CN202013945U

CN202013945U - Miniature multi-frequency PCB antenna structure

Info

Publication number: CN202013945U
Application number: CN201120066826XU
Authority: CN
Inventors: 郑东育; 游宏明; 陈一锋; 彭嘉美
Original assignee: WIESON TECHNOLOGIES (DONGGUAN) Co Ltd
Current assignee: WIESON TECHNOLOGIES (DONGGUAN) Co Ltd
Priority date: 2011-03-15
Filing date: 2011-03-15
Publication date: 2011-10-19
Anticipated expiration: 2021-03-15

Abstract

A miniature multi-frequency PCB (Printed Circuit Board) antenna structure comprises a PCB antenna, a piece of grounding metal and a grounding extending path, wherein a first radiation arm, a second radiation arm and a grounding part are arranged on the surface of a PCB; a feed-in terminal is formed at the tail end of the first radiation arm provided with a first coupling part, the second radiation arm extends to connect with the grounding part and is provided with a second coupling part, and the first coupling part and the second coupling part are separated, so that a signal passing through the first coupling part can be coupled with the second coupling part; one side of the grounding metal is connected with the grounding part; and the grounding extending path is arranged on the back side of the PCB, is provided with a grounding section in conduction connection with the grounding part on the surface of the PCB, and extends to form a first path and a second path, the first path extends along the first radiation arm, the second path extends along the second radiation arm, and the first radiation arm and the second radiation arm take capacity effects with the grounding extending path, so as to increase the wavelength and reduce the dimension of the PCB antenna.

Description

Small multi-frequency PCB antenna structure

Technical field

The utility model refers to especially that about a kind of small multi-frequency PCB antenna structure a kind of utilization is provided with the antenna structure of a ground connection extension path with minification at the printed circuit board (PCB) back side.

Background technology

The wireless communication technique development makes running gear (Mobile device) widely be used in a large number.In having the product of wireless communication function, necessary means has antenna structure just can reach the reception and the radiation of signal.

Because the function of running gear increases and must be convenient for carrying, and the requirement of consolidationization is arranged, the antenna structure of internal configurations also can be required minification as much as possible thus.Simultaneously, antenna also has the function of the multifrequency of being required.In this case, how to compress antenna structure and possess the multifrequency function, always the problem of inquiring into for industry.

In the present technology, a kind of formed wide band antenna structure of imperfect ground connection effect that utilizes is arranged, it has the size and the multifrequency function of dwindling, and often is used.This type of utilizes the formed wide band antenna structure of imperfect ground connection effect, the main radiation arm of a high frequency and the radiation arm of a low frequency of on a printed circuit board (PCB), being furnished with, and the coupling part that this two radiation arm has separately is coupled it, and can produce the multifrequency function.

Yet, though this kind utilizes the formed wide band antenna structure prior art of imperfect ground connection effect can reach the multifrequency function, but fail effectively to increase the required wavelength of antenna, for example, at Global System for Mobile Communication (Global System for Mobile Communications, GSM) in the application, the length of required printed circuit board (PCB) is about 55～60mm, so its antenna size still has the requirement of dwindling.

Summary of the invention

The purpose of this utility model is, a kind of small multi-frequency PCB antenna structure is provided, and it is simple in structure, and is easy to use, effectively minification, ease of assembly and use.

For achieving the above object, the utility model discloses a kind of small multi-frequency PCB antenna structure, it is characterized in that comprising:

One PCB antenna is furnished with at least one first radiation arm, one second radiation arm and a grounding parts in a printed circuit board surface; This first radiation arm forms a feed side endways and has one first coupling part at least, and this second radiation arm extend connect this grounding parts and have at least one with this first coupling part separately and make signal by this first coupling part can be coupled to second coupling part on it;

One grounded metal, the one side is connected with this grounding parts; And

One ground connection extension path, be arranged in the back side of this printed circuit board (PCB), have a ground connection section that is connected with the grounding parts conducting of this printed circuit board surface, and this ground connection section is extended this first radiation arm and this second radiation arm and this ground connection extension path generation capacity effect increase wavelength one first path and one second path with minification of sening as an envoy to certainly; Extend along this first radiation arm in this first path, and extend along this second radiation arm in this second path.

Wherein, the ground connection section of this ground connection extension path and printed circuit board (PCB) between this grounding parts are embedded with many and imbed and run through this printed circuit board surface and the back side so that the conducting body that this ground connection section is connected with this grounding parts conducting.

Wherein, the length of this printed circuit board (PCB) is 40～50mm.

Wherein, the width in this first path and this second path is littler than this first radiation arm and this second radiation arm.

