4G built-in antenna

Abstract

The utility model relates to a 4G built-in antenna, which comprises a first radiation unit, a second radiation unit and a PI base material, the first radiation unit is provided with a first feeding point, the second radiation unit is provided with a second feeding point, and the 4G built-in antenna is characterized in that the first radiation unit comprises a body, a first horizontal extension part, a connecting part and a second horizontal extension part, one end of the first horizontal extension part is connected with the body, the other end of the first horizontal extension part is connected with the second horizontal extension part through the connecting part, a first gap exists between the first horizontal extension part and the body, and a second gap exists between the first horizontal extension part and the second horizontal extension part. A third gap exists between the second radiation unit and the second horizontal extension part. The second gap and the third gap are communicated at one end of the second horizontal extension part away from the connecting part. The structure of the 4G antenna enables the 4G antenna to have very good signal resonance and good antenna bandwidth, and the antenna is good in efficiency, good in transmission quality and high in receiving sensitivity.

Description

Technical Field

[0001] The utility model relates to an antenna, in particular to a 4G built-in antenna. Background Art

[0002] In recent years, wireless communication systems have been widely used in various fields. With the advancement of technology, the diversification of electronic product sizes, coupled with the surge in popularity of portable devices, the associated antennas must also be designed to be thinner, lighter, and shorter, easier to assemble, and provide excellent communication. To address the issue of missed calls and messages, the call flash mobile phone pendant features a communication antenna. Utility Model Content

[0003] The utility model designs a 4G built-in antenna, which solves the technical problem that the 4G antenna in the existing incoming call flash mobile phone pendant has poor efficiency, poor transmission quality and low receiving sensitivity.

[0004] In order to solve the above-mentioned technical problems, the present invention adopts the following solutions:

[0005] A 4G built-in antenna includes a first radiation unit, a second radiation unit and a PI substrate, the first radiation unit and the second radiation unit are provided on the PI substrate, the first radiation unit is provided with a first feeding point, and the second radiation unit is provided with a second feeding point, characterized in that: the first radiation unit includes a main body, a first horizontal extension, a connecting portion and a second horizontal extension, one end of the first horizontal extension is connected to the main body, and the other end of the first horizontal extension is connected to the second horizontal extension through the connecting portion, a first gap is provided between the first horizontal extension and the main body, a second gap is provided between the first horizontal extension and the second horizontal extension, a third gap is provided between the second radiation unit and the second horizontal extension, and the second gap and the third gap are connected at the end of the second horizontal extension away from the connecting portion.

[0006] Preferably, the body of the first radiation unit and the second radiation unit are semicircular in shape.

[0007] Preferably, the first radiation unit and the second radiation unit are single-sided electrolytic copper foil.

[0008] Preferably, the PI substrate, the first radiation unit and the second radiation unit are covered with ink protection layers of different colors.

[0009] Preferably, the first feed point has a gold-plated copper foil contact point for soldering the core wire of the coaxial line.

[0010] Preferably, the second feed point has a gold-plated copper foil contact point for soldering the ground wire of the coaxial line.

[0011] Preferably, the PI substrate is circular and made of FPC, PCB, plastic plate or metal plate.

[0012] Preferably, the 4G built-in antenna is located in a pendant of the mobile phone.

[0013] The 4G internal antenna has the following benefits:

[0014] The structure of the 4G antenna of the utility model enables it to have very good signal resonance and good antenna bandwidth, and the antenna has good efficiency, good transmission quality and high receiving sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 : Schematic diagram of the structure of the utility model 4G built-in antenna;

[0016] Figure 2 : Return loss test diagram of the utility model's 4G internal antenna;

[0017] Figure 3 : It is the Smith chart of the 4G internal antenna of the utility model;

[0018] Figure 4 : The voltage standing wave ratio of the 4G built-in antenna of the utility model.

[0019] Description of reference numerals:

[0020] 1—first radiation unit; 11—first horizontal extension portion; 12—connecting portion; 13—second horizontal extension portion; 14—first gap; 15—second gap; 16—third gap; 2—second radiation unit; 3—PI substrate; 4—first feeding point; 5—second feeding point. DETAILED DESCRIPTION

[0021] The following combination Figures 1 to 4 , the utility model is further described:

[0022] like Figure 1As shown, a 4G built-in antenna includes a first radiation unit 1, a second radiation unit 2 and a PI substrate 3, the first radiation unit 1 and the second radiation unit 2 are provided on the PI substrate 3, the first radiation unit 1 is provided with a first feeding point 4, and the second radiation unit 2 is provided with a second feeding point 5, the first radiation unit 1 includes a body, a first horizontal extension part 11, a connecting part 12 and a second horizontal extension part 13, one end of the first horizontal extension part 11 is connected to the body, and the other end of the first horizontal extension part 11 is connected to the second horizontal extension part 13 through the connecting part 12, a first gap 14 is provided between the first horizontal extension part 11 and the body, a second gap 15 is provided between the first horizontal extension part 11 and the second horizontal extension part 13, a third gap 16 is provided between the second radiation unit 2 and the second horizontal extension part 13, and the second gap 15 and the third gap 16 are connected at the end of the second horizontal extension part 13 away from the connecting part 12.

[0023] The main body of the first radiating element 1 and the second radiating element 2 are semicircular in shape. The first and second radiating elements 1 and 2 are made of single-sided electrolytic copper foil. The PI substrate, the first and second radiating elements are covered with protective layers of ink of different colors. The first feed point 4 has a gold-plated copper foil contact for soldering the core wire of the coaxial cable. The second feed point 5 has a gold-plated copper foil contact for soldering the ground wire of the coaxial cable. The PI substrate is circular and made of FPC, PCB, plastic board, or metal plate. The 4G internal antenna is located in the phone's pendant.

[0024] like Figure 2 As shown, the return loss of the 4G antenna of the utility model is within -10dB in the 698-1900 MHz range, and above -10dB in the 2100-2690 MHz range. This indicates that the antenna of the utility model has a very good signal resonance in the 698-2690 MHZ range and also has a good antenna bandwidth.

[0025] like Figure 3 As shown in FIG. 1 , the Smith chart of the antenna of the present invention has the upper half of the Smith chart being the inductance hemisphere, the lower half being the capacitance hemisphere, the middle horizontal axis being the pure resistance, and the ideal input impedance of the antenna being 50 ohms, i.e., the center point of the circle. Figure 3 The input impedance of the utility model antenna 698-2690MHZ is close to 50 ohms, very close to the center point.

[0026] like Figure 4 As shown in the figure, the voltage standing wave ratio of the antenna of the present invention is that the closer the standing wave ratio is to 1, the better the signal transmission efficiency is. In the figure, the voltage standing wave ratio of the antenna of the present invention at each low frequency point of 698-900MHZ is less than 3.5, and the standing wave ratio at the high frequency point of 1800-2690MHZ is within 1.5, so the antenna of the present invention has good efficiency.

[0027] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A 4G internal antenna, comprising a first radiation unit (1), a second radiation unit (2) and a PI substrate (3), wherein the first radiation unit (1) and the second radiation unit (2) are provided on the PI substrate (3), the first radiation unit (1) is provided with a first feeding point (4), and the second radiation unit (2) is provided with a second feeding point (5), characterized in that: The first radiation unit (1) comprises a body, a first horizontal extension portion (11), a connecting portion (12) and a second horizontal extension portion (13), one end of the first horizontal extension portion (11) is connected to the body, and the other end of the first horizontal extension portion (11) is connected to the second horizontal extension portion (13) through the connecting portion (12), a first gap (14) exists between the first horizontal extension portion (11) and the body, a second gap (15) exists between the first horizontal extension portion (11) and the second horizontal extension portion (13), a third gap (16) exists between the second radiation unit (2) and the second horizontal extension portion (13), and the second gap (15) and the third gap (16) are connected at an end of the second horizontal extension portion (13) away from the connecting portion (12).

2. The 4G internal antenna according to claim 1, wherein: The body of the first radiation unit (1) and the second radiation unit (2) are semicircular in shape.

3. The 4G internal antenna according to claim 2, wherein: The first radiation unit (1) and the second radiation unit (2) are single-sided electrolytic copper foils.

4. The 4G internal antenna according to claim 1, wherein: The PI substrate, the first radiation unit and the second radiation unit are covered with ink protection layers of different colors.

5. The 4G internal antenna according to claim 1, wherein: The first feed point (4) has a gold-plated copper foil contact point for soldering the core wire of the coaxial line.

6. The 4G internal antenna according to claim 1, wherein: The second feed point (5) has a gold-plated copper foil contact point for soldering the ground wire of the coaxial line.

7. The 4G internal antenna according to claim 1, wherein: The PI substrate is circular and made of FPC, PCB, plastic board or metal board.

8. The 4G internal antenna according to any one of claims 1 to 7, characterized in that: The 4G built-in antenna is located in the pendant of the mobile phone.

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