CN200994001Y - Adjustable impedance matching antenna - Google Patents
Adjustable impedance matching antenna Download PDFInfo
- Publication number
- CN200994001Y CN200994001Y CNU2006201647518U CN200620164751U CN200994001Y CN 200994001 Y CN200994001 Y CN 200994001Y CN U2006201647518 U CNU2006201647518 U CN U2006201647518U CN 200620164751 U CN200620164751 U CN 200620164751U CN 200994001 Y CN200994001 Y CN 200994001Y
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- metal arm
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Abstract
The utility model discloses an antenna that comprises a base plate, a radiating component, a feed-in component, a connecting component and a matching circuit. The base plate has a first side and a second side, wherein the first side is provided with a short circuit point and a grounding point. The radiating component comprises a first radiating body, a second radiating body and a first metal arm. The first radiating body and the second radiating body parallel the first side, and the first metal arm is coupled with the first radiating body and the second radiating body. The feed-in component is coupled between the first metal arm and the grounding point, and the connecting component is coupled between the first metal arm and the short circuit point. The matching circuit comprises a second metal arm and a matching component. The second metal arm is an extension of the first metal arm, and the matching component is coupled with the second metal arm.
Description
Technical field
The utility model relates to a kind of antenna of adjustable impedance coupling, particularly a kind of antenna of adjusting impedance matching by a match circuit.
Background technology
Along with the flourish of wireless telecommunications and trend that mobile communication product is microminiaturized, the ornaments position and the space of antenna are compressed, and relatively cause the difficulty in the design, the miniature antenna that some are embedded thereby be suggested.Generally speaking, more general at present employed miniature antenna has antenna component (ChipAntenna) and planar antenna (Planar Antenna) etc., and this type antenna all has the little characteristics of volume.The planar antenna design also has many, for example microstrip antenna (microstrip antenna), printing type aerial (printed antenna) and planar inverted F-shape antenna (Planar Inverted F Antenna, PIFA) etc., these antenna widely is applied to wireless terminal devices such as GSM, DCS, UMTS, WLAN and bluetooth, for example mobile phone, WLAN or the like.
Please refer to Fig. 1.Fig. 1 is the schematic diagram of prior art one double frequency antenna 10.Dual-band antenna 10 comprises a substrate 12, a radiation assembly 14, a feed-in assembly 18 and a coupling assembling 16.Substrate 12 is roughly a rectangle, has a first side 122 and a second side 124, comprises a short dot 126 and an earth point 128 on the first side 122.Radiation assembly 14 is arranged on the first side 122, and it comprises one first radiant body 141, one second radiant body 142 and one first metal arm 143.First radiant body 141 is roughly parallel to first side 122.Second radiant body 142 is roughly parallel to first side 122, and extends towards the rightabout with first radiant body 141.The tail end of first radiant body 141 and second radiant body 142 comprises bending 146,148, is used for increasing the radiation efficiency of first radiant body 141 and second radiant body 142 respectively.First metal arm 143 is approximately perpendicular to first side 122, includes the junction that one first end 144 is coupled to first radiant body 141 and second radiant body 142, and one second end 145.Feed-in assembly 18 is coupled between second end 145 and earth point 128 of first metal arm 143.Coupling assembling 16 is roughly the L type, includes second end 145 that one first end 163 is coupled to first metal arm 143, and one second end 165 is coupled to the short dot 126 of substrate 12.
As shown in Figure 1, the length of first radiant body 141 can be gone out the signal (low frequency) of first resonance mode by first radiant body, 141 resonance greater than the length of second radiant body 142, is gone out the signal (high frequency) of second resonance mode by second radiant body, 142 resonance.The length of first radiant body 141 and first metal arm, 143 length sums are approximately 1/4th (λ/4) of the signal wavelength of first resonance mode that dual-band antenna 10 produced.The length of second radiant body 142 and first metal arm, 143 length sums, be approximately second resonance mode that dual-band antenna 10 produced signal wavelength 1/4th.Wherein, substrate 12 is made of dielectric material or magnetic material, and be electrically connected at one systematically the end (GND).Radiation assembly 14 is to be made by a single sheet metal with coupling assembling 16.
