CN104538727A - Dual-frequency-band spiral antenna and method for achieving dual-frequency-band work - Google Patents
Dual-frequency-band spiral antenna and method for achieving dual-frequency-band work Download PDFInfo
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- CN104538727A CN104538727A CN201410795051.8A CN201410795051A CN104538727A CN 104538727 A CN104538727 A CN 104538727A CN 201410795051 A CN201410795051 A CN 201410795051A CN 104538727 A CN104538727 A CN 104538727A
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Abstract
The invention discloses a dual-frequency-band spiral antenna and a method for achieving dual-frequency-band work. The dual-frequency-band spiral antenna comprises a spiral upper base, a first spiral coil for deciding the first resonant frequency of the antenna, a second spiral coil for deciding the second resonant frequency of the antenna and a spiral lower base. The diameter of the second spiral coil is larger than that of the first spiral coil. The length of the second spiral coil is smaller than that of the first spiral coil. The bottom end of the first spiral coil is connected with the spiral lower base. The bottom end of the second spiral coil is sleeved with the first spiral coil. The top end of the second spiral coil is connected with the spiral upper base which abuts against the top end of the first spiral coil. By means of the dual-frequency-band spiral antenna, one end of the first spiral coil is sleeved with the second spiral coil, the actual length of the antenna can be greatly decreased to meet the actual size requirement on the basis of ensuring the effective acceptable length, and therefore the dual-frequency-band spiral antenna can be applied to a low frequency band or a frequency close to the working frequency.
Description
Technical field
The present invention relates to field of antenna, particularly relate to and a kind ofly work in the two-band helical antenna of lower frequency section or close two frequency ranges of working frequency range and a kind of method realizing dual band operation.
Background technology
Car antenna application, helical antenna is quite common as signal receiving device, because helical antenna is shorter relative to monopole antenna size.But traditional helical antenna is used for one-segment, even if there is two-band, two band operation frequency ranges of its work are higher or two frequency range intervals are wider, the 800MHz frequency range of such as GSM and 1900MHz frequency range, or one is FM frequency range, China 87.5 ~ 108MHz, one is GSM800MHz.Two frequency ranges that working frequency range is comparatively close working frequency range is lower while, such as FM frequency range, works for the multiple FM frequency range in the whole world simultaneously, uses Spiral antenna designs to remain a difficult problem.
Because in said frequencies section, electromagnetic frequency is low, wavelength is longer, and this just requires that the antenna length received will be grown, and two working frequency range are comparatively close simultaneously, resonant frequency point can interfere with each other impact, and antenna of the prior art cannot be applied in two or more frequency bands above-mentioned.
Summary of the invention
For not enough in above-mentioned technology, the invention provides a kind of two-band helical antenna and realize the method for dual band operation, two frequency ranges that lower frequency, working frequency range are close can be applied to.
For achieving the above object, the invention provides a kind of two-band helical antenna, the spiral seat of honour and seat under determining first helical coil of first resonance frequency of antenna, the second helical coil of second resonance frequency of decision antenna and spiral; The diameter of described second helical coil is greater than the diameter of the first helical coil, and the length of the second helical coil is less than the length of the first helical coil; The bottom of described first helical coil is connected with seat under spiral, and the bottom of described second helical coil is enclosed within the outside of the first helical coil, and the top of described second helical coil is connected with the spiral seat of honour, and the described spiral seat of honour props up the top of the first helical coil.
Wherein, this two-band helical antenna also comprises for keeping seat relative position under the first helical coil, the second helical coil, the spiral seat of honour and spiral and playing the plastic, rubber-coating of insulating effect, and described plastic, rubber-coating is fixed on the skin of seat under the first helical coil, the second helical coil, the spiral seat of honour and spiral.
Wherein, described first helical coil and the second helical coil are metal material, and described first helical coil and the second helical coil keep mutually insulation.
Wherein, under described spiral, seat is metal material, and under spiral, seat connects external signal input and helical coil as the feedback point of antenna.