By said structure, small multi-frequency PCB antenna structure provided by the utility model cooperates the desired size of trend of miniature antenna more and more littler, reaches the size of antenna is effectively dwindled and to put in the miniaturization product.The utility model allows the prior art antenna frame just be enough to reach actual required wavelength in the space of required size originally compared to prior art, is able to minification and can reaches required wavelength.For example in the application of Global System for Mobile Communication (GSM), the length designed with the utility model can be contracted to 40～50mm, and this will make small multi-frequency PCB antenna structure ease of assembly provided by the utility model in the running gear of consolidation requirement.

Below, design feature of the present utility model will be described in detail according to the embodiment shown in the drawing and use effect.

Description of drawings

Fig. 1 represents exploded view of the present utility model,

Fig. 2 represents of the present utility model group of upright figure,

Fig. 3 represents the upright figure of the group of another angle of the utility model,

Fig. 4 represents plan view of the present utility model,

Fig. 5 represents the measured voltage standing wave ratio figure of the utility model.

Embodiment

See also Fig. 1 to Fig. 3, the utility model provides a kind of small multi-frequency PCB antenna structure 100, mainly is made of a PCB antenna 1, a grounded metal 2 and a ground connection extension path 3.

PCB antenna 1 of the present utility model, in a printed circuit board (PCB) 10 surface arrangement one first radiation arm 11, one second radiation arm 12 and a grounding parts 13 are arranged, and being embedded with many conducting bodies 14 in the relative position of grounding parts 13, the surface 101 and the back side 102 of printed circuit board (PCB) 10 is imbedded and run through to those conducting bodies 14.

The person of advancing, first radiation arm 11 forms a feed side 111 endways and has one first coupling part 110 at least, and second radiation arm 12 extends connection grounding parts 13 and has one second coupling part 120.First coupling part 110 and second coupling part 120 separately can be referring to shown in Figure 2, and feasible signal by this first coupling part 110 can be coupled to second coupling part 120.

Grounded metal 2 one sides 21 of the present utility model are connected with grounding parts 13.Ground connection extension path 3 is arranged in the back side 102 of printed circuit board (PCB) 10, having a ground connection section 30 is connected with grounding parts 13 conductings on printed circuit board (PCB) 10 surfaces 101, as shown in the figure, it makes ground connection section 30 be connected with grounding parts 13 conductings with a plurality of conducting bodies 14 of being buried underground in the printed circuit board (PCB) 10.

In addition, ground connection extension path 3 extends one first path 31 and one second path 32 from ground connection section 30.Can cooperate Fig. 3 and shown in Figure 4, extend along first radiation arm 11 in first path 31, and extend along second radiation arm 12 in second path 32, make first radiation arm 11 and second radiation arm 12 and ground connection extension path 3 produce capacity effect and increase wavelength, and reach the size of dwindling PCB antenna 1.

First path 31 and second path 32 that first radiation arm 11 of the present utility model and second radiation arm 12 are extended with respect to the back side 102 of printed circuit board (PCB) 10, walk at the rear of first radiation arm 11 and second radiation arm 12, and little than first radiation arm 11 and second radiation arm 12 of first path 31 that extends out and second path, 32 width.

See also shown in Figure 5ly, be the measured voltage standing wave ratio figure of the utility model, show that the utility model is a good multifrequency antenna.

The utility model cooperates the desired size of trend of miniature antenna more and more littler, reaches the size of antenna is effectively dwindled and to put in the miniaturization product.The utility model allows the prior art antenna frame just be enough to reach actual required wavelength in the space of required size originally compared to prior art, is able to minification and can reaches required wavelength.For example at Global System for Mobile Communication (Global System for Mobile Communications, GSM) in the application, the length of the required printed circuit board (PCB) of the general using formed wide band antenna structure of imperfect ground connection effect is about 55～60mm, and can be contracted to 40～50mm with the designed length of the utility model, this will make small multi-frequency PCB antenna structure ease of assembly provided by the utility model in the running gear of consolidation requirement.

To sum up institute is old, and small multi-frequency PCB antenna structure provided by the utility model meets novelty of patent and progressive important document fully, files an application in the whence in accordance with the law.

Claims

1. small multi-frequency PCB antenna structure is characterized in that comprising:

One grounded metal, the one side is connected with this grounding parts; And

2. according to the described small multi-frequency PCB antenna of claim 1 structure, it is characterized in that the ground connection section of this ground connection extension path and printed circuit board (PCB) between this grounding parts are embedded with many and imbed and run through this printed circuit board surface and the back side so that the conducting body that this ground connection section is connected with this grounding parts conducting.

3. according to the described small multi-frequency PCB antenna of claim 1 structure, it is characterized in that the length of this printed circuit board (PCB) is 40～50mm.

4. according to the described small multi-frequency PCB antenna of claim 1 structure, it is characterized in that the width in this first path and this second path is littler than this first radiation arm and this second radiation arm.