Please refer to Fig. 2.Fig. 2 is the schematic diagram of voltage standing wave ratio of the dual-band antenna 10 of Fig. 1.That transverse axis is represented is frequency (GHz), is distributed in 0.7GHz to 2.5GHz, and that the longitudinal axis is represented is voltage standing wave ratio VSWR, and it is defined as VSWR=Vmax/Vmin.Indicate the frequency and the voltage standing wave ratio of eight punctuates among the figure, for instance, the frequency of punctuate 1 is about 0.826GHz, and voltage standing wave ratio VSWR is about 3.503; The frequency of punctuate 8 is about 2.17GHz, and voltage standing wave ratio VSWR is about 1.943.The frequency range of first resonance mode that produced of dual-band antenna 10 drops near the 900MHz as can be seen, and the frequency range of second resonance mode drops near the 1900MHz.
In the life now, notebook has been one of electric consumers common in the life.(standard that has become notebook one of is equipped with for Wireless Local Area Network, WLAN) online by WLAN.But, then can't get online without being tethered to a cable if be in an environment that does not have WLAN.Therefore, arise spontaneously by the idea that notebook is able to wireless and high speed Internet access by the mobile phone base station, then antenna is not only wanted the operational frequency bands of compliant wireless local area networks network, also will meet radio wide area network (Wireless Wide Area Network, operational frequency bands WWAN) simultaneously.How to dwindle antenna size, promote antenna performance and improve impedance matching, promptly become the important problem in this field.
The utility model content
The purpose of this utility model provides a kind of antenna of adjustable impedance coupling, and this antenna comprises a substrate, a radiation assembly, a feed-in assembly, a coupling assembling and a match circuit.This substrate has a first side and a second side, comprises a short dot and an earth point on this first side.Radiation assembly is arranged on this first side.This radiation assembly comprises one first radiant body, one second radiant body and one first metal arm.This first radiant body is roughly parallel to this first side.This second radiant body is roughly parallel to this first side, and extends towards the rightabout with this first radiant body.This first metal arm is approximately perpendicular to this first side, includes the junction that one first end is coupled to this first radiant body and this second radiant body, and one second end.This feed-in assembly is coupled between this second end and this earth point of this first metal arm.This coupling assembling includes this second end that one first end is coupled to this first metal arm, and one second end is coupled to this short dot.This match circuit is arranged between this first side of this radiation assembly and this substrate.This match circuit comprises one second metal arm and a matching component.This second metal arm is to be extended by this first metal arm.This matching component is coupled to this second metal arm, is used to provide an impedance.Wherein, this matching component is made of passive block, and this matching component can be inductance, electric capacity or resistance.
Advantage of the present utility model is, the antenna of adjustable impedance coupling is provided, can resonance goes out the impedance frequency range of different frequency by the length of adjusting first radiant body, second radiant body and first metal arm.In addition, match circuit couple the position difference, can be by adjusting first length and second length is adjusted the position of matching component, and obtain different impedance matchings.In antenna circuit, increase passive blocks such as matching component, can effectively promote antenna performance and improve impedance matching.Arrange in pairs or groups second antenna and antenna of the present utility model are incorporated into WWAN and WLAN on the same antenna framework again, not only can save the space and reduce cost, and more can allow antenna widely be applied to wireless terminal devices such as GSM, WLAN and bluetooth.
Description of drawings
Fig. 1 is the schematic diagram of prior art one antenna.
Fig. 2 is the schematic diagram of voltage standing wave ratio of the antenna of Fig. 1.
Fig. 3 illustrates the schematic diagram of the antenna of adjustable impedance coupling for the utility model one embodiment.
Fig. 4 is the schematic diagram of voltage standing wave ratio of the antenna of Fig. 3.
Fig. 5 illustrates the schematic diagram of the antenna of adjustable impedance coupling for another embodiment of the utility model.
Fig. 6 illustrates the schematic diagram of the antenna of adjustable impedance coupling for another embodiment of the utility model.
Fig. 7 illustrates the schematic diagram of the antenna of adjustable impedance coupling for another embodiment of the utility model.
Fig. 8 is a radiation pattern figure of the antenna of Fig. 3.
Fig. 9 is another radiation pattern figure of the antenna of Fig. 3.
Figure 10 is another radiation pattern figure of the antenna of Fig. 3.
