CN205282637U

CN205282637U - Broadband ground radiating antenna

Info

Publication number: CN205282637U
Application number: CN201520974457.2U
Authority: CN
Inventors: 胡沥; 徐利军
Original assignee: Shanghai Amphenol Airwave Communication Electronics Co Ltd
Current assignee: Shanghai Amphenol Airwave Communication Electronics Co Ltd
Priority date: 2015-12-01
Filing date: 2015-12-01
Publication date: 2016-06-01
Anticipated expiration: 2025-12-01

Abstract

The utility model discloses a broadband ground radiating antenna, this antenna includes: a ground wire disposes on a printed circuit board, a circuit part includes: metal conduction band and electric capacity, metal conduction band and electric capacity form a resonance circuit, and electric current on resonance circuit's the resonance current drive printed circuit board is in order to form the radiation, a feed part, ground wire, other end connecting circuit are connected to one end to a feed -in radiofrequency signal, a magnetic material, it is attached on printed circuit board to the distribution range of the resonance current of expander circuit part. The utility model discloses a broadband ground radiating antenna, its bandwidth is widened to the technique that adopts loading magnetic material to widen the antenna bandwidth, has overcome the narrower shortcoming of current antenna frequency band.

Description

Ground, a kind of broadband radiating antenna

Technical field

The utility model relates to radiating antenna field, ground, in particular to ground, a kind of broadband radiating antenna.

Background technology

The design of antenna is had higher requirement by the development of mobile Internet, it is desired to antenna has the performances such as multiband, small volume, high-level efficiency. Current conventional antenna form such as inverted F shaped antenna, inverted-L antenna, monopole antenna, radio loop etc. all volume or area to antenna have certain requirement, adopt traditional sky line technology, the volume of whole terminating unit can be increased undoubtedly.

Application number is: 201080054466.X, name is called: propose a kind of ground radiator technology using electric capacity in the Chinese patent of " using the antenna of ground radiator ", this technology is at floor empty regions loading capacitance, form the ground radiating antenna of corresponding band, have that volume is little, cost is low, the advantage such as convenient and pcb board one processing, but, by the restriction of headroom area, its bandwidth is narrow, limits its application.

Practical novel content

The utility model is for above-mentioned problems of the prior art, ground, a kind of broadband radiating antenna is proposed, adopt and load the technology that bandwidth of an antenna widened by magneticsubstance, widen its bandwidth by changing distribution of current around circuit part, overcome the shortcoming that existing antenna frequency band is narrower.

For solving the problems of the technologies described above, the utility model is achieved by the following technical solution:

The utility model provides ground, a kind of broadband radiating antenna, comprising: a ground wire, is configured on a printed circuit board (PCB);

One circuit part, comprising: metal conduction band and electric capacity, and described metal conduction band and described electric capacity form a tank circuit, and the resonance current of described tank circuit drives the electric current on described printed circuit board (PCB), to form radiation;

One feed part, one end connects described ground wire, and the other end connects described circuit part, with feed-in one radiofrequency signal;

One magneticsubstance, is attached on described printed circuit board (PCB), to expand the distribution range of the resonance current of described circuit part.

Goodly, described printed circuit board (PCB) being provided with clearance zone, described circuit part is arranged in described clearance zone.

Goodly, described clearance zone is positioned at the side of described printed circuit board (PCB).

Goodly, described magneticsubstance is positioned at the surface of described circuit part.

Goodly, described magneticsubstance is positioned at the periphery of described circuit part, and the distance between the edge of described magneticsubstance and the edge of described feed element is less than 3mm.

Goodly, described ground radiating antenna is single-frequency ground radiating antenna or two frequency ground radiating antenna, and the setting of magneticsubstance both can improve the bandwidth of single-frequency ground radiating antenna, it is possible to improve the bandwidth of two radiating antenna frequently.

Goodly, described electric capacity is lumped capacity or distributed capacitor.

Compared to prior art, the utility model has the following advantages:

Ground, the broadband radiating antenna that the utility model provides, adopts and loads the technology that bandwidth of an antenna widened by magneticsubstance, widens its bandwidth by changing distribution of current around circuit part, overcomes the shortcoming that existing antenna frequency band is narrower.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, enforcement mode of the present utility model is described further:

Fig. 1 is the structural representation of the circuit part of the ground radiating antenna of embodiment 1 of the present utility model;

Fig. 2 is the equivalent-circuit diagram of the ground radiating antenna of embodiment 1 of the present utility model;

Fig. 3 be the magneticsubstance of the ground radiating antenna of embodiment 1 of the present utility model site plan is set;

Fig. 4 is the current distributing figure of the ground radiating antenna before loading magneticsubstance;

Fig. 5 is the current distributing figure of the ground radiating antenna after loading magneticsubstance;

Fig. 6 loads the return loss comparison diagram before and after magneticsubstance;

Fig. 7 is the structure iron of the magneticsubstance of the ground radiating antenna of an embodiment of the present utility model;

Fig. 8 be the magneticsubstance of the ground radiating antenna of embodiment 2 of the present utility model site plan is set;

Fig. 9 is the structural representation of the circuit part of the ground radiating antenna of embodiment 3 of the present utility model.

