CN102104188A - Antenna with multi-bands - Google Patents
Antenna with multi-bands Download PDFInfo
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- CN102104188A CN102104188A CN2009102254660A CN200910225466A CN102104188A CN 102104188 A CN102104188 A CN 102104188A CN 2009102254660 A CN2009102254660 A CN 2009102254660A CN 200910225466 A CN200910225466 A CN 200910225466A CN 102104188 A CN102104188 A CN 102104188A
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- antenna
- radiant element
- bending section
- ground plane
- flange
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Abstract
The invention discloses an antenna with multi-bands, comprising a ground plane which defines a plurality of different band sections, and a first radiation element arranged on the ground plane, wherein the first radiation element comprises a first bending section, a second bending section, and a second radiation element which extends from the second bending section of the first radiation element, and a front end and a tail end of the second radiation element are both provided with a flange. In one embodiment, the antenna of the invention is connected with an interface port of an electronic apparatus, and the different band sections arranged on the ground plane can be adjusted in dependence on distances between the band sections and the interface port in such a way that the antenna can correct frequency response to reach an applicable band, with an adjustable bandwidth of 330 MHz.
Description
Technical field
The present invention relates to a kind of Antenna Design, be meant a kind of Antenna Design of tool multifrequency especially.
Background technology
Well known, antenna is a kind of electromagnetic wave transducer (transducer) that is designed to transmit or receive.In other words, it is electric current that antenna will be changed electromagnetic wave, and vice versa.Extensively, antenna is worked in air and outer space usually, also can move under water, even work under some frequency among soil and the rock.
From the above, in the past few years, because the microstrip antenna required size is (about 0.01～0.05free-space wave length) as thin as a wafer, for other kind antennas is to meet micro electronmechanical processing procedure most, and possessed that volume is little, in light weight, thin thickness and low manufacture cost and other advantages, because these attracting characteristics are so be applied on many military affairs, space shuttle, satellite and the commercial use.
A kind ofly be suggested as the such PIFA antenna structure of microstrip antenna, as shown in Figure 1, the structural representation of typical case PIFA antenna structure 1, its structure is as follows, the circular F of one antenna main oscillating body (about 1/4 λ of length), 11, one PIFA antenna 12, wherein the top ground connection of this F head, constitute a feeder line (feed line) 13, by a strip line (stripline) and the one 1/4 circular arc stripline that extend thereof and be formed on that a hole (hole) 14 and is formed on PIFA antenna body ovalize hole 15 in the circular F head of PIFA antenna.Be illustrated as in more detail, a kind of PIFA unipole antenna then is at the metal wire of unipole antenna width of cloth beam adding one with system ground end road, makes antenna except operating in quarter-wave size, can also effectively reach good impedance matching.
But unfortunately, this PIFA antenna bandwidth and the neither ideal of frequency range percentage, thereby limit its range of application.
Summary of the invention
At the too little disappearance of the frequency range of known PIFA antenna, one purpose of this case provides a kind of antenna of tool multifrequency, the antenna of this tool multifrequency comprises a ground plane that defines a plurality of different frequency bands sections, be configured in one first radiant element on this ground plane, wherein this first radiant element comprises one first bending section and one second bending section, this ground plane extends from this first bending section, reach this second bending, one second radiant element that section extended from this first radiant element, promptly this first bending section and this ground plane of this first radiant element electrically connect, this second bending section and this second radiant element of this first radiant element electrically connect, and a front end of this second radiant element has one first flange, and an end has one second flange.This first radiant element also has a load point and is electrically connected to a signal source, and the preferable selection of this load point is to be arranged at this second bending section, and another the preferable selection of this load point is arranged on contiguous this ground plane.Wherein adjust this second width of cloth and penetrate the frequency of operation that the length of element can be controlled this antenna, preferable mode be adjust this second width of cloth penetrate element from this first flange to the length of this second bending section electric connection place of this first radiant element, can control the frequency of operation of this antenna.Wherein adjust this second width of cloth again and penetrate this first flange and the shape of this one second flange and the impedance matching that size can be adjusted this antenna of element, preferable selection is that the area of this first flange of this second radiant element is greater than the area of this second flange, this first flange that another kind of preferable selection is this second radiant element is used for the impedance matching of this antenna of coarse adjustment, and this second flange of this second radiant element is used to finely tune the impedance matching of this antenna.Moreover this second width of cloth penetrates that element is rough to be arranged in parallel with this ground plane.Form a depressed part between this of this first radiant element at least two bendings section and this ground plane again, this depressed part is used to adjust the impedance matching of this antenna.
