CN210350092U

CN210350092U - FPC bluetooth antenna

Info

Publication number: CN210350092U
Application number: CN201921727697.7U
Authority: CN
Inventors: 马冬冬; 夏兴喜
Original assignee: Shenzhen Feimin Technology Co ltd
Current assignee: Shenzhen Feimin Technology Co ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-04-17
Anticipated expiration: 2029-10-15

Abstract

The utility model provides a FPC bluetooth antenna, include: the antenna comprises an antenna radiation unit (1), an FPC substrate (2), a first pin (3) and a second pin (4); the FPC substrate (2) is of a hollowed annular sheet structure and comprises a first surface and a second surface which are opposite; the antenna radiation unit (1) is positioned on the first surface of the FPC substrate (2) and arranged along the circumferential direction of the FPC substrate (2); one of the first pin (3) and the second pin (4) is a feed pin, and the other pin is a grounding pin. The first pin (3) and the second pin (4) are electrically connected with the antenna radiation unit (1). The utility model discloses a set up the antenna of specific length and form on FPC flexible substrate. The length of the pin is adjusted so as to optimize the impedance matching performance of the antenna, thereby adjusting the working frequency band and obtaining good transceiving performance.

Description

FPC bluetooth antenna

Technical Field

The utility model relates to an electronic components field especially relates to a FPC bluetooth antenna.

Technical Field

With the development of wireless communication technology and the requirement of beauty, the antenna on the wireless terminal equipment is gradually changed from an external type to a built-in type, such as a mobile phone, a PDA, a notebook computer and the like. However, due to the portable nature of wireless terminal devices, there are often stringent volume requirements. Thereby limiting the internal space of the wireless terminal device. The built-in antenna of the existing wireless terminal equipment is often low in radiation efficiency and poor in transceiving performance under a small size, so that a transceiving circuit corresponding to the antenna consumes excessive electric quantity when working, and the endurance of the wireless terminal equipment is poor. How to design a compact high-performance built-in antenna in a limited space is a technical problem that needs to be solved urgently in the industry.

SUMMERY OF THE UTILITY MODEL

In order to achieve the above purpose, the technical solutions provided in the embodiments of the present application are as follows:

a FPC (Flexible Printed Circuit) Bluetooth antenna comprising: the antenna comprises an antenna radiation unit 1, an FPC substrate 2, a first pin 3 and a second pin 4; the FPC substrate 2 is a hollowed annular sheet structure and comprises a first surface and a second surface which are opposite; the antenna radiation unit 1 is positioned on the first surface of the FPC substrate 2 and arranged along the circumferential direction of the FPC substrate 2; one of the first pin 3 and the second pin 4 is a feeding pin, and the other is a grounding pin. One end of the first pin 3 and one end of the second pin 4 are electrically connected with the antenna radiation unit 1.

Preferably, the lengths of the first pin 3 and the second pin 4 are 8-20 mm.

Preferably, the second surface of the FPC substrate 2 is provided with a back adhesive 5.

Preferably, the length of the antenna radiating element 1 is a quarter wavelength at the resonant frequency of the medium.

Preferably, the width of the antenna radiation unit 1 is equal to or less than the width of the FPC substrate 2.

Preferably, the whole thickness of FPC bluetooth antenna is controlled to be 0.05 ~ 0.5 mm.

Preferably, the FPC substrate 2 has a polygonal cross section.

Preferably, the cross section of the FPC substrate 2 is one of circular, and square.

Preferably, the FPC substrate 2 further includes a first positioning indentation 21 and/or a second positioning indentation 22.

A wireless communication device comprises an FPC Bluetooth antenna.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses a set up the antenna of specific length and form on FPC flexible substrate. The length of the pin is adjusted so as to optimize the impedance matching performance of the antenna, thereby adjusting the working frequency band and obtaining good transceiving performance. The utility model discloses a FPC bluetooth antenna has many based on the advantage that rigid printed circuit board antenna does not possess, and it can freely be crooked, convolute, folding, can require arbitrary arrangement according to spatial layout to remove wantonly and stretch out and draw back in three-dimensional space, thereby reach the requirement of the integration that components and parts assembly and wire are connected. It is particularly suitable for use in compact portable electronic devices such as TWS (true Wireless stereo) Bluetooth headsets and miniature Bluetooth players.

Drawings

Fig. 1 is a schematic view of a first surface of the present invention;

fig. 2 is a schematic view of a second surface of the present invention.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

As shown in fig. 1-2, the present invention provides a FPC bluetooth antenna in a preferred embodiment. Specifically, the method comprises the following steps: the antenna comprises an antenna radiation unit 1, an FPC substrate 2, a first pin 3 and a second pin 4. The FPC substrate 2 is an annular sheet structure with a hollow middle part and comprises a first surface and a second surface which are opposite. The antenna radiation unit 1 is located on the first surface of the FPC substrate 2, and is disposed along the circumferential direction of the FPC substrate 2. The antenna radiation element 1 has two pins, a first pin 3 and a second pin 4. One of which is a feed pin and the other of which is a ground pin. For example, the first pin 3 is a feeding pin, and the second pin 4 is a grounding pin. Alternatively, the first pin 3 is a ground pin and the second pin 4 is a feed pin. One end of the first pin 3 and one end of the second pin 4 are electrically connected with the antenna radiation unit 1.

