CN204407488U - Can the inverted-F antenna for mobile phone of broadening high frequency bandwidth - Google Patents

Abstract

The utility model discloses an inverted F-shaped mobile phone antenna capable of widening the high-frequency bandwidth, which includes an antenna body, first to second parasitic antennas, the first and second parasitic antennas are parallel, the antenna body includes L-shaped and F-shaped parts, and the antenna The L-shaped part of the body includes first to second antenna bodies, the F-shaped part of the antenna body includes third to fifth antenna bodies, the first antenna body is perpendicular to the second antenna body, and the second end of the first antenna body is connected to the second antenna body. The first end of the antenna body is connected, the first end of the first antenna body is connected to the first end of the third antenna body, the second to fourth antenna bodies are parallel to each other, the third antenna body is perpendicular to the fifth antenna body, and the third antenna body is perpendicular to the fifth antenna body. The second end of the antenna body is connected to the first end of the fifth antenna body, and the second end of the fourth antenna body is connected to the fifth antenna body. The combined effect of the first parasitic antenna, the second parasitic antenna and the antenna body of the utility model can widen the high-frequency bandwidth of the mobile phone antenna and improve the performance of the mobile phone antenna.

Description

An Inverted-F Mobile Phone Antenna That Can Broaden High Frequency Bandwidth

technical field

The utility model relates to a mobile phone antenna, in particular to an inverted F-shaped mobile phone antenna capable of widening the high-frequency bandwidth.

Background technique

With the development of science and technology, the size of mobile phones is getting smaller and smaller, and the body is getting thinner and lighter. While mobile phone products are pursuing lightweight and miniaturization, the available space inside the mobile phone will inevitably decrease, which has a negative impact on the characteristics of the antenna. Adverse effects are likely to cause poor antenna transmission and reception signals. The structure diagram of the existing mobile phone antenna is shown in Figure 1, and the corresponding waveform diagram is shown in Figure 2. Due to space limitations and other physical constraints, the existing mobile phone antennas cause the characteristics of the antenna to decline, and the high-frequency band of the antenna is narrow, which cannot meet the needs of products for communication on a wider frequency band. Therefore, it is necessary to provide a new mobile phone antenna to solve the above problems.

Utility model content

The purpose of the utility model is to provide an inverted F-shaped mobile phone antenna capable of widening the high-frequency bandwidth of the mobile phone antenna.

In order to achieve the above object, the technical scheme adopted in the utility model is as follows:

An inverted F-shaped mobile phone antenna capable of widening the high-frequency bandwidth includes an antenna body, and the inverted F-shaped mobile phone antenna also includes a first parasitic antenna and a second parasitic antenna, and the first parasitic antenna is located between the antenna body and the antenna body. Between the second parasitic antenna, the first parasitic antenna and the second parasitic antenna are parallel to each other, the antenna body includes an L-shaped part and an F-shaped part integrally formed and connected, and the L-shaped part of the antenna body includes a first An antenna body and a second antenna body, the F-shaped part of the antenna body includes a third antenna body, a fourth antenna body and a fifth antenna body, the first antenna body is perpendicular to the second antenna body, and the first antenna body is perpendicular to the second antenna body. The second end of an antenna body is connected to the first end of the second antenna body, the first end of the first antenna body is connected to the first end of the third antenna body, the third antenna body, The fourth antenna body and the second antenna body are parallel to each other, the third antenna body is perpendicular to the fifth antenna body, the second end of the third antenna body is connected to the first end of the fifth antenna body One end is connected, the second end of the fourth antenna body is connected to the fifth antenna body, and the fifth antenna body and the first parasitic antenna are parallel to each other.

Preferably, the antenna body is mounted on an antenna bracket, and the antenna bracket is mounted on a circuit board, and the circuit board is provided with a clearance area at an end close to the antenna bracket.

Preferably, the fifth antenna body is bent and its part close to the second end is located at the bottom of the clear space.

Preferably, the lengths of the third antenna body, the fourth antenna body and the second antenna body decrease in sequence.

Preferably, the circuit board has a length of 120mm and a width of 55mm, the headroom has a length of 55mm and a width of 15mm, the antenna support is rectangular, including a long side and a wide side, and the length of the long side is 55mm. The length of the wide side is 7mm.