In an embodiment, when proposing this case on the interface Port that this antenna is connected in an electronic installation, its framework is in these different frequency bands sections bases of this ground plane and adjusting apart from distance of this interface Port, make it revise the frequency band that its frequency response can reach application, can adjust frequency range 330MHz.
Another purpose of this case provides a kind of antenna of tool multifrequency, structure than this antenna at length is stated as, this first radiant element is made of one first bending section and one second bending section in this antenna, wherein this first bending section and this second bending section all comprise at least one bending angle, and each this bending angle is 90 degree.
Another purpose of this case provides a kind of antenna of tool multifrequency, structure than this antenna at length is stated as, this first radiant element is made of one first bending section and one second bending section in this antenna, wherein this first bending section and this ground plane of this first radiant element form a depressed part, can adjust the impedance matching of this antenna.
Another purpose of this case provides a kind of antenna of tool multifrequency, the antenna of this tool multifrequency comprises a ground plane that defines a plurality of different frequency bands sections, one first radiant element that is configured on this ground plane comprises at least two wherein load points that bend sections, are positioned at these at least two bending sections of this first radiant element, reaches one second radiant element that extends from this first radiant element.Wherein, this load point is electrically connected to a signal source, and the preferable selection of this load point is that contiguous this ground plane is arranged at first radiant element.Wherein, this second radiant element is a strip and the one front end has one first flange and an end has one second flange, adjust this second width of cloth and penetrate this first flange and the shape of this one second flange and the impedance matching that size can be adjusted this antenna of element, preferable selection is the impedance matching that this first flange of this second radiant element is used for this antenna of coarse adjustment, and this second flange of this second radiant element is used to finely tune the impedance matching of this antenna.Wherein, adjust this second width of cloth and penetrate the frequency of operation that the length of element can be controlled this antenna, preferable selection be adjust this second width of cloth penetrate element from this first flange to the length of this second bending section electric connection place of this first radiant element, can control the frequency of operation of this antenna.Wherein, this second width of cloth penetrates that the preferable selection of element is rough to be arranged in parallel with this ground plane.Wherein, this first radiant element is made of at least two bending sections in this antenna, and each this first bending section and this second bending section all comprise at least one bending angle, and this bending section comprises a bending angle all at least.
In an embodiment, when proposing this case on the interface Port that this antenna is connected in an electronic installation, its framework is in these different frequency bands sections bases of this ground plane and adjusting apart from distance of this interface Port, make it revise the frequency band that its frequency response can reach application, can adjust frequency range 330MHz.
Under an actual measurement situation, when a current path that a signal source this load point by this first radiant element produces, this current path can be earlier via this second radiant element that electrically connects with this first radiant element, afterwards, be a plurality of bending sections based on this this first radiant element, also can reduce the reflected current of this current path, make and measure voltage standing wave ratio (Voltage standing wave ratio, VSWR) numerical value generally all is equal to or less than 2 as criterion with VSWR near an ideal value.
Description of drawings
Fig. 1 is known PIFA antenna assumption diagram.
Fig. 2 (a) is the front view of the antenna of multiband of the present invention.
Fig. 2 (b) is the front view of the antenna of multiband of the present invention.
The current path schematic diagram that the load point that Fig. 3 is a signal source by this signal source of this first radiant element produces.
Fig. 4 (a) and 4 (b) are respectively the schematic diagram of fixed antenna mode.
Fig. 5 can reach 330MHz for the present invention at the frequency range adjusted that changes the welding position.
Fig. 6 is the voltage standing wave ratio schematic diagram of the antenna of tool multiband of the present invention.
Fig. 7 returns loss figure for the antenna of tool multiband of the present invention.
Fig. 8 (a)-8 (c) is the level and the vertical plane radiation field shape figure (Y-Z plane) of the antenna of tool multiband of the present invention.
Fig. 9 (a)-9 (c) is the level and the vertical plane radiation field shape figure (Z-X plane) of the antenna of tool multiband of the present invention.