Wherein, the diameter D of described first helical coil is 3mm, wire diameter d is 0.2mm, and interval S is 0.95mm, length L is 135mm; The diameter D of described second helical coil is 5mm, wire diameter d is 0.8mm, and interval S is 1.3mm, length L is 75mm; The coupling length L3 of described first helical coil and the second helical coil is 70mm.
The present invention also provides a kind of method realizing dual band operation, comprises the following steps:
Step one, select two helical coils, wherein the diameter of the second helical coil is greater than the diameter of the first helical coil, and the length of the second helical coil is less than the length of the first helical coil;
Step 2, is enclosed within the top of the first helical coil by the second helical coil bottom, described second helical coil bottom is loose free end;
Step 3, seat under the bottom of the first helical coil connects spiral, connects the spiral seat of honour on the top of the second helical coil;
Step 4, by selecting the first helical coil and second helical coil of different size, to adjust the interval S of the coil of two helical coils, coil diameter D, loop length L and coiling conductor diameter d, and the nested coupling length L3 of two helical coils, the working frequency range making it reach to want and standing-wave ratio.
Wherein, under the first helical coil, the second helical coil, spiral, the outer wrap at seat and the spiral seat of honour plays the plastic, rubber-coating of fixation and insulating effect.
Wherein, described first helical coil and the second helical coil are metal material, and described first helical coil and the second helical coil keep mutually insulation.
Wherein, the bottom of described first helical coil is fixedly connected with seat under spiral, and the top of the first helical coil bottom is propped up by the spiral seat of honour, under spiral seat and the spiral seat of honour fixation under, first helical coil keep coaxial with the second helical coil.
Wherein, the diameter D of described first helical coil is 3mm, wire diameter d is 0.2mm, and interval S is 0.95mm, length L is 135mm; The diameter D of described second helical coil is 5mm, wire diameter d is 0.8mm, and interval S is 1.3mm, length L is 75mm; The coupling length L3 of described first helical coil and the second helical coil is 70mm.
The invention has the beneficial effects as follows: compared to prior art, two-band helical antenna provided by the invention, be provided with two coil diameters and the different helical coil of loop length, wherein, first helical coil determines first resonance frequency of antenna, second helical coil determines second resonance frequency, and the second helical coil has impact to first resonance frequency; Second helical coil is enclosed within one end of the first helical coil, can ensure effectively to receive on the basis of length, significantly reduce the physical length of antenna with the size requirements of satisfied reality, produce two or more resonance frequency close to each other simultaneously, therefore can be applied to compared with low-frequency range or close two frequency ranges of working frequency range.By adjusting the coil-span S of two helical coils, coil diameter D, loop length L and coiling conductor diameter d, and the coupling length L3 that two helical coils are nested, working frequency range antenna being reached want and standing-wave ratio.In addition, two-band helical antenna provided by the invention, compact conformation, length is little, and institute takes up space little, is applicable to being applied to car antenna field.
Accompanying drawing explanation
Fig. 1 is the structure chart of two-band helical antenna provided by the invention;
Fig. 2 is the flow chart realizing the method for dual band operation provided by the invention;
Fig. 3 provided by the inventionly realizes dual band operation test result schematic diagram.
Main element symbol description is as follows:
11, the spiral seat of honour 12, first helical coil
13, seat under the second helical coil 14, spiral.
Embodiment
In order to more clearly state the present invention, below in conjunction with accompanying drawing, the present invention is further described.
Refer to Fig. 1, two-band helical antenna provided by the invention, comprise the spiral seat of honour 11, determine the first helical coil 12 of first resonance frequency of antenna, the second helical coil 13 of second resonance frequency determining antenna and spiral under seat 14; The diameter of the second helical coil 13 is greater than the diameter of the first helical coil 12, and the length of the second helical coil 13 is less than the length of the first helical coil 12; The bottom of the first helical coil 12 is connected with seat under spiral 14, and the bottom of the second helical coil 13 is enclosed within the top of the first helical coil 12, and the top of the second helical coil 13 is connected with the spiral seat of honour 11, and the spiral seat of honour 11 props up the top of the first helical coil 12.
