CN203026635U - Bluetooth antenna - Google Patents
Bluetooth antenna Download PDFInfo
- Publication number
- CN203026635U CN203026635U CN 201320020733 CN201320020733U CN203026635U CN 203026635 U CN203026635 U CN 203026635U CN 201320020733 CN201320020733 CN 201320020733 CN 201320020733 U CN201320020733 U CN 201320020733U CN 203026635 U CN203026635 U CN 203026635U
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Abstract
The utility model provides a Bluetooth antenna comprising a main antenna, a first tuned antenna and a second tuned antenna, wherein the main antenna and the first tuned antenna can generate a first tuned point, and the main antenna and the second tuned antenna can generate a second tuned point to generate a harmonic peak near the resonance centre of the main antenna so as to expand the bandwidth of the frequency band of the Bluetooth antenna.
Description
Technical field
The utility model relates to the Bluetooth technology field, relates in particular to a kind of Bluetooth antenna.
Background technology
bluetooth is the radiotechnics of a kind of support equipment short haul connection (being generally within 10m), can carry out the wireless messages exchange between equipment, its working frequency range is the free frequency range of the global communication of 2.4 ~ 2.483GHz, be widely used at present wireless device (as PDA, mobile phone, smart phone, cordless telephone), image processing facility (digital camera, printer, scanner), safety product (smart card, identification, bill management, safety inspection), consumption amusement (earphone, MP3, game), automobile product (GPS, ABS, dynamical system, air bag), household electrical appliance (television set, refrigerator, roaster, microwave oven, sound equipment), medical body-building, building, the fields such as toy.Bluetooth technology allow originally independently digital device can with other equipment networking exchange messages, this makes the application of Bluetooth technology openr.
In the application of Bluetooth technology. antenna is the Primary Component that affects bluetooth communications capability.Yet present blue tooth products is more and more frivolous, causes the distance of Bluetooth antenna and PCB circuit board very near, the bandwidth of the Bluetooth antenna relative narrower that becomes, and then reduced bluetooth communications capability.Please refer to Fig. 1 to Fig. 3, on the PCB of a 50mm * 50mm, one highly for the common PIFA antenna of 2mm-the 10dB bandwidth is 86MHz, and-the 6dB bandwidth also only has 157MHz.
Therefore, need a kind of new Bluetooth antenna, to avoid defects.
The utility model content
The purpose of this utility model is to provide a kind of Bluetooth antenna, can widen the bandwidth of Bluetooth antenna.
For addressing the above problem, the utility model provides a kind of Bluetooth antenna, comprising:
The main body antenna comprises the radiation arm that is arranged on PCB first edges of boards, is set in parallel in current feed department and grounding parts between radiation arm and PCB, and described grounding parts connects the ground of described PCB;
The first tuned antenna, an end arranges according to the radiation arm end of adjacent described current feed department one side in predefine interval, and the other end extends and connects the ground of described PCB along PCB second edges of boards of described PCB the first edges of boards and described current feed department one side;
The second tune antenna, an end connects the radiation arm end of described grounding parts one side, and the other end extends and is free end along PCB the 3rd edges of boards of described PCB the first edges of boards and described grounding parts one side.
Further, described predefine interval is less than 0.5mm.
Further, described main body antenna is IFA antenna or PIFA antenna, and described radiation arm is arranged in the plate face of described PCB, the top of PCB or the below of PCB.
Further, the development length of described the first tuned antenna on the PCB of described current feed department one side the second edges of boards direction be described main body antenna operation wavelength 1/4th.
Further, the development length of described second tune antenna on the PCB of described grounding parts one side the 3rd edges of boards direction depends on the size of the tuned frequency of described main body antenna and the first tuned antenna.
Compared with prior art, the Bluetooth antenna that the utility model provides, its main body antenna and the first tuned antenna can produce first tuning point, its main body antenna and second tune antenna can produce second tuning point, make near the of resonance center of main body antenna a resonance peak occur again, thereby reach the purpose of widening the Bluetooth antenna band bandwidth.
Description of drawings
Fig. 1 is the vertical view of a PIFA antenna structure of the prior art;
Fig. 2 is the front view of PIFA antenna structure shown in Figure 1;
Fig. 3 is the frequency characteristic figure of PIFA antenna emulation shown in Figure 1;
Fig. 4 is the front view of the Bluetooth antenna structure of the utility model embodiment one;
Fig. 5 is the vertical view of Bluetooth antenna structure shown in Figure 4;
Fig. 6 is the frequency characteristic figure of main body antenna and the first tuned antenna resonance emulation in Bluetooth antenna shown in Figure 4;
Fig. 7 is the frequency characteristic figure of main body antenna and second tune antenna resonance emulation in Bluetooth antenna shown in Figure 4;
Fig. 8 is the frequency characteristic figure of Bluetooth antenna emulation shown in Figure 4;
Fig. 9 is the front view of an IFA antenna structure of the prior art;
Figure 10 is the frequency characteristic figure of IFA antenna emulation shown in Figure 9;
Figure 11 is the front view of the Bluetooth antenna structure of the utility model embodiment two;
Figure 12 is the frequency characteristic figure of main body antenna and the first tuned antenna resonance emulation in Bluetooth antenna shown in Figure 11;
Figure 13 is the frequency characteristic figure of main body antenna and second tune antenna resonance emulation in Bluetooth antenna shown in Figure 11;
Figure 14 is the frequency characteristic figure of Bluetooth antenna emulation shown in Figure 11.
Embodiment
Core concept of the present utility model is to disclose a kind of Bluetooth antenna and Bluetooth antenna band expanding method, lay respectively the first tuned antenna and second tune antenna at the two ends of script Bluetooth antenna, effect by this two-stage structure, make near resonance center of Bluetooth antenna originally a resonance peak occur again, thereby reach the purpose of widening the Bluetooth antenna band bandwidth, mainly be applicable to the band expanding of inverted F shaped antenna.
For the purpose of this utility model, feature are become apparent, below in conjunction with accompanying drawing, embodiment of the present utility model is further described, yet the utility model can be realized with different forms, should not think just to be confined to described embodiment.
Embodiment one
Please refer to Fig. 4 and Fig. 5, the present embodiment provides a kind of Bluetooth antenna, comprises three sections antennas, is respectively main body antenna, the first tuned antenna 22 and second tune antenna 23.
In the present embodiment, the main body antenna is PIFA antenna (Planar Inverted F Antenna, planar inverted-F antenna), comprise and be arranged on a PCB(Printed Circuit Board, printed circuit board (PCB)) the plane radiation arm 21 of 20 first edges of boards, be set in parallel in current feed department 211 and grounding parts 210 between radiation arm 21 and PCB20, described grounding parts 210 connects the ground of described PCB20.The radiation arm 21 of the current feed department 211 of main body antenna, grounding parts 210 and complanation is looked from the side, as an English alphabet " F " that is placed upside down in the upper capitalization of PCB20.
In the present embodiment, the first tuned antenna 22 1 ends 221 arrange according to radiation arm 21 ends 212 of adjacent described current feed department 211 1 sides in predefine interval, and the other end 222 extends and connect the ground of described PCB20 along PCB20 second edges of boards of described PCB20 the first edges of boards and described current feed department 211 1 sides; Second tune antenna 23 1 ends connect radiation arm 21 ends of described grounding parts 210 1 sides, and the other end 230 extends and is free end along PCB20 the 3rd edges of boards of described PCB20 the first edges of boards and described grounding parts 210 1 sides.
Preferably, the described predefine interval between the first frequency-modulated antenna 22 and main body antenna 21 is less than 0.5mm.
Preferably, the development length h2 of described the first tuned antenna 22 on the PCB20 of described current feed department one side the second edges of boards direction be described main body antenna 21 operation wavelength 1/4th.
Preferably, the development length w3 of described second tune antenna 23 on the PCB20 of described grounding parts 210 1 sides the 3rd edges of boards direction depends on the size of the tuned frequency of described main body antenna 21 and the first tuned antenna 22.
In the present embodiment, the specification of PCB20 is 50mm * 50mm; Main body antenna 21 is arranged at the top of PCB20, the live width h1-h0 of its radiation arm 21 is 1mm, radiation arm 21 parts between current feed department 211 and grounding parts 210 are the opening frame-shaped construction, radiation arm 21 length w0 between current feed department 211 and the first frequency-modulated antenna 22 are 25mm, the long w1 of the opening frame-shaped construction between current feed department 211 and grounding parts 210 is 6mm, and wide h0 is 2mm; It is L-shaped that the first frequency-modulated antenna 22 is overlooked face, predefine interval d between radiation arm 21 ends 212 of one end (initiating terminal) 221 and described current feed department 211 1 sides is 0.2mm, the development length w2 of the first frequency-modulated antenna 22 on PCB20 the first edges of boards direction is 17.8mm, and the development length h2 on PCB20 the second edges of boards direction is 10mm; The second frequency-modulated antenna 23 is linear pattern, and the development length on PCB20 the first edges of boards direction is 0, and the development length w3 on PCB20 the 3rd edges of boards direction is 24mm.The live width of the first frequency-modulated antenna 22 and the second frequency-modulated antenna 23 is 1mm.In other embodiments, the first frequency-modulated antenna 22 and the second frequency-modulated antenna 23 can be also other shapes, and for example, corner is level and smooth turning, and on-right angle.
In the present embodiment, at first, the first tuned antenna 22 produces first resonance point with 21 effects of