Figure 10 (a)-10 (c) is the level and the vertical plane radiation field shape figure (X-Y plane) of the antenna of tool multiband of the present invention.
[main element symbol description]
Antenna main oscillating body (about 1/4 λ of length) 11
Circular F 12
Feeder line (feed line) 13
Hole (hole) 14
The antenna 2 of tool multiband
First radiant element 21
Second radiant element 22
The first bending section 211
The second bending section 212
Second radiant element 22
Load point nd
Zone P
Current path A1, A2
Embodiment
Below will cooperate graphic and embodiment describes feature of the present invention and execution mode in detail, content is enough to make those skilled in the art can fully understand the applied technological means of technical solution problem of the present invention easily and implements according to this, realizes the attainable effect of the present invention by this.
General commercial antenna has following requirement: 1. volume is little, and is 2. in light weight, 3. thin thickness, 4. volume production easily, 5. low price, 6. good looking appearance, 7. antenna itself is characteristic, 8. in-building type antenna preferably, 9. applicable to product miscellaneous, 10. performance meets certain standard.
The design of existing PIFA has following shortcoming, and is too little as frequency range, centre frequency is unstable and produce problems such as yield is low.Therefore, the antenna of a kind of tool multiband on the WLAN commercial products such as IEEE 802.11b, IEEE802.11g Bluetooth of a kind of 2.4GHz of being used in ISM band of design has its necessity.
Moreover, know this skill personage as can be known, the critical parameters that influence antenna performance have a lot, can adjust in the Antenna Design process usually, as resonance frequency, impedance, gain, aperture or antenna pattern, polarization, efficient and frequency range etc.Therefore, when the profile framework of the antenna that designs this case tool multiband, also need with reference to above-mentioned antenna parameter.Need mention that also manufacturing antenna substrate material is still needed and considered the size of dielectric constant, is preferable selection as adopting dielectric constant 4.6 epoxy glass fiber plate FR4.
Be that front view and Fig. 2 (b) of the antenna of tool multiband of the present invention is isogonism front view of the present invention with reference to figure 2 (a) in the lump please.On the main body, in Fig. 2 (a), the antenna 2 of this tool multiband (the following antenna that is called for short) comprises a ground plane 20, one first radiant element 21 and one second radiant element 22, structure in more detail is illustrated as: it is electrically connected at a ground end this ground plane 20, this first radiant element 21 is configured in this ground plane 20, and comprise one first bending section 211 and one second bending section 212, just, this first radiant element 21 is provided with a plurality of bending sections (containing at least one bending section), wherein as can be known at Fig. 2 (a), this first bending section 211 and this second bending section 212 comprise a bending angle all at least, and each this bending angle all is 90 degree in present embodiment.And this second radiant element 22, being a strip, this second radiant element 22 extends from this second bending section 212, and a front end of this second radiant element 22 has one first flange 221 and an end has one second flange 222.Preferably, the area of first flange 221 of the front end of this second radiant element 22 is greater than the area of second flange 222 of the rear end of this second radiant element 22, and this second bending section 212 is rough to be set in parallel with ground plane 20.
And improve known PIFA antenna bandwidth and the following explanation of impedance matching at antenna parameter: define this second bending section 212 is used to adjust this antenna 2 to the zone between first flange 221 of the front end of this second radiant element 22 frequency of operation, and first flange 221 of the front end of this second radiant element 22 is used for the impedance matching of this antenna 2 of coarse adjustment, second flange 222 that reaches the rear end of this second radiant element 22 is used to finely tune the impedance matching of this antenna 2, and a depressed part of this first radiant element 21 is used to adjust the impedance matching of this antenna 2 to the regional P between this ground plane 20.
Then, please refer to Fig. 3, current path A1 (being represented by dotted lines) schematic diagram that the load point nd that this figure is a signal source (cable) by this signal source of this first radiant element 21 produces, wherein this load point nd is positioned at this second bending section 212, and load point nd is arranged at contiguous this ground plane 20 of position system of this second bending section 212 in present embodiment.