Preferably, the first antenna body is parallel to the wide side of the antenna bracket, the widths of the first to fifth antenna bodies are all 1-2 mm, the length of the first antenna body is 7 mm, and the second antenna body The length of the body is 15mm, the length of the third antenna body is 40mm, the length of the fourth antenna body is 25mm, the length of the fifth antenna body is greater than 7mm, and the distance from the fifth antenna body to the broadside of the clearance area is 10mm.

Preferably, the distance between the first parasitic antenna and the second parasitic antenna is 0.4mm, and the distance between the second parasitic antenna and the wide side of the clear space is 4.7mm.

Compared with the prior art, the beneficial effect of the inverted F-shaped mobile phone antenna that can widen the high-frequency bandwidth of the utility model is that: the combined effect of the first parasitic antenna, the second parasitic antenna and the antenna body can widen the antenna of the mobile phone. High frequency bandwidth, improve the performance of mobile phone antenna.

Description of drawings

Fig. 1 is the structure schematic diagram of existing mobile phone antenna after installation;

Fig. 2 is the waveform diagram of existing mobile phone antenna;

Fig. 3 is the structure schematic diagram after the installation of the inverted F-shaped mobile phone antenna of the utility model that can widen the high-frequency bandwidth;

Fig. 4 is a partial schematic diagram of Fig. 3;

Fig. 5 is a waveform diagram of an inverted F-shaped mobile phone antenna capable of widening the high-frequency bandwidth of the present invention.

1. The antenna body; 101. The first antenna body; 102. The second antenna body; 103. The third antenna body; 104. The fourth antenna body; 105. The fifth antenna body; 2. The first parasitic antenna; 3. The second antenna body 2. Parasitic antenna; 4. Antenna bracket; 5. Circuit board; 501. Clearance area.

Detailed ways

The utility model is further described below in conjunction with specific embodiments.

Please refer to Fig. 1 to Fig. 5, the inverted F-shaped mobile phone antenna of the utility model that can widen the high-frequency bandwidth includes an antenna body 1, and the inverted F-shaped mobile phone antenna also includes a first parasitic antenna 2 and a second parasitic antenna 3, The first parasitic antenna 2 is located between the antenna body 1 and the second parasitic antenna 3, the first parasitic antenna 2 and the second parasitic antenna 3 are parallel to each other, and the antenna body 1 includes an integrally formed and connected L-shaped part and F-shaped part, the L-shaped part of the antenna body 1 includes a first antenna body 101 and a second antenna body 102, and the F-shaped part of the antenna body 1 includes a third antenna body 103, a fourth antenna body 104 and the fifth antenna body 105 .

Wherein, the first antenna body 101 is perpendicular to the second antenna body 102, the second end of the first antenna body 101 is connected to the first end of the second antenna body 102, and the first antenna body The first end of 101 is connected to the first end of the third antenna body 103, the third antenna body 103, the fourth antenna body 104 and the second antenna body 102 are parallel to each other, and the third antenna body The lengths of the main body 103 , the fourth antenna main body 104 , and the second antenna main body 102 decrease sequentially. The third antenna body 103 is perpendicular to the fifth antenna body 105, the second end of the third antenna body 103 is connected to the first end of the fifth antenna body 105, and the fourth antenna body 104 The second end is connected to the fifth antenna body 105 , and the fifth antenna body 105 and the first parasitic antenna 2 are parallel to each other.

In this embodiment, the antenna body 1 is installed on the antenna bracket 4 , and the antenna bracket 4 is installed on the circuit board 5 , and the circuit board 5 is provided with a clearance area 501 at one end close to the antenna bracket 4 . The fifth antenna body 105 is bent and its portion close to the second end is located at the bottom of the clearance area 501 .

The length of the circuit board 5 is 120 mm, and the width is 55 mm. The length of the headroom 501 is 55 mm, and the width is 15 mm. The antenna support 4 is a rectangle, including a long side and a wide side, and the length of the long side is 55 mm. The length of the wide side is 7mm. The first antenna body 101 is parallel to the broadside of the antenna support 4, the width of the first to fifth antenna bodies 105 is 1-2mm, the length of the first antenna body 101 is 7mm, and the second The length of the antenna body 102 is 15mm, the length of the third antenna body 103 is 40mm, the length of the fourth antenna body 104 is 25mm, the length of the fifth antenna body 105 is greater than 7mm, and the fifth antenna body 105 reaches the clearance area. The distance between the wide sides of 501 is 10mm. The distance between the first parasitic antenna 2 and the second parasitic antenna 3 is 0.4 mm, and the distance between the second parasitic antenna 3 and the wide side of the clearance area 501 is 4.7 mm.

