CN213936532U - Small-sized double-frequency single-feed built-in antenna - Google Patents

Abstract

The utility model provides a built-in antenna is presented to small-size dual-frenquency list, it includes a PCB base plate, corrodes on this PCB base plate and is formed with 2.4GHz and 5GHz radiating element. The PCB substrate is an FR-4 or 22F substrate board with a single-sided copper-clad layer, and is 10-12 mm wide and 18-20 mm long. The 2.4GHz radiating unit comprises 2.4GHz dipoles A and A ', the 2.4GHz dipole A is 25-35 mm in unfolded length and irregular in shape, and the 2.4GHz dipole A' is a ground wire of a coaxial cable connected with the antenna. The 5GHz radiation unit comprises 5GHz dipoles B and B' with the unfolding length of 12-16 mm and irregular shapes. The 2.4GHz dipole A and the 5GHz dipole B are connected with a signal wire of the coaxial cable; the 5GHz dipole B' is connected with the ground wire of the coaxial cable. The utility model has the characteristics of it is miniaturized, low-cost.

Description

Small-sized double-frequency single-feed built-in antenna

Technical Field

The utility model relates to a built-in antenna is presented to small-size dual-frenquency list belongs to antenna manufacturing technical field.

Background

With the rapid development of communication and electronic technologies, various antennas have been widely applied to terminal devices such as smart phones, navigation devices, and wireless routers, and the antenna style and size are mostly designed according to the performance requirements of the terminal devices and the antenna usage environment. As the terminal equipment is smaller and smaller, the manufacturers of the terminal equipment require the built-in antenna provided by the antenna manufacturer to satisfy the communication performance, and the smaller the built-in antenna, the better the built-in antenna, so as to adapt to the small volume of the terminal equipment!

At present, the built-in PCB area etched with dipoles of 2.4GHz and 5GHz is large, and the built-in PCB area is generally 20x30mm or 50x20mm, and the built-in PCB area cannot meet the installation requirements of small-size terminal equipment.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a small dual-band single feed internal antenna.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a small-size dual-band single-feed built-in antenna is characterized in that: the PCB comprises a PCB substrate, wherein a 2.4GHz radiation unit and a 5GHz radiation unit are directly formed on the PCB substrate by corrosion; the 2.4GHz radiating unit comprises 2.4GHz dipoles A and A ', and the 5GHz radiating unit comprises 5GHz dipoles B and B';

the PCB substrate is an FR-4 substrate board or a 22F substrate board with a single-sided copper coating, the width of the PCB substrate is 10-12 mm, and the length of the PCB substrate is 18-20 mm;

the unfolding lengths of the 5GHz dipoles B and B 'are both 12-16 mm, and the shapes of the dipoles B and B' are irregular;

directly corroding a dipole C with an unfolded length of 13-19 mm and an irregular shape on the PCB substrate and close to the 5GHz dipole B;

the 5GHz dipole B and the dipole C jointly form the 2.4GHz dipole A, and the 2.4GHz dipole A is 25-35 mm in unfolded length and irregular in shape; the 2.4GHz dipole A' is a ground wire of the coaxial cable;

the 5GHz dipoles B are all connected with signal wires of the coaxial cables; and the 5GHz dipole B' is connected with the ground wire of the coaxial cable to form the double-frequency single-feed antenna.

In the preferred embodiment of the present invention, a signal line connection region and a ground line connection region are etched on the PCB substrate; the 5GHz dipole B is connected with a signal wire of a coaxial cable in a welding mode through the signal wire connecting area; and the 5GHz dipole B' is connected with the ground wire of the coaxial cable in a welding way through the ground wire connecting area.

The utility model has the advantages that: 1. the size is small, and the application range is wide; 2. the cost is low, and the cost performance is high; 3. simple processing and easy mass production.

Drawings

FIG. 1 is a PCB substrate diagram of the small-sized dual-band single-feed built-in antenna of the present invention;

fig. 2 is an explanatory view of the radiation unit of the present invention;

fig. 3 is a schematic view of the connection relationship between the radiation unit and the coaxial cable of the present invention.

Detailed Description

The structure and features of the present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that various modifications can be made to the embodiments disclosed herein, and therefore, the embodiments disclosed in the present specification should not be considered as limitations of the present invention, but merely as exemplifications of the embodiments, which are intended to make the features of the present invention apparent.

As shown in fig. 1 and 2, the utility model discloses a small-size dual-frenquency single-feed built-in antenna includes 2.4GHz radiating element and 5GHz radiating element that the direct corrosion formed on PCB base plate 1, PCB base plate 1.

The PCB substrate 1 is an FR-4 substrate board or a 22F substrate board with a single-sided copper-clad layer, the width W of the PCB substrate is 10-12 mm, and the length L of the PCB substrate is 18-20 mm.

The 2.4GHz radiating element comprises 2.4GHz dipoles A and A ', and the 5GHz radiating element comprises 5GHz dipoles B and B'.

5GHz dipoles B and B' with the spreading length of 12-16 mm and irregular shapes are directly formed on the PCB substrate 1 by corrosion.

The 2.4GHz dipole A is irregular in shape, and the unfolding length of the dipole A is 25-35 mm; the 2.4GHz dipole A' is the ground wire of the coaxial cable 2. In the embodiment of the present invention, on the PCB substrate 1, the close proximity dipole B is directly corroded by the dipole C having an expansion length of 13-19 mm and an irregular shape, and the dipole B and the dipole C jointly form the dipole A of 2.4 GHz.

As shown in fig. 3, the 5GHz dipole B on the PCB substrate 1 is soldered to the signal line of the coaxial cable 2; the 5GHz dipole B' is connected with the ground wire of the coaxial cable 2 in a welding mode to form the dual-frequency single-feed antenna.

For the mounting dimension requirement who satisfies terminal equipment, the utility model discloses reduce the size of PCB base plate as far as possible. Because the size of PCB base plate is less, for realizing the receiving and dispatching of 2.4GHz, the dual-band signal best performance of 5GHz, the utility model discloses all design into irregular shape with 2.4GHz dipole A, 5GHz dipole B and B', when corroding the formation dipole, make it be covered with the PCB base plate as far as possible.

In the manufacturing process, a signal wire connecting area 3 and a ground wire connecting area 4 are corroded on the PCB substrate, and a 5GHz dipole B is welded and connected with a signal wire of a coaxial cable through the signal wire connecting area 3; the 5GHz dipole B' is connected with the ground wire of the coaxial cable through the ground wire connecting area 4 in a welding mode.

The utility model has the advantages that: 1. the size is small, and the application range is wide; 2. the cost is low, and the cost performance is high; 3. simple processing and easy mass production.

Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (2)

1. A small-size dual-band single-feed built-in antenna is characterized in that: the PCB comprises a PCB substrate, wherein a 2.4GHz radiation unit and a 5GHz radiation unit are directly formed on the PCB substrate by corrosion; the 2.4GHz radiating unit comprises 2.4GHz dipoles A and A ', and the 5GHz radiating unit comprises 5GHz dipoles B and B';

the PCB substrate is an FR-4 substrate board or a 22F substrate board with a single-sided copper coating, the width of the PCB substrate is 10-12 mm, and the length of the PCB substrate is 18-20 mm;

the unfolding lengths of the 5GHz dipoles B and B 'are both 12-16 mm, and the shapes of the dipoles B and B' are irregular;

directly corroding a dipole C with an unfolded length of 13-19 mm and an irregular shape on the PCB substrate and close to the 5GHz dipole B;

the 5GHz dipole B and the dipole C jointly form the 2.4GHz dipole A, and the 2.4GHz dipole A is 25-35 mm in unfolded length and irregular in shape; the 2.4GHz dipole A' is a ground wire of the coaxial cable;

the 5GHz dipoles B are all connected with signal wires of the coaxial cables; and the 5GHz dipole B' is connected with the ground wire of the coaxial cable to form the double-frequency single-feed antenna.

2. The small-sized dual-band single-feed internal antenna according to claim 1, wherein: corroding a signal wire connecting area and a ground wire connecting area on the PCB substrate;

the 5GHz dipole B is connected with a signal wire of a coaxial cable in a welding mode through the signal wire connecting area;

and the 5GHz dipole B' is connected with the ground wire of the coaxial cable in a welding way through the ground wire connecting area.

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