CN200953381Y - A base station antenna - Google Patents

Abstract

The utility model provides a base station antenna, applied to the communications field, which comprises a feeding network, a reflective plate, a radome support piece and a plurality of radiating elements, wherein the radome support piece and the radiating element is fixed on the reflective plate; the feeding network is the air microstrip medium structure and connected with the radiating element in the feeding excitation point of each radiating element. Adopting the integration structure of the combination between the feeding network of the air microstrip line structure and the radiating element of the plane structure, the utility model reduces the man-made welding spot, makes the antenna have the higher electrical performance index and the structure simple and flexible, and lowers the product cost.

Description

A base station antenna

technical field

The utility model belongs to the technical field of antennas, in particular to a base station antenna.

Background technique

With the development of mobile communication technology, higher and higher requirements are put forward for base station antennas in terms of producibility, low cost and high electrical performance. The manufacturability of the antenna requires that the production and assembly of the antenna be simpler, with fewer processes, and the parts are universal. The assembly process requires high precision and reduces human factors; low cost requires the design materials, processing and assembly of the antenna to have low cost advantages; The electrical performance requires that the designed antenna have the same or higher electrical performance indicators under the premise of simplicity and low cost.

In prior art 1, as shown in FIG. 1 , the feed network is a coaxial line feed, and the radiation unit is in the form of a half-wave oscillator. The impedance of the radiation unit of this antenna needs to match the transmission characteristic impedance of the coaxial line, so the design difficulty and requirements of the radiation unit are relatively high. The multi-radiating unit network of the array antenna is limited by the characteristic impedance of the coaxial line, so the flexibility is poor. In addition, the connection between the radiation unit of the array antenna and the feed network is welding, so the welding process needs to be strictly required to ensure the high performance and production quality of the antenna, but the welding is mostly manual, so the error is large, and the consistency of the product is difficult to control .

In prior art 2, as shown in FIG. 2 , the radiating unit has a planar structure, the feeding excitation adopts a slot coupling mode, and the feeding network is a microstrip dielectric structure or a microstrip plus coaxial line structure. The feeding network of this technology adopts a microstrip dielectric structure, and the material and processing costs are relatively high.

Utility model content

The purpose of the utility model is to provide a base station antenna with simple design and installation and high electrical performance index.

A base station antenna, the base station antenna comprising a feed network, a reflector, a radome support fixed on the reflector and a plurality of radiation units;

The feed network is an air microstrip dielectric structure, and is connected to the radiation units at the feed excitation points of each radiation unit.

The feed network and the radiation unit are distributed on both sides of the reflection plate, and the feed network is connected to the radiation unit through the via hole on the reflection plate.

The feed network and the lower radiation sheet of the radiation unit are connected by rivets or screws.

The strip line of the feed network is bent through the via hole on the reflector, and bent again under the lower radiation sheet of the radiating unit to form a plane parallel to the lower radiation sheet, the plane is in contact with the lower radiation sheet, There is a connection hole on the lower radiation sheet, and the lower radiation sheet is connected to the feed network through rivets or screws.

The feeding network is riveted with a round metal sheet at the bend parallel to the lower radiation sheet of the radiation unit, and a capacitor is formed between the round metal sheet and the lower radiation sheet.

The feed network and the radiation unit are distributed on one side of the reflector, and the feed network is bent and connected to the radiation unit.

The radome support and the plurality of radiation units are fixed to the reflector through the guide rails of the reflector.

The utility model adopts an integrated structure in which the feeding network of the air microstrip line structure is connected with the radiation unit of the planar structure, which reduces artificial solder joints, makes the antenna have a higher electrical performance index, is simple and flexible in structure, and reduces the product cost. cost.

Description of drawings

FIG. 1 is an antenna structure diagram of prior art 1;

FIG. 2 is an antenna structure diagram of the second prior art;

Fig. 3 is a structural diagram of the antenna array provided by the utility model;

Fig. 4 is a structural diagram of the antenna array radiation unit provided by the utility model;

Fig. 5 is a structural diagram of the feeding excitation point of the radiating unit in an embodiment of the present invention;

6 and 7 are structural diagrams of the feeding excitation point of the radiation unit in another embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

The utility model adopts an integrated structure in which the feeding network of the air microstrip line structure is connected with the radiation unit of the planar structure.

As shown in FIG. 3 , the base station antenna includes a reflector 1 , a plurality of radiation units 2 , a radome support 3 and a feed network 4 . The radiating unit 2 is located on the front of the reflecting plate 1, and the feeding network 4 is located on the back of the reflecting plate 1. There is a bend 4a at the feeding excitation point of each radiating unit, and an antenna input port 4b is also included. The feed network 4 adopts an air microstrip line structure, and the distance between the feed network 4 and the reflector 1 can be guaranteed by a fixed line card.

As shown in FIG. 4 , the radiating unit 2 includes an upper radiating sheet 5 and a lower radiating sheet 6 , and there are multiple radiating unit supports 7 and a metal grounding support 8 between the upper radiating sheet 5 and the lower radiating sheet 6 . There are multiple reflector guide rails 13 on both sides of the reflector 1 , fixing the radiation unit 2 , the radome support 3 and the reflector 1 .

FIG. 5 is a partial schematic diagram of the feed excitation point. The feed network 4 is connected to the radiation unit 2 on the front of the reflector 1 through the via hole 9 of the reflector 1 . The strip line of the feed network 4 is bent through the via hole 9 of the reflector 1, and bent again under the lower radiation sheet 6 to form a plane 4c parallel to the lower radiation sheet 6. The plane 4c is in contact with the lower radiation sheet 6, and the lower radiation sheet There is a rivet hole 10 on the 6, and the lower radiation sheet 6 and the feed network 4 are riveted together through the rivet 11. Of course, the feed network 4 and the lower radiation sheet 6 of the radiation unit 2 may also be connected by screws or other connection devices.

In another embodiment of the present utility model, as shown in FIGS. 6 and 7 , the connection between the feed network 4 and the radiation unit 2 adopts a capacitive coupling connection form. The bending plane 4c of the feeding network 4 is riveted with a circular metal sheet 12 through a rivet, and the circular metal sheet 12 forms a capacitor with the lower radiation unit 6 .

In the present utility model, the feed network 4 and the radiation unit 2 can also be located on the same side of the reflector 1, that is, they are located on the front of the reflector 1 at the same time, and the feed network 4 is bent below the radiation unit 2 to be connected with the lower radiation sheet 6. The connection method is the same as that of the above embodiment, and will not be repeated here.

The utility model is not only suitable for single-polarization array antennas, but also for multi-polarization array antennas.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (7)

1. A base station antenna, characterized in that the base station antenna includes a feed network, a reflector, a radome support and a plurality of radiation units fixed on the reflector; The feed network is an air microstrip dielectric structure, and is connected to the radiation units at the feed excitation points of each radiation unit. 2. The base station antenna according to claim 1, wherein the feed network and the radiation unit are distributed on both sides of the reflector, and the feed network is connected to the radiation unit through a via hole on the reflector. 3. The base station antenna according to claim 2, characterized in that, the feed network and the lower radiation piece of the radiation unit are connected by rivets or screws. 4. The base station antenna according to claim 3, wherein the strip line of the feed network is bent through the via hole on the reflector, and bent again under the lower radiation piece of the radiation unit to form a A plane parallel to the lower radiation sheet, the plane is in contact with the lower radiation sheet, a connection hole is formed on the lower radiation sheet, and the lower radiation sheet is connected to the feed network through rivets or screws. 5. The base station antenna according to claim 2, characterized in that, the feeding network is riveted with a round metal sheet at the bend parallel to the lower radiation sheet of the radiating unit, between the round metal sheet and the lower radiation sheet form a capacitor. 6. The base station antenna according to claim 1, wherein the feed network and the radiation unit are distributed on one side of the reflector, and the feed network is bent and connected to the radiation unit. 7. The base station antenna according to claim 1, wherein the radome support and the plurality of radiation units are fixed to the reflector through guide rails of the reflector.

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