In specific applications, on the basis of the wiring position and size design of the above-mentioned first parasitic antenna 2, second parasitic antenna 3 and antenna body 1, a relatively narrow bandwidth is debugged in the high-frequency part, and by adjusting the antenna The wiring position of the body 1 calls out a third harmonic of a low-frequency wave, which expands the high-frequency bandwidth. Finally, the coupling between the first parasitic antenna 2 and the second parasitic antenna 3 and the antenna body 1 generates resonance, thereby enhancing radiation and reducing the high frequency The frequency bandwidth is further expanded, and finally the purpose of expanding the high-frequency bandwidth is achieved. The waveform diagram of the mobile phone antenna described in the utility model is as shown in Figure 5, as can be seen from Figure 5, the range that the -5dB high frequency bandwidth of the mobile phone antenna described in the utility model can cover is the 1.7GHz-2.85GHz part, the high frequency The belt is wider.

The above schematically describes the utility model and its implementation, which is not restrictive, and what is shown in the accompanying drawings is only one implementation of the utility model, and the actual structure is not limited thereto. Therefore, if a person of ordinary skill in the art is inspired by it, and without departing from the purpose of the invention of the utility model, without creatively designing a structural mode and an embodiment similar to the technical solution, it shall belong to the utility model. protected range.

Claims (7)

1. An inverted F-shaped mobile phone antenna that can extend a wide high-frequency bandwidth, comprising an antenna body, is characterized in that: the inverted F-shaped mobile phone antenna also includes a first parasitic antenna and a second parasitic antenna, and the first parasitic antenna is located at Between the antenna body and the second parasitic antenna, the first parasitic antenna and the second parasitic antenna are parallel to each other, the antenna body includes an L-shaped part and an F-shaped part integrally formed and connected, and the antenna body The L-shaped part includes a first antenna body and a second antenna body, the F-shaped part of the antenna body includes a third antenna body, a fourth antenna body and a fifth antenna body, and the first antenna body is perpendicular to the second antenna body. The antenna body, the second end of the first antenna body is connected to the first end of the second antenna body, the first end of the first antenna body is connected to the first end of the third antenna body, and the The third antenna body, the fourth antenna body and the second antenna body are parallel to each other, the third antenna body is perpendicular to the fifth antenna body, the second end of the third antenna body is parallel to the The first end of the fifth antenna body is connected, the second end of the fourth antenna body is connected to the fifth antenna body, and the fifth antenna body and the first parasitic antenna are parallel to each other. 2. the inverted F-shaped mobile phone antenna that can expand the high-frequency bandwidth as claimed in claim 1 is characterized in that: the antenna body is installed on the antenna bracket, and the antenna bracket is installed on the circuit board, and the circuit board is mounted on the A clearance area is provided at one end close to the antenna bracket. 3. The inverted F-shaped mobile phone antenna capable of widening the high-frequency bandwidth as claimed in claim 2, wherein the fifth antenna body is bent and its part close to the second end is located at the bottom of the clearance area. 4. The inverted F-shaped mobile phone antenna capable of widening the high-frequency bandwidth as claimed in claim 3, wherein the lengths of the third antenna body, the fourth antenna body, and the second antenna body decrease successively. 5. the inverted F-shaped mobile phone antenna that can widen the high frequency bandwidth as claimed in claim 4, is characterized in that: the length of described circuit board is 120mm, and width is 55mm, and the length of described headroom is 55mm, and width is 15mm , the antenna bracket is a rectangle, including a long side and a wide side, the length of the long side is 55mm, and the length of the wide side is 7mm. 6. The inverted F-shaped mobile phone antenna capable of widening the high-frequency bandwidth as claimed in claim 5, wherein: the first antenna body is parallel to the broadside of the antenna support, and the first to fifth antenna bodies The width of the antenna body is 1-2mm, the length of the first antenna body is 7mm, the length of the second antenna body is 15mm, the length of the third antenna body is 40mm, the length of the fourth antenna body is 25mm, and the length of the fifth antenna body The length of the fifth antenna body is greater than 7mm, and the distance from the fifth antenna body to the wide side of the clearance area is 10mm. 7. The inverted F-shaped mobile phone antenna capable of widening the high-frequency bandwidth as claimed in claim 6, characterized in that: the distance between the first parasitic antenna and the second parasitic antenna is 0.4mm, and the second parasitic antenna The distance to the broad side of the headroom is 4.7 mm.