CN103956560A

CN103956560A - Novel ultra wide band folding monopole antenna with omni-directional radiation function

Info

Publication number: CN103956560A
Application number: CN201410165170.5A
Authority: CN
Inventors: 张鹏宇; 邱景辉; 石宪庆; 祁嘉然; 王楠楠
Original assignee: CHANGZHOU JIHE RADIO FREQUENCY ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: CHANGZHOU JIHE RADIO FREQUENCY ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2014-04-16
Filing date: 2014-04-16
Publication date: 2014-07-30

Abstract

The invention relates to an ultra wide band antenna, in particular to a novel ultra wide band folding monopole antenna with an omni-directional radiation function. The novel ultra wide band folding monopole antenna with the omni-directional radiation function achieves the omni-directional variation characteristic of a directional diagram at the high-frequency end of a planar monopole antenna. A traditional planar monopole is bent to form an S-shaped monopole; a high-frequency-band radiation directional diagram of the antenna is improved, the lateral dimension of a vibrator is lowered, and the size of a floor is reduced at the same time.

Description

A kind of novel ultra broadband folded monopole sub antenna with omnidirectional radiation

Technical field

The present invention relates to a kind of ultra-wideband antenna, be specifically related to a kind of novel ultra broadband folded monopole sub antenna with omnidirectional radiation.

Background technology

Along with the development of ultra-wideband communication system, the advantage that its data transmission rate is high, loss is low more and more receives researcher's concern.From FCC's meeting (US-FCC) approval in 2002, using the frequency range of 3.1-10.6GHz as Ultra-wideband Communication Technology, since application, Chinese scholars was carried out a large amount of research to this.As one of ultra-wideband communication system important front end part, the design of ultra-wideband antenna also becomes the focus of people's research in recent years.In various types of antennas, plane single pole sub antenna is little with its volume, be easy to integrated feature shows good broadband character.But plane single pole sub antenna is in order to obtain wider impedance bandwidth, and oscillator has larger width conventionally, along with the rising of operating frequency, due to the difference of field path-length, the omni-directional of the antenna pattern of antenna can variation.

Summary of the invention

The object of the invention is to: for overcoming the above problems, provide a kind of high band radiation pattern of not only improving antenna, and reduced the lateral dimension of oscillator, also reduced the novel ultra broadband folded monopole sub antenna with omnidirectional radiation of ground board size simultaneously.

Technical scheme of the present invention is such:

A kind of novel ultra broadband folded monopole sub antenna with omnidirectional radiation, by S type monopole and metal floor, formed, by coaxial line, connect between the two, the inner core of described coaxial line connects the semi arch structure on S type monopole, coaxial line crust connection metal floor; Described S type monopole is that by planar monopole, to fold out 3 width be that the sheet metal that L1 and 2 width are L2 forms; The semi arch structure that framework after described S type monopole cut-off is R2 by radius, the quadrant arc structure that the quadrant arc structure that radius is R3 and radius are R4 forms jointly; Described metal floor is that radius is the plectane of R1.

Further, the data parameters of this antenna is respectively that R1 is 12.5mm, and R2 is 3.5mm, and R3 is 7.5mm, and R4 is 3.5mm, and L1 is 7mm, and L2 is 3.5mm.

Further, the vertical height of described S type monopole is 25mm, and described S type monopole and metal floor spacing are 1mm.

Further, described S type monopole is folded into inverted S-shaped shape, and corner is 90 degree.

Compared with prior art, its beneficial effect is in the present invention:

1, this invention volume little, be easy to integrated feature and show good broadband character.

2, this invention is carried out bending to conventional planar monopole, form a kind of oscillator of S type, not only improved the high band radiation pattern of antenna, and reduced the lateral dimension of oscillator, also reduced ground board size, make this antenna size dwindle 70%～75% simultaneously.