The primary clustering symbol description
10 dual-band antennas
30,50,60,70 antennas
12,32 substrates
14,34,54 radiation assemblies
18,38 feed-in assemblies, 16,36 coupling assemblings
31,61,71 match circuits
122,124,324 second sides, 322 first sides
126,326 short dots, 128,328 earth points
141,341,541 first radiant bodies
142,342,542 second radiant bodies
143,343,543 first metal arms
146,148,346,348,546,548 bendings
144,163,344,363,544 first ends
145,165,345,365,545 second ends
37,67,77 second metal arms
39,69,79 combo parts
X, Y, Z reference axis
52 parasitic element, 58 second antennas
56 second passive blocks
L1 first length
L2 second length
Embodiment
Please refer to Fig. 3.Fig. 3 illustrates the schematic diagram of the antenna 30 of adjustable impedance coupling for the utility model one embodiment.Antenna 30 comprises a substrate 32, a radiation assembly 34, a feed-in assembly 38, a coupling assembling 36 and a match circuit 31.Substrate 32 is roughly a rectangle, has a first side 322 and a second side 324, comprises a short dot 326 and an earth point 328 on first side 322.Radiation assembly 34 is arranged on the first side 322, and it comprises one first radiant body 341, one second radiant body 342 and one first metal arm 343.First radiant body 341 is roughly parallel to first side 322.Second radiant body 342 is roughly parallel to first side 322, and extends towards the rightabout with first radiant body 341.The tail end of first radiant body 341 and second radiant body 342 comprises bending 346,348, is used for increasing the radiation efficiency of first radiant body 341 and second radiant body 342 respectively.First metal arm 343 is approximately perpendicular to first side 322, includes the junction that one first end 344 is coupled to first radiant body 341 and second radiant body 342, and one second end 345.Feed-in assembly 38 is coupled between second end 345 and earth point 328 of first metal arm 343.Coupling assembling 36 is roughly the L type, includes second end 345 that one first end 363 is coupled to first metal arm 343, and one second end 365 is coupled to the short dot 326 of substrate 32.The length of coupling assembling 36 is one first length L 1.Match circuit 31 is arranged between the first side 322 of radiation assembly 34 and substrate 32, and it includes one second metal arm 37 and a matching component 39.Second metal arm 37 is to be extended by first metal arm 343, and its length is one second length L 2.Matching component 39 is coupled to second metal arm 37, is used to provide an impedance.Wherein, matching component 39 is coupled between second metal arm 37 and the coupling assembling 36.In the present embodiment, first length L 1 is about λ/8-2 λ/5 (when frequency is 1900MHz), and the ratio of second length L 2 and first length L 1 is L2/L1=0.125-0.75.When matching component 39 is when being realized by an electric capacity, its capacitance size is 0.5pF-5pF, is not limited to fixed numeric values, also is not defined as electric capacity, visual user's demand and adjusting; When matching component 39 is when being realized by an inductance, its inductance value size is 1nH-10nH, is not limited to fixed numeric values.The pass of second length L 2 and first length L 1 is L1/3＜L2＜L1/2.
Please continue with reference to figure 3.The length of first radiant body 341 then can be gone out the signal (low frequency) of first resonance mode by first radiant body, 341 resonance greater than the length of second radiant body 342, is gone out the signal (high frequency) of second resonance mode by second radiant body, 342 resonance.The length of first radiant body 341 and first metal arm, 343 length sums are approximately 1/4th (λ/4) of the signal wavelength of first resonance mode that antenna 30 produced.The length of second radiant body 342 and first metal arm, 343 length sums, be approximately second resonance mode that antenna 30 produced signal wavelength 1/4th.Wherein, substrate 32 is made of dielectric material or magnetic material, and be electrically connected at one systematically the end (GND).Radiation assembly 34, coupling assembling 36 and second metal arm are to be made by a single sheet metal.Matching component 39 is made of passive block, as inductance, electric capacity or resistance.Antenna 30 is to be located in the wireless communication apparatus, as a notebook, a mobile phone or a personal digital assistant (Personal Digital Assistant, PDA).
Please refer to Fig. 4, Fig. 4 is the schematic diagram of voltage standing wave ratio of the antenna 30 of Fig. 3.That transverse axis is represented is frequency (GHz), is distributed in 0.7GHz to 2.5GHz, and that the longitudinal axis is represented is voltage standing wave ratio VSWR, and it is defined as VSWR=Vmax/Vmin.Indicate the frequency and the voltage standing wave ratio of eight punctuates among the figure, eight punctuate frequencies that indicated with Fig. 2 are identical.For instance, the frequency of punctuate 1 is about 0.826GHz, and voltage standing wave ratio VSWR is about 2.84; The frequency of punctuate 8 is about 2.17GHz, and voltage standing wave ratio VSWR is about 1.703.Comparison diagram 4 and Fig. 2 as can be known, all the dual-band antenna 10 than Fig. 1 is good with impedance matching for the VSWR of antenna 30 of the present utility model.