Label illustrates: 1-printed circuit board (PCB), 4-feed part, 5-magneticsubstance;

21-first metal conduction band, 22-the 2nd metal conduction band, 23-the 3rd metal conduction band, 24-the 4th metal conduction band, 25-five metals belongs to conduction band, 26-the 6th metal conduction band, 27-the 7th metal conduction band;

31-first electric capacity, 32-the 2nd electric capacity, 33-the 3rd electric capacity, 34-the 4th electric capacity, 35-the 5th electric capacity.

Embodiment

Embodiment of the present utility model is done explanation in detail below; the present embodiment is implemented under premised on technical solutions of the utility model; give detailed enforcement mode and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.

Embodiment 1:

Composition graphs 1-Fig. 3, ground, broadband of the present utility model radiating antenna is described in detail by the present embodiment, and ground radiating antenna is a kind of antenna type utilizing magnetic field coupling to excite flooring radiation. the present embodiment is described in greater detail for single-frequency radiating antenna, it is illustrated in figure 1 its circuit part's separation structure schematic diagram, this ground radiating antenna is the clearance zone cutting a certain size at the side of printed circuit board (PCB) 1, metal conduction band and electric capacity form circuit part in clearance zone, the distributed capacitor of metal conduction band and electric capacity forms a high Q resonance circuit, in resonant frequency, its resonance current can drive the electric current on printed circuit board (PCB), thus forms radiation. the circuit part of the present embodiment divides and comprises: the first metal conduction band 21, first electric capacity 31, the 2nd metal conduction band 22 and the 2nd electric capacity 32, wherein: the first metal conduction band 21, first electric capacity 31 forms resonance loop with printed circuit board (PCB) 1, can change resonant frequency by the value of the length and the first electric capacity 31 that regulate the first metal conduction band 21, 2nd metal conduction band 22, the 2nd electric capacity 32 and current feed department 4 and printed circuit board (PCB) 1 are formed and mates loop, by the value of the length and the 2nd electric capacity 32 that change the 2nd metal conduction band 22, it is possible to adjustment notch depth. its equivalent-circuit diagram is as shown in Figure 2, it is made up of a resonance loop and two coupling mechanisms, wherein: C1 characterizes the 2nd electric capacity 32, L1 characterizes the 2nd metal conduction band 22, L2 characterizes the first metal conduction band 21, mutual inductance effect is there is between first metal conduction band 21 and the 2nd metal conduction band 22, C2 characterizes the first electric capacity 31, around the distributed inductance of clearance zone in L3 phenogram 1, its current trend is as shown in the circular arc dotted line in Fig. 1, other one end is flowed to from one end of clearance zone, L4 characterizes and distributed inductance corresponding with radiation pattern on printed circuit board (PCB), its current trend is as shown in the straight dotted line in Fig. 1, coupling is there is between two kinds of electric current formed magnetic fields. R1 characterizes the radiation resistance of printed circuit board (PCB), and C3 characterizes head and the tail two ends distributed capacity in space under the radiation pattern of printed circuit board (PCB).

In order to improve the input resistance bandwidth in excitation source " seeing ", the impedance Q value in excitation source " seeing " must be reduced, obviously, reducing the Q the most effective mode of value is exactly the percentage coupling improved between L3 and L4, generally, design of transformer can utilize the magnetic core of high magnetic permeability to improve the percentage coupling of mutual coupling coil, with reason, we can utilize the percentage coupling loading high frequency material to improve between L3 and L4, thus expand impedance bandwidth, as shown in Figure 3, magneticsubstance 5 is attached to the top of clearance zone 11, found by emulation, magneticsubstance 5 changes the distribution of current on printed circuit board (PCB) 1, it is illustrated in figure 4 the distribution of current of the ground radiating antenna before loading magneticsubstance 4, it is illustrated in figure 5 the distribution of current of the ground radiating antenna after loading magneticsubstance 5, contrast can be found out, after loading magneticsubstance 5, the distribution of current scope of circuit part 3 is expanded further, thus enhance the degree of coupling of the radiation electric current on itself and printed circuit board (PCB) 1, it is illustrated in figure 6 the return loss comparison diagram loaded before and after magneticsubstance, before dotted line represents loading magneticsubstance, after solid line represents loading magneticsubstance, as seen from the figure, before loading magneticsubstance, impedance bandwidth is 27MHz, after loading magneticsubstance, bandwidth is 45MHz, bandwidth has widened 64%, as can be seen here, magneticsubstance improves impedance bandwidth.