Compared to prior art, two-band helical antenna provided by the invention, is provided with two coil diameters and the different helical coil of loop length, wherein, first helical coil 12 determines first resonance frequency of antenna, and the second helical coil 13 determines second resonance frequency; Second helical coil 13 is enclosed within one end of the first helical coil 12, multiple resonance frequency can be produced, simultaneously on the basis meeting multiple resonance frequency, significantly reduce the physical length of antenna with the size requirements of satisfied reality, therefore can be applied to compared with low-frequency range or close two frequency ranges of working frequency range.And, by adjusting the interval S of the coil of two helical coils, coil diameter D, loop length L and coiling conductor diameter d, and the coupling length L3 that two helical coils are nested, working frequency range antenna being reached want and standing-wave ratio.In addition, two-band helical antenna provided by the invention, compact conformation, length is little, and institute takes up space little, is applicable to being applied to car antenna field.
In the present embodiment, this two-band helical antenna also comprises for keeping seat 14 relative position under the first helical coil 12, second helical coil 13, the spiral seat of honour 11 and spiral and playing the plastic, rubber-coating of insulating effect, and plastic, rubber-coating is fixed on the skin of seat 14 under the first helical coil 12, second helical coil 13, the spiral seat of honour 11 and spiral.
The effect of plastic, rubber-coating supports fixing whole helical antenna, the relative position between each assembly stablized, guarantees its stable performance, reliable operation; And plastic, rubber-coating also plays insulating effect, the reliability of Antenna Operation can be improved equally; In addition, plastic, rubber-coating also can the installation of convenient antenna.
In the present embodiment, the first helical coil 12 and the second helical coil 13 are metal material, and the first helical coil 12 and the second helical coil 13 keep mutually insulation.First helical coil 12 and the second helical coil 13 receive the electromagnetic wave of different frequency respectively, and two coils are connected with external circuit respectively, two coil mutually insulateds, have ensured to produce multiple working frequency range.
In the present embodiment, under spiral, seat 14 is metal material, and under spiral, seat 14 connects external signal input and helical coil as the feedback point of antenna.
In the present embodiment, the diameter D of the first helical coil 12 is 3mm, wire diameter d is 0.2mm, and interval S is 0.95mm, length L is 135mm; The diameter D of the second helical coil 13 is 5mm, wire diameter d is 0.8mm, and interval S is 1.3mm, length L is 75mm; The coupling length L3 of the first helical coil 12 and the second helical coil 13 is 70mm.
First helical coil 12 and the second helical coil 13 of above-mentioned size, is applicable to receiving the frequency range i.e. 64 ~ 75MHz of Eastern Europe FM and the frequency range i.e. 87.5 ~ 108MHz of Chinese FM.Certainly, this is only a specific embodiment of the present invention, and the size of the first helical coil 12 of the present invention and the second helical coil 13 not limit in this, also can select other sizes, as required with the different frequency range received.
Refer to Fig. 2, the present invention also provides a kind of method realizing dual band operation, comprises the following steps:
Step one, selects two helical coils, and wherein the diameter of the second helical coil 13 is greater than the diameter of the first helical coil 12, and the length of the second helical coil 13 is less than the length of the first helical coil 12;
Step 2, is enclosed within the top of the first helical coil 12 by the second helical coil 13 bottom, the second loose free end in end, helical coil 13 bottom;
Step 3, seat 14 under the bottom of the first helical coil 12 connects spiral, connects the spiral seat of honour 11 on the top of the second helical coil 13;
Step 4, by selecting the first helical coil 12 and the second helical coil 13 of different size, to adjust the interval S of the coil of two helical coils, coil diameter D, loop length L and coiling conductor diameter d, and the nested coupling length L3 of two helical coils, the working frequency range making it reach to want and standing-wave ratio.
Refer to Fig. 2, the method realizing dual band operation provided by the invention, determine first resonance frequency of antenna with the first helical coil 12, the second helical coil 13 determines second resonance frequency; Second helical coil 13 is enclosed within one end of the first helical coil 12, multiple resonance frequency can be produced, and the physical length significantly reducing antenna is with the size requirements of satisfied reality, therefore can be applied to compared with low-frequency range or close two frequency ranges of working frequency range.Two-band helical antenna provided by the invention, compact conformation, length is little, and institute takes up space little, is applicable to being applied to car antenna field.
