase and approximately symmetrically.
2. A dual-polarized antenna element arrangement, as claimed in claim 1 wherein the antenna element arrangement operates in a radio frequency band, and wherein:
the antenna element device in plan view are located offset through approximately 90° in the circumferential direction with respect to one another and form gaps therebetween,
the gaps each have a feed point at a point located remotely from the reflector and isolated for radio frequency purposes,
the maximum distance, projected onto the reflector, between in each case two opposite antenna element devices being at least equal to ¼ of the wavelength of the operating frequency band, and
the antenna elements have feed points at which the antenna elements are fed at least approximately in phase with the feed points being formed by those adjacent antenna element ends which are adjacent to one another in pairs.
3. The dual-polarized antenna element arrangement as in claim 1 , further including an electrically conductive holder for each element and wherein the antenna element devices are each held and/or mounted by means of the electrically conductive holder with respect to the reflector, a gap, which runs from the reflector to the feed point being formed between the electrically conductive holder of one antenna element device and the holding device of an adjacent antenna element device.
4. The dual-polarized antenna element arrangement as in claim 3 , wherein the holder for the antenna element device is also formed from at least two rod devices, with the at least two rod devices originating from the respective antenna element end of the antenna element device, and leading to a point at a reflector-side end.
5. The dual-polarized antenna element arrangement as in claim 1 , wherein the gaps between two adjacent holding devices or rod devices have at least approximately the same width over the entire length thereof.
6. The dual-polarized antenna element arrangement as in claim 1 , wherein the element arrangement has an operating wavelength, and wherein the length of the gaps correspond to approximately ¼ of the operating wavelength.
7. The dual-polarized antenna element arrangement as in claim 1 , further including a holding device for each of the antenna element devices, gaps being formed between the holding devices, the gaps being short-circuited on the side thereof facing the reflector.
8. The dual-polarized antenna element arrangement as in claim 1 , wherein the length of the individual antenna element devices corresponds to approximately 0.2 times the wavelength to the wavelength itself at a mid-operating frequency of the dual-polarized antenna element arrangement.
9. The dual-polarized antenna element arrangement as in claim 1 , further including rod devices which originate from the opposite antenna element ends and a connecting element which is provided on the side facing the reflector, and wherein the antenna element devices and the rod devices which originate from the opposite antenna element ends, and the connecting element which is provided on the reflector side are in the form of a free surface.
10. The dual-polarized antenna element arrangement as in claim 9 , wherein the antenna element devices and the rod devices which originate from the opposite antenna element ends, and the connecting element which is provided on the side facing the reflector, or the boundary plane are designed to be conductive over the entire area thereof.
11. The dual-polarized antenna element arrangement as in claim 10 , wherein the antenna element device includes a supporting holding device as an element thereof, the supporting holding device defining a large number of apertures therethrough, in the form of a grid.
12. The dual-polarized antenna element arrangement as in claim 1 , further including a holding device in the form of rod devices designed to run in a straight line in a vertical sectional illustration, as an electrical element which is closed over at least part of the area thereof.
13. The dual-polarized antenna element arrangement as in claim 1 , further including a holding device in the form of rod devices designed to be kinked or curved, such that to change a direction profile, in a vertical sectional illustration as an electrical element which is closed over at least part of the area thereof.
14. The dual-polarized antenna element arrangement as in claim 13 , wherein the holding device has a section which is located closer to the reflector, said section being is aligned such that, in a vertical sectional illustration, it runs in an angle range from 20° to 70° diverging outward over the reflector.
15. The dual-polarized antenna element arrangement as in claim 13 , wherein at least one section of the holding device which is on the outside and is located further away from the reflector runs such that it is aligned at least approximately vertically with respect to the reflector.
16. The dual-polarized antenna element arrangement as in claim 1 , wherein the antenna element devices are designed to have an at least approximately square plan view.
17. The dual-polarized antenna element arrangement as in claim 1 , wherein the antenna element devices have an at least approximately convex overall plan view.
18. The dual-polarized antenna element arrangement as in claim 1 , wherein the antenna element devices have a concave-shaped plan view.
19. The dual-polarized antenna element arrangement as in claim 1 , further including attachments or lugs, which project outward in pairs opposite one another, formed on the antenna element devices.
20. The dual-polarized antenna element arrangement as in claim 19 , further including lengthening attachments formed on the attachments or lugs which project outward, pointing away from the reflector.
21. The dual-polarized antenna element arrangement as in claim 1 , wherein the antenna element arrangement has a cup-shaped structure.
22. The dual-polarized antenna element arrangement as in claim 1 , further including a further antenna element arrangement for operation in a further frequency band arranged in the interior of the antenna element arrangement in a plan view.
23. The dual-polarized antenna element arrangement as in claim 22 , wherein the further antenna element arrangement for operation in the further frequency band is in the form of a patch antenna element.
24. The dual-polarized antenna elements arrangement as in claim 22 , wherein the further antenna element arrangement for operation in the further frequency band is in the form of a cruciform dipole.
25. The dual-polarized antenna element arrangement as in claim 22 , wherein the further antenna element arrangement for operation in the further frequency band is in the form of a dipole square.
26. The dual-polarized antenna element arrangement as in claim 22 , wherein the further antenna element arrangement for operation in the further frequency band is in the form of a vector dipole.
27. The dual-polarized antenna element arrangement as in claim 1 , wherein two opposite feed points are connected together via a coaxial line of at least approximately the same length to form a central feed point, with the one set of opposite feed points connected together in pairs being used to feed one polarization, and the two further feed points which are connected together and are offset through 90° with respect to the first being used to feed the respective other polarization.
28. The dual-polarized antenna element arrangement as in claim 1 , wherein four antenna element devices are provided and, in a plan view, are arranged at least approximately symmetrically about a center point.
29. The dual-polarized antenna element arrangement as in claim 1 , wherein the dual-polarized antenna element arrangement has a wavelength λ of the operating frequency band, and wherein the maximum distance between in each case two opposite antenna element arrangements is less than or equal to the wavelength λ of the operating frequency band.
30. The dual-polarized antenna element arrangement as in claim 1 , wherein the dual-polarized antenna element arrangement has a wavelength λ of the operating frequency band, and wherein the length of the antenna element devices is less than or equal to the wavelength λ of the operating frequency band.
31. A dual polarized antenna element arrangement comprising:
at least four conductive antenna elements angularly displaced substantially at right angles from one another, each said element providing opposite ends; and
a conductive structure for each said element, said conductive structures electrically coupling said opposite ends of a respective element together,
said adjacent ends of adjacent ones of said elements being RF-isolated from one another, adjacent ends of adjacent ones of said at least four conductive antenna elements forming substantially symmetrical in-phase RF feed points for said antenna element arrangement.