The connection position of the first pin 3 and the second pin 4 to the antenna radiation element 1 may be an end portion of the antenna radiation element 1. Optionally, the connection positions of the first pin 3 and the second pin 4 with the antenna radiation unit 1 may also be adjusted on the antenna radiation unit 1 according to actual needs, so as to tune the antenna to a target frequency band.

The open ends of the first pin 3 and the second pin 4 are connected to a transceiver of the wireless communication device.

Because the utility model discloses a FPC bluetooth antenna size is less, and FPC base plate 2 is flexible material, consequently can't set up passive matching circuit on the base plate. Therefore, the utility model discloses utilize the input impedance of reactance component adjustment antenna that first pin 3, second pin 4 itself introduced. Specifically, the input impedance of the antenna can be adjusted by adjusting the lengths of the first pin 3 and the second pin 4. Preferably, the lengths of the first pin 3 and the second pin 4 are 8-20 mm.

The FPC substrate 2 is in an annular sheet shape, and the middle area of the FPC substrate is in a hollow structure. The FPC board 2 may be formed of a common flexible polymer film such as Polyimide (PI). The back surface of the FPC substrate 2 may be provided with a back adhesive 5 as necessary. The cross section of the FPC substrate 2 and the hollow structure formed in the middle area of the FPC substrate 2 can be freely adjusted according to the installation environment. For example, it may be polygonal, or a common geometric figure, such as one of a circle, or square.

The FPC substrate 2 may be provided with the first positioning notch 21 and/or the second positioning notch 22 according to the mounting requirement. The first positioning notch 21 and the second positioning notch 22 can indicate the mounting position of the FPC board 2.

The length of the antenna radiating element 1 is a quarter wavelength at the resonant frequency of the medium. The utility model discloses a FPC bluetooth antenna working frequency channel is 2.45 GHz. The width of the antenna radiation unit 1 is equal to or less than the width of the FPC substrate 2. The antenna radiation element 1 may be made of a common conductive material, such as a metal foil formed of copper, aluminum, gold, silver, or conductive ink. The utility model discloses a whole thickness control of FPC bluetooth antenna is 0.05 ~ 0.5mm, conveniently integrates to in the portable electronic equipment of compact. Such as tws (true Wireless stereo) bluetooth headsets and micro bluetooth players.

The utility model discloses a FPC bluetooth antenna performance is shown with prior art looks for the following table:

parameter(s)	Return loss at 2.45GHz	VSWR at 2.45GHz
			The utility model discloses	10.88dB	1.8
Prior Art	7.36dB	2.5

Therefore, adopt the utility model discloses a scheme promotes obviously to antenna performance.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a FPC bluetooth antenna which characterized in that: the method comprises the following steps: the antenna comprises an antenna radiation unit (1), an FPC substrate (2), a first pin (3) and a second pin (4); the FPC substrate (2) is of an annular sheet structure with a hollow middle part and comprises a first surface and a second surface which are opposite; the antenna radiation unit (1) is positioned on the first surface of the FPC substrate (2) and arranged along the circumferential direction of the FPC substrate (2); one of the first pin (3) and the second pin (4) is a feed pin, and the other pin is a grounding pin; one end of the first pin (3) and one end of the second pin (4) are electrically connected with the antenna radiation unit (1).

2. The FPC Bluetooth antenna of claim 1, wherein: the length of the first pin (3) and the length of the second pin (4) are 8-20 mm.

3. The FPC Bluetooth antenna of claim 1, wherein: the second surface of the FPC substrate (2) is provided with a back adhesive (5).

4. The FPC Bluetooth antenna of claim 1, wherein: the length of the antenna radiation unit (1) is a quarter wavelength at the resonant frequency of the medium.

5. The FPC Bluetooth antenna of claim 1, wherein: the width of the antenna radiation unit (1) is less than or equal to the width of the FPC substrate (2).

6. The FPC Bluetooth antenna of claim 1, wherein: the whole thickness of FPC bluetooth antenna is controlled to be 0.05 ~ 0.5 mm.

7. The FPC Bluetooth antenna of claim 1, wherein: the cross section of the FPC substrate (2) is polygonal.

8. The FPC Bluetooth antenna of claim 7, wherein: the cross section of the FPC substrate (2) is one of annular, circular and square.

9. The FPC Bluetooth antenna of claim 1, wherein: the FPC substrate (2) also comprises a first positioning notch (21) and/or a second positioning notch (22).