In different embodiment, the size and dimension of magneticsubstance is without particular requirement, and it can also be other shapes such as circular, oval, it is also possible to reaches same effect. Being illustrated in figure 4 magneticsubstance is facilities when circle.

Embodiment 2:

The present embodiment as different from Example 1 magneticsubstance 5 be arranged on the inboard of clearance zone, namely the periphery of circuit part it is arranged on, as shown in Figure 8, the effect of the distribution of current scope strengthening circuit part so also can be reached, and then the degree of coupling of the radiation electric current strengthened on itself and printed circuit board (PCB) 1. In the present embodiment, the edge of magneticsubstance 5 and the side edge of clearance zone, in different embodiment, both edges leave the distribution of current scope that certain distance can also strengthen circuit part, and the distance that both edges leave is preferably not more than 3mm.

Embodiment 3:

The structure of the present embodiment circuit part as different from Example 1 is different, is illustrated in figure 9 the structural representation of the circuit part of the present embodiment, and the ground radiating antenna of the present embodiment be two radiating antennas frequently. circuit part divides and comprises: five metal conduction bands and three electric capacity, it is respectively: the 3rd metal conduction band 23, 4th metal conduction band 24, five metals belongs to conduction band 25, 6th metal conduction band 26, 7th metal conduction band 27, 3rd electric capacity 33, 4th electric capacity 34 and the 5th electric capacity 35, wherein the 3rd metal conduction band 23, five metals belongs to conduction band 25, 7th metal conduction band 27, 3rd electric capacity 33 and printed circuit board (PCB) 1 form the first resonance loop, 3rd electric capacity 33 and the 3rd metal conduction band 23, five metals belongs to conduction band 25, 7th metal conduction band 27 can tuning frequency, make its resonance in the first resonance band. 3rd metal conduction band 23, the 6th metal conduction band 26, the 7th metal conduction band 27, the 4th electric capacity 34 and printed circuit board (PCB) 1 form the 2nd resonance loop, 4th electric capacity 34 and the 3rd metal conduction band 23, the 6th metal conduction band 26, the 7th metal conduction band 27 can tuning frequency so that it is resonance is in the 2nd resonance band. 3rd metal conduction band 23, the 4th metal conduction band 24, the 5th electric capacity 35 form coupling loop, the 5th electric capacity 35 and the 3rd metal conduction band 23, the 4th metal conduction band 24, it is possible to regulate the first resonance band and the notch depth of the 2nd resonance band.

Ground of the present utility model radiating antenna can be widely applied on notebook, mobile phone and wearable device.

In better embodiment, magneticsubstance is positioned at the surface of circuit part.

In different enforcement, magneticsubstance also can be positioned at around circuit part, so also can reach the effect of the distribution range of the resonance current strengthening circuit part.

Disclosed herein is only preferred embodiment of the present utility model, and this specification sheets is chosen and specifically described these embodiments, is to explain principle of the present utility model and practical application better, is not to restriction of the present utility model. The modifications and variations that any those skilled in the art do within the scope of specification sheets, all should drop in the scope that the utility model is protected.

Claims

1. ground, broadband radiating antenna, it is characterised in that, comprising:

One ground wire, is configured on a printed circuit board (PCB);

2. radiating antenna according to claim 1ly, it is characterised in that, described printed circuit board (PCB) is provided with clearance zone, described circuit part is arranged in described clearance zone.

3. radiating antenna according to claim 2ly, it is characterised in that, described clearance zone is positioned at the side of described printed circuit board (PCB).

4. radiating antenna according to claim 1ly, it is characterised in that, described magneticsubstance is positioned at the surface of described circuit part.

5. radiating antenna according to claim 1ly, it is characterised in that, described magneticsubstance is positioned at the periphery of described circuit part, and the distance between the edge of described magneticsubstance and the edge of described feed element is not more than 3mm.

6. radiating antenna according to claim 1ly, it is characterised in that, described ground radiating antenna is single-frequency ground radiating antenna or two frequency ground radiating antenna.

7. radiating antenna according to claim 1ly, it is characterised in that, described electric capacity is lumped capacity or distributed capacitor.