Please refer to Fig. 5.Fig. 5 illustrates the schematic diagram of the antenna 50 of adjustable impedance coupling for another embodiment of the utility model.The framework of antenna 50 and the antenna of Fig. 3 30 are similar, and only a radiation assembly 54 of antenna 50 has increased by one second passive block 56 than radiation assembly 34.Second passive block 56 can be made of inductance, electric capacity or resistance, is arranged on any one position of radiation assembly 54.In addition, antenna 50 comprises a parasitic element 52 and one second antenna 58.Parasitic element 52 is formed between substrate 32 and the radiation assembly 54, is used for expanding frequency range or resonance and goes out some specific frequency range.Second antenna 58 is arranged on the first side 322 of substrate 32, and it can be a Wi-Fi antenna, a Wi-Max antenna, a UWB antenna, a gps antenna or a DVB-H antenna.Note that above-mentioned parasitic element 52, second antenna 58 and second passive block 56 only are used as example explanation of the present utility model, those assemblies are not to be necessary restrictive condition of the present utility model.Parasitic element 52, second antenna 58 and second passive block 56 are optional (Optional) assembly.
Please refer to Fig. 6.Fig. 6 illustrates the schematic diagram of the antenna 60 of adjustable impedance coupling for another embodiment of the utility model.Antenna 60 and antenna 50 differences are that antenna 60 included match circuits 61 are arranged between the first side 322 of radiation assembly 54 and substrate 32, and match circuit 61 includes one second metal arm 67 and a matching component 69.Second metal arm 67 is to be extended by first metal arm 543.Matching component 69 is coupled to second metal arm 67, is used to provide an impedance.It should be noted that matching component 69 is coupled between the first side 322 of second metal arm 67 and substrate 32.
Please refer to Fig. 7.Fig. 7 illustrates the schematic diagram of the antenna 70 of adjustable impedance coupling for another embodiment of the utility model.Antenna 70 and antenna 50 differences are that antenna 70 included match circuits 71 are arranged between the first side 322 of radiation assembly 54 and substrate 32, and match circuit 71 includes one second metal arm 77 and a matching component 79.Second metal arm 77 is to be extended by first metal arm 543.Matching component 79 is coupled to second metal arm 77, is used to provide an impedance.It should be noted that matching component 79 is coupled between second metal arm 77 and first radiant body 541, similarly, matching component 79 also can be coupled between second metal arm 77 and second radiant body 542.
Please refer to Fig. 8, Fig. 9 and Figure 10.Fig. 8, Fig. 9 and Figure 10 are respectively the radiation pattern figure into the antenna 30 of Fig. 3.Wherein, Fig. 8 is the measurement result of antenna 30 in the XY plane, and Fig. 9 is the measurement result of antenna 30 in the XZ plane, and Figure 10 is the measurement result of antenna 30 in the YZ plane.By measurement result as can be known, the main pole radiation of antenna all presents the perpendicular polarization characteristic, and produces the field pattern that is roughly the omni-directional radiation on the XY plane, can satisfy the operational requirements of WLAN system.
Above-described embodiment only is used for illustrating the utility model, does not limit to category of the present utility model.The length that the length of first radiant body 341, second radiant body 342 and first metal arm of being mentioned in the literary composition 343 is not limited to fix, visual user's demand and adjusting.The matching component 39 and second passive block 56 can be made of inductance, electric capacity or resistance, are not limited to those assemblies.Second antenna 54 can be a Wi-Fi antenna, a Wi-Max antenna, a UWB antenna, a gps antenna or a DVB-H antenna.Above-mentioned parasitic element 52, second antenna 54 and second passive block 56 only are used as example explanation of the present utility model, and those assemblies are not to be necessary restrictive condition of the present utility model.Parasitic element 52, second antenna 54 and second passive block 56 are for can omit assembly.In addition, match circuit 31, match circuit 61 and match circuit 71 couple position difference (first length L 1 and second length L 2 are for adjusting), only be used as example explanation of the present utility model, be not limited thereto.
The above only is a preferred embodiment of the present utility model, and all equalizations of doing according to the utility model change and modify, and all should belong to covering scope of the present utility model.
Claims (19)
1. the antenna of an adjustable impedance coupling is characterized in that, comprising:
One substrate, this substrate have a first side and a second side, comprise a short dot and an earth point on this first side;
One radiation assembly is arranged on this first side, and this radiation assembly comprises:
One first radiant body is roughly parallel to this first side;
One second radiant body is roughly parallel to this first side and towards extending with the rightabout of this first radiant body; And
One first metal arm is approximately perpendicular to this first side, comprises that one first end is coupled to the junction of this first radiant body and this second radiant body, and one second end;
One feed-in assembly is coupled between this second end and this earth point of this first metal arm;
One coupling assembling comprises that one first end is coupled to this second end of this first metal arm, and one second end is coupled to this short dot; And
One match circuit is arranged between this first side of this radiation assembly and this substrate, comprising:
One second metal arm is extended by this first metal arm; And
One matching component is coupled to this second metal arm, is used to provide an impedance.
2. antenna according to claim 1 is characterized in that this matching component is made of passive block.
3. antenna according to claim 1 is characterized in that, this matching component is inductance, electric capacity or resistance.
4. antenna according to claim 1 is characterized in that, this matching component is coupled between this second metal arm and this coupling assembling.
5. antenna according to claim 1 is characterized in that, this matching component is coupled between this second metal arm and this first side.
6. antenna according to claim 1 is characterized in that, this matching component is coupled between this second metal arm and this first radiant body.
7. antenna according to claim 1 is characterized in that, this matching component is coupled between this second metal arm and this second radiant body.
8. antenna according to claim 1 is characterized in that, this substrate is made of dielectric material or magnetic material.
9. antenna according to claim 1 is characterized in that, this substrate is electrically connected at one and systematically holds.
10. antenna according to claim 1 is characterized in that, this radiation assembly and this coupling assembling are to be made by a single sheet metal.
11. antenna according to claim 1 is characterized in that, the length of this first radiant body is greater than the length of this second radiant body.
12. antenna according to claim 1 is characterized in that, the length sum of the length of this first radiant body and this first metal arm be approximately one first resonance mode that this antenna produces signal wavelength 1/4th.
13. antenna according to claim 1 is characterized in that, the length sum of the length of this second radiant body and this first metal arm be approximately one second resonance mode that this antenna produces signal wavelength 1/4th.
14. antenna according to claim 1 is characterized in that, the tail end of this first radiant body comprises a bending.
15. antenna according to claim 1 is characterized in that, the tail end of this second radiant body comprises a bending.
16. antenna according to claim 1 is characterized in that, also comprises a parasitic element, is formed between this substrate and this radiation assembly, is used for expanding frequency range.
17. antenna according to claim 1 is characterized in that, is located in the wireless communication apparatus.
18. antenna according to claim 17 is characterized in that, this wireless communication apparatus is a notebook.
19. antenna according to claim 17 is characterized in that, this wireless communication apparatus is a mobile phone or a personal digital assistant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201647518U CN200994001Y (en) | 2006-12-27 | 2006-12-27 | Adjustable impedance matching antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201647518U CN200994001Y (en) | 2006-12-27 | 2006-12-27 | Adjustable impedance matching antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200994001Y true CN200994001Y (en) | 2007-12-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201647518U Expired - Lifetime CN200994001Y (en) | 2006-12-27 | 2006-12-27 | Adjustable impedance matching antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200994001Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780076A (en) * | 2012-07-10 | 2012-11-14 | 苏州佳世达电通有限公司 | Multi-frequency antenna and electronic device |
| CN103579745A (en) * | 2012-07-27 | 2014-02-12 | Ls美创有限公司 | Internal antenna having wideband characteristic |
| CN105633549A (en) * | 2014-10-31 | 2016-06-01 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication equipment using same |
-
2006
- 2006-12-27 CN CNU2006201647518U patent/CN200994001Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780076A (en) * | 2012-07-10 | 2012-11-14 | 苏州佳世达电通有限公司 | Multi-frequency antenna and electronic device |
| CN103579745A (en) * | 2012-07-27 | 2014-02-12 | Ls美创有限公司 | Internal antenna having wideband characteristic |
| US9337547B2 (en) | 2012-07-27 | 2016-05-10 | Ls Mtron Ltd. | Internal antenna having wideband characteristic |
| CN103579745B (en) * | 2012-07-27 | 2016-09-14 | Ls美创有限公司 | There is the inside antenna of broadband character |
| CN105633549A (en) * | 2014-10-31 | 2016-06-01 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication equipment using same |
| CN105633549B (en) * | 2014-10-31 | 2020-06-19 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication equipment applying same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071219 |
|
| EXPY | Termination of patent right or utility model |