This current path A1 flow to this second radiant element 22 along this second bending section 212 of this first radiant element 21, afterwards, this first bending section 211 and this second bending section 212 that this current path A1 is back to this first radiant element 21 through contrajet (at this moment, this current path A1 is referred to as a current path A2, be represented by dotted lines), at this moment, this current path A2 that is produced because of a plurality of bending angles of this first bending section 211 and this second bending section 212 of flowing through (wherein, each bending angle all is 90 degree) and then cause the reflected current of this current path A2 to reduce, also can reduce the voltage standing wave ratio (VSWR) of this antenna 2, as shown in Figure 6, voltage standing wave ratio schematic diagram (operational requirements that can contain required 2.29GHz to the 2.59GHz frequency band of present Wireless LAN WiFi, wherein VSWR drops to an expectation maximum 2) for the antenna of tool multiband of the present invention.
Moreover when proposing the present invention on the interface Port 4 of an electronic installation that this antenna 2 is connected in notebook computer or mobile phone such as this type, shown in Fig. 4 (a), its fixed antenna mode is mechanism's formula fixed antenna, can adjust according to different systems.Shown in Fig. 4 (b), its fixed antenna mode uses the back side (representing with oblique line) of the ground plane 20 of antenna 2 to fix this antenna 2 by viscose glue to paste sticking mode.
Especially, as Fig. 2 (a), its framework these different frequency bands sections (representing) of this ground plane with alphabetical A, B, C, D and E according to the adjusting of as shown in Figure 4 this interface Port 4 apart from distance, make it revise the frequency band that its frequency response can reach application, can adjust frequency range 330MHz, as shown in Figure 5, wherein, in the figure in the dotted line presentation graphs 2 (a) with the represented frequency band of letter e, a solid line presentation graphs 2 (a) is with represented another frequency band of alphabetical A.
In addition, measure by experiment, can draw antenna 2 other radiation characteristics of this tool multiband.Please refer to return the average gain table of antenna that loss (Retum Loss) figure, Fig. 8 (a)-8 (c) for the level of the antenna of this tool multiband and vertical plane radiation field shape figure (Y-Z plane), Fig. 9 (a)-9 (c) for the level of the antenna of this tool multiband and vertical plane radiation field shape figure (Z-X plane), Figure 10 (a)-10 (c) for the level of the antenna of this tool multiband and vertical plane radiation field shape figure (X-Y plane) and table one be the tool multiband of this case of Fig. 7 for the antenna of tool multiband.
Table one
Its definition of radiation characteristic and the detailed measurement mode of the antenna 2 of wherein above-mentioned this tool multiband are well known to those skilled in the art, and do not give unnecessary details at this.
In sum, the present invention is by this first bending section and this second bending section of this first radiant element, reduce voltage standing wave ratio and make antenna reach the effect of wideband or double frequency, and the overbending direction of this first bending section and this second bending section, bending number etc. all can be adjusted respectively according to required.Therefore, antenna of the present invention not only can be reached the effect of wideband or multifrequency easily, and it is simple in structure, firm, can effectively reduce production costs.
The present invention must be thought and is to modify the scope of right neither disengaging such as the desire protection of attached claim institute as all by the personage Ren Shi craftsman who is familiar with this skill.
Claims (11)
1. the antenna of a tool multiband is characterised in that this antenna comprises on the interface Port that is connected in an electronic installation:
One ground plane defines a plurality of different frequency bands sections on it;
One first radiant element is configured on this ground plane, and this first radiant element comprises one first bending section and one second bending section, and this ground plane extends from this first bending section; And
One second radiant element is a strip, and this second radiant element extends from this second bending section, and a front end of this second radiant element has one first flange and an end has one second flange.
2. antenna as claimed in claim 1 is characterized in that this second bending section also has a load point that is electrically connected to a signal source, and wherein contiguous this ground plane of this load point is provided with.
3. antenna as claimed in claim 1 is characterized in that this second width of cloth penetrates that element is rough to be arranged in parallel with this ground plane.
4. antenna as claimed in claim 1 is characterized in that this first bending section and this second bending section all comprise at least one bending angle, and wherein this bending angle all is 90 degree.
5. antenna as claimed in claim 1, it is characterized in that these a plurality of different frequency bands sections according to the adjusting of this interface Port apart from distance.
6. antenna as claimed in claim 1, this second bending section that it is characterized in that defining this first radiant element is used to adjust the frequency of operation of this antenna to the zone between this first flange of this second radiant element.