And, by adjusting the interval S of the coil of two helical coils, coil diameter D, loop length L and coiling conductor diameter d, and the coupling length L3 that two helical coils are nested, working frequency range antenna being reached want and standing-wave ratio.
Such as, the frequency range of Eastern Europe FM is 64 ~ 75MHz, the frequency range of China FM is 87.5 ~ 108MHz, for making Antenna Operation in these two frequency ranges, by as follows for the size design of the first helical coil 12 and the second helical coil 13: the diameter D of the first helical coil 12 is 3mm, wire diameter d is 0.2mm, and interval S is 0.95mm, length L is 135mm; The diameter D of the second helical coil 13 is 5mm, wire diameter d is 0.8mm, and interval S is 1.3mm, length L is 75mm; The coupling length L3 of the first helical coil 12 and the second helical coil 13 is 70mm.Work test result, as shown in Figure 3.
In the present embodiment, the bottom of the first helical coil 12 is fixedly connected with seat under spiral 14, the top of the first helical coil 12 bottom is propped up by the spiral seat of honour 11, under spiral seat 14 and the spiral seat of honour 11 fixation under, first helical coil 12 keep coaxial with the second helical coil.First helical coil 12 and the second helical coil keep axis, two coils can not be contacted with each other, can ensure the insulation between two coils without the need to other insulation systems.
Be only several specific embodiment of the present invention above, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (10)
1. a two-band helical antenna, is characterized in that, comprise the spiral seat of honour, determine the first helical coil of first resonance frequency of antenna, the second helical coil of second resonance frequency determining antenna and spiral under seat; The diameter of described second helical coil is greater than the diameter of the first helical coil, and the length of the second helical coil is less than the length of the first helical coil; The bottom of described first helical coil is connected with seat under spiral, and the bottom of described second helical coil is enclosed within the outside of the first helical coil, and the top of described second helical coil is connected with the spiral seat of honour, and the described spiral seat of honour props up the top of the first helical coil.
2. two-band helical antenna according to claim 1, it is characterized in that, this two-band helical antenna also comprises for keeping seat relative position under the first helical coil, the second helical coil, the spiral seat of honour and spiral and playing the plastic, rubber-coating of insulating effect, and described plastic, rubber-coating is fixed on the skin of seat under the first helical coil, the second helical coil, the spiral seat of honour and spiral.
3. two-band helical antenna according to claim 1, is characterized in that, described first helical coil and the second helical coil are metal material, and described first helical coil and the second helical coil keep mutually insulation.
4. two-band helical antenna according to claim 1, is characterized in that, under described spiral, seat is metal material, and under spiral, seat connects external signal input and helical coil as the feedback point of antenna.
5. two-band helical antenna according to claim 1, is characterized in that, the diameter D of described first helical coil is 3mm, wire diameter d is 0.2mm, and interval S is 0.95mm, length L is 135mm; The diameter D of described second helical coil is 5mm, wire diameter d is 0.8mm, and interval S is 1.3mm, length L is 75mm; The coupling length L3 of described first helical coil and the second helical coil is 70mm.
6. realize a method for dual band operation, it is characterized in that, comprise the following steps:
Step one, select two helical coils, wherein the diameter of the second helical coil is greater than the diameter of the first helical coil, and the length of the second helical coil is less than the length of the first helical coil;
Step 2, is enclosed within the top of the first helical coil by the second helical coil bottom, described second helical coil bottom is loose free end;
Step 3, seat under the bottom of the first helical coil connects spiral, connects the spiral seat of honour on the top of the second helical coil;
Step 4, by selecting the first helical coil and second helical coil of different size, to adjust the interval S of the coil of two helical coils, coil diameter D, loop length L and coiling conductor diameter d, and the nested coupling length L3 of two helical coils, the working frequency range making it reach to want and standing-wave ratio.
7. the method realizing dual band operation according to claim 5, is characterized in that, under the first helical coil, the second helical coil, spiral, the outer wrap at seat and the spiral seat of honour plays the plastic, rubber-coating of fixation and insulating effect.
8. the method realizing dual band operation according to claim 5, is characterized in that, described first helical coil and the second helical coil are metal material, and described first helical coil and the second helical coil keep mutually insulation.
9. the method realizing dual band operation according to claim 5, it is characterized in that, the bottom of described first helical coil is fixedly connected with seat under spiral, the top of the first helical coil bottom is propped up by the spiral seat of honour, under spiral seat and the spiral seat of honour fixation under, first helical coil keep coaxial with the second helical coil.
10. the method realizing dual band operation according to claim 5, is characterized in that, the diameter D of described first helical coil is 3mm, wire diameter d is 0.2mm, and interval S is 0.95mm, length L is 135mm; The diameter D of described second helical coil is 5mm, wire diameter d is 0.8mm, and interval S is 1.3mm, length L is 75mm; The coupling length L3 of described first helical coil and the second helical coil is 70mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410795051.8A CN104538727A (en) | 2014-12-22 | 2014-12-22 | Dual-frequency-band spiral antenna and method for achieving dual-frequency-band work |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410795051.8A CN104538727A (en) | 2014-12-22 | 2014-12-22 | Dual-frequency-band spiral antenna and method for achieving dual-frequency-band work |
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| CN104538727A true CN104538727A (en) | 2015-04-22 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301056A (en) * | 1999-12-23 | 2001-06-27 | 电子部品研究院 | Double frequency band antenna for mobile communication unit |
| JP2001177321A (en) * | 1999-12-17 | 2001-06-29 | Harada Ind Co Ltd | Two-wave common use antenna |
| CN101958457A (en) * | 2009-07-31 | 2011-01-26 | 海能达通信股份有限公司 | Wideband dual-frequency antenna |
| US20120075153A1 (en) * | 2010-09-27 | 2012-03-29 | Motorola, Inc. | Wideband and multiband external antenna for portable transmitters |
| CN102544684A (en) * | 2011-11-23 | 2012-07-04 | 杨鹤鸣 | Radio-television integration receiving antenna |
| CN204348899U (en) * | 2014-12-22 | 2015-05-20 | 杨鹤鸣 | Two-band helical antenna |
-
2014
- 2014-12-22 CN CN201410795051.8A patent/CN104538727A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001177321A (en) * | 1999-12-17 | 2001-06-29 | Harada Ind Co Ltd | Two-wave common use antenna |
| CN1301056A (en) * | 1999-12-23 | 2001-06-27 | 电子部品研究院 | Double frequency band antenna for mobile communication unit |
| CN101958457A (en) * | 2009-07-31 | 2011-01-26 | 海能达通信股份有限公司 | Wideband dual-frequency antenna |
| US20120075153A1 (en) * | 2010-09-27 | 2012-03-29 | Motorola, Inc. | Wideband and multiband external antenna for portable transmitters |
| CN102544684A (en) * | 2011-11-23 | 2012-07-04 | 杨鹤鸣 | Radio-television integration receiving antenna |
| CN204348899U (en) * | 2014-12-22 | 2015-05-20 | 杨鹤鸣 | Two-band helical antenna |
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Effective date of registration: 20160613 Address after: 518000, No. 1-3, No. 13 Coal Field Road, Longgang street, Longgang District, Shenzhen, Guangdong Applicant after: Shenzhen Tianli automobile supplies Co. Ltd. Address before: 603 D block 4, Buji century garden, Longgang District, Guangdong, Shenzhen 518000, China Applicant before: Yang Heming |
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Address after: 518000 2-4, level 13, 19, new town community road, Longgang street, Longgang District, Shenzhen, Guangdong Applicant after: Shenzhen Tianli Automobile Electronic Technology Co., Ltd. Address before: 518000 Guangdong Longgang Shenzhen District, Longgang, Longgang, new town community road 13 1-3 Applicant before: Shenzhen Tianli automobile supplies Co. Ltd. |
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Application publication date: 20150422 |
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