Feed network of base station antenna, base station antenna, and base station

1. A stripline cavity structure, used for an antenna, wherein the stripline cavity structure comprises:

a second conductor strip;

a first ground plate, a second ground plate, and a baffle plate, wherein a first end of the first ground plate is perpendicularly connected to a reflecting plate of the antenna, a first end of the second ground plate is perpendicularly connected to the reflecting plate, one end of the baffle plate is connected to a second end of the first ground plate, and another end of the baffle plate is connected to a second end of the second ground plate; and

wherein the stripline cavity structure is set at a side of the reflecting plate of the antenna, a plurality of avoidance holes are set on the reflecting plate, the plurality of avoidance holes are used for the second conductor strip to pass through and to be connected to a first conductor strip in a microstrip circuit for the antenna, and the first conductor strip is set at another side of the reflecting plate.

2. The stripline cavity structure according to claim 1 , wherein the baffle plate comprises a slot, wherein the slot is parallel to the first ground plate and is located on an inner plane of the cavity structure, and wherein a position of the slot corresponds to positions of at least some of the plurality of avoidance holes that are linearly arranged.

3. The stripline cavity structure according to claim 2 , wherein the baffle plate further comprises an opening groove, and wherein the opening groove is perpendicular to the slot.

4. The stripline cavity structure according to claim 1 , wherein the first ground plate, the second ground plate, and the baffle plate are integrally formed.

5. The stripline cavity structure according to claim 1 , wherein the stripline cavity structure further comprises a sliding medium, wherein the sliding medium is disposed on a side of the second conductor strip, and wherein the sliding medium is slidable on the second conductor strip.

6. The stripline cavity structure according to claim 5 , wherein one end of the second conductor strip has a convex structure, and wherein the convex structure is used to pass through the first avoidance holes to be electrically connected to the first conductor strip.

7. The stripline cavity structure according to claim 6 , wherein the second conductor strip comprises a first convex structure on one end of the second conductor strip and a second convex structure on the other end of the second conductor strip, and wherein the sliding medium is slidable on the second conductor strip between the first convex structure and the second convex structure.

8. The stripline cavity structure according to claim 1 , wherein the second conductor strip is a Printed Circuit Board (PCB) structure.

9. A feed network of a base station antenna, the feed network comprising:

a stripline cavity structure and a microstrip, wherein the stripline cavity structure is disposed on a surface of a reflecting plate of the antenna, and wherein first avoidance holes are provided on the reflecting plate;

wherein the stripline cavity structure comprises a second conductor strip, a first ground plate, a second ground plate, and a baffle plate, wherein a first end of the first ground plate is perpendicularly connected to a reflecting plate of the antenna, a first end of the second ground plate is perpendicularly connected to the reflecting plate, one end of the baffle plate is connected to a second end of the first ground plate, and another end of the baffle plate is connected to a second end of the second ground plate; and

wherein the first avoidance holes are used for the second conductor strip to pass through to be connected to a first conductor strip in the microstrip circuit, and wherein the first conductor strip is disposed on the other surface of the reflecting plate.

10. The feed network of a base station antenna according to claim 9 , wherein the feed network comprises N stripline cavity structures, wherein N is an integer greater than or equal to 2, wherein signal transmission frequencies of second conductor strips in the N stripline cavity structures are different, and wherein the microstrip circuit is a combiner.

11. The feed network of a base station antenna according to claim 9 , wherein the feed network comprises N stripline cavity structures, wherein N is an integer greater than or equal to 2, wherein signal transmission frequencies of second conductor strips in the N stripline cavity structures are the same, and wherein the microstrip circuit is a power splitter.

12. A base station antenna, comprising:

an antenna array with a reflecting plate, a microstrip circuit and a stripline cavity structure, wherein the stripline cavity structure is set at a side of the reflecting plate, and wherein a plurality of avoidance holes are set on the reflecting plate;

wherein the stripline cavity structure comprises a second conductor strip;

wherein the plurality of avoidance holes are used for the second conductor strip to pass through and to be connected to a first conductor strip in the microstrip circuit, and wherein the first conductor strip is set at another side of the reflecting plate; and

wherein the stripline cavity structure further comprises a first ground plate, a second ground plate, and a baffle plate, a first end of the first ground plate is perpendicularly connected to the reflecting plate, a first end of the second ground plate is perpendicularly connected to the reflecting plate, one end of the baffle plate is connected to a second end of the first ground plate, and another end of the baffle plate is connected to a second end of the second ground plate.

13. A base station, comprising the base station antenna according to claim 12 .