7. antenna as claimed in claim 1, the area of this first flange that it is characterized in that this second radiant element is greater than the area of this second flange, wherein this first flange of this second radiant element is used for the impedance matching of this antenna of coarse adjustment, and this second flange of this second radiant element is used to finely tune the impedance matching of this antenna.
8. antenna as claimed in claim 1 is characterized in that the frequency range of the wireless signal that this antenna receives or sends is essentially 330MHz.
9. formation one depressed part between the antenna as claimed in claim 1, this first bending district that it is characterized in that this first radiant element and this ground plane, this depressed part is used to adjust the impedance matching of this antenna.
10. the antenna of a tool multiband is characterised in that this antenna comprises on the interface Port that is connected in an electronic installation:
One ground plane defines a plurality of different frequency bands sections on it;
One first radiant element is configured on this ground plane, and is provided with at least two bending sections, and each this bending section comprises a bending angle all at least;
One load point is positioned at one of them of these at least two of this first radiant element bending sections, and this load point is electrically connected to a signal source; And
One second radiant element is a strip, and this second radiant element extends from this first radiant element, and a front end of this second radiant element has one first flange and an end has one second flange.
11. antenna as claimed in claim 10 is characterized in that these at least two of this first radiant element bend formation one depressed part between sections and this ground plane, this depressed part is used to adjust the impedance matching of this antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910225466.0A CN102104188B (en) | 2009-12-16 | 2009-12-16 | The antenna of tool multiband |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910225466.0A CN102104188B (en) | 2009-12-16 | 2009-12-16 | The antenna of tool multiband |
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| Publication Number | Publication Date |
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| CN102104188A true CN102104188A (en) | 2011-06-22 |
| CN102104188B CN102104188B (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910225466.0A Expired - Fee Related CN102104188B (en) | 2009-12-16 | 2009-12-16 | The antenna of tool multiband |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474767A (en) * | 2013-09-18 | 2013-12-25 | 中国科学院长春光学精密机械与物理研究所 | Four-frequency plane microstrip antenna with miniaturized microwave absorption structure |
| CN104092004A (en) * | 2013-04-01 | 2014-10-08 | 深圳富泰宏精密工业有限公司 | Antenna structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1248317A1 (en) * | 2001-04-02 | 2002-10-09 | Nokia Corporation | Electrically tunable multiband planar antenna |
| TW555177U (en) * | 2002-11-29 | 2003-09-21 | Hon Hai Prec Ind Co Ltd | Multi-band antenna |
| WO2005109567A1 (en) * | 2004-04-29 | 2005-11-17 | Molex Incorporated | Low profile antenna |
| CN101465465A (en) * | 2007-12-20 | 2009-06-24 | 智易科技股份有限公司 | Double-frequency antenna |
| CN101499556A (en) * | 2008-02-03 | 2009-08-05 | 广达电脑股份有限公司 | Double-frequency antenna |
-
2009
- 2009-12-16 CN CN200910225466.0A patent/CN102104188B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1248317A1 (en) * | 2001-04-02 | 2002-10-09 | Nokia Corporation | Electrically tunable multiband planar antenna |
| TW555177U (en) * | 2002-11-29 | 2003-09-21 | Hon Hai Prec Ind Co Ltd | Multi-band antenna |
| WO2005109567A1 (en) * | 2004-04-29 | 2005-11-17 | Molex Incorporated | Low profile antenna |
| CN101465465A (en) * | 2007-12-20 | 2009-06-24 | 智易科技股份有限公司 | Double-frequency antenna |
| CN101499556A (en) * | 2008-02-03 | 2009-08-05 | 广达电脑股份有限公司 | Double-frequency antenna |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092004A (en) * | 2013-04-01 | 2014-10-08 | 深圳富泰宏精密工业有限公司 | Antenna structure |
| CN103474767A (en) * | 2013-09-18 | 2013-12-25 | 中国科学院长春光学精密机械与物理研究所 | Four-frequency plane microstrip antenna with miniaturized microwave absorption structure |
| CN103474767B (en) * | 2013-09-18 | 2015-02-18 | 中国科学院长春光学精密机械与物理研究所 | Four-frequency plane microstrip antenna with miniaturized microwave absorption structure |
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| CN102104188B (en) | 2015-08-19 |
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