Accompanying drawing explanation

Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:

Fig. 1 is front view of the present invention;

Fig. 2 is vertical view of the present invention;

Fig. 3 is monopole expanded view of the present invention;

Fig. 4: antenna is at standing-wave ratio (VSWR) figure of 3.1GHz～10.6GHz;

Fig. 5: antenna is at the change in gain curve of 3.1GHz～10.6GHz;

Fig. 6: antenna is directional diagram in x-y plane;

Fig. 7: antenna is directional diagram in x-z plane;

Fig. 8: antenna is directional diagram in y-z plane;

Fig. 9: antenna groups time delay simulation/measured curve contrast.

Mark in figure: 1, S type monopole; 11, the semi arch structure that radius is R2; 12, the quadrant arc structure that radius is R3; 13, the quadrant arc structure that radius is R4; 2, metal floor; 3, coaxial line.

Embodiment

Disclosed all features in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.

Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing), unless narration especially all can be replaced by other equivalences or the alternative features with similar object.Unless narration especially, each feature is an example in a series of equivalences or similar characteristics.

As shown in Figures 1 to 3, a kind of novel ultra broadband folded monopole sub antenna with omnidirectional radiation, by S type monopole 1 and metal floor 2, formed, by coaxial line 3, connect between the two, the inner core of described coaxial line 3 connects the semi arch structure 11 on S type monopole, coaxial line crust connection metal floor 2; Described S type monopole 1 is that by planar monopole, to fold out 3 width be that the sheet metal that L1 and 2 width are L2 forms; The semi arch structure 11 that framework after described S type monopole 1 cut-off is R2 by radius, the quadrant arc structure 13 that the quadrant arc structure 12 that radius is R3 and radius are R4 forms jointly; The plectane that described metal floor 2 is R1 for radius.

The data parameters of this antenna is respectively that R1 is 12.5mm, and R2 is 3.5mm, and R3 is 7.5mm, and R4 is 3.5mm, and L1 is 7mm, and L2 is 3.5mm; The vertical height of described S type monopole 1 is 25mm, and described S type monopole 1 and metal floor 2 spacings are 1mm; Described S type monopole 1 is folded into inverted S-shaped shape, and corner is 90 degree.

As shown in Fig. 4～9, through links such as simulation optimization tests, the antenna performance result obtaining is as follows: be of a size of 25*25*26 (mm ³), within the scope of 3.1GHz～10.6GHz, standing-wave ratio VSWR≤2, omnidirectional radiation characteristic is waited until further raising, has good time domain specification simultaneously.

The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination disclosing in this manual, and the arbitrary new method disclosing or step or any new combination of process.

Claims

1. a novel ultra broadband folded monopole sub antenna with omnidirectional radiation, it is characterized in that: by S type monopole (1) and metal floor (2), formed, by coaxial line (3), connect between the two, the inner core of described coaxial line (3) connects the semi arch structure (11) on S type monopole (1), coaxial line crust connection metal floor (2); Described S type monopole (1) is that by planar monopole, to fold out 3 width be that the sheet metal that L1 and 2 width are L2 forms; The semi arch structure (11) that framework after described S type monopole (1) cut-off is R2 by radius, the quadrant arc structure (13) that the quadrant arc structure (12) that radius is R3 and radius are R4 forms jointly; Described metal floor (2) for radius be the plectane of R1.

2. a kind of novel ultra broadband folded monopole sub antenna with omnidirectional radiation according to claim 1, is characterized in that: the data parameters of this antenna is respectively that R1 is 12.5mm, and R2 is 3.5mm, and R3 is 7.5mm, and R4 is 3.5mm, and L1 is 7mm, and L2 is 3.5mm.

3. a kind of novel ultra broadband folded monopole sub antenna with omnidirectional radiation according to claim 1, it is characterized in that: the vertical height of described S type monopole (1) is 25mm, described S type monopole (1) and metal floor (2) spacing are 1mm.

4. a kind of novel ultra broadband folded monopole sub antenna with omnidirectional radiation according to claim 1, is characterized in that: S type monopole (1) is folded into inverted S-shaped shape, and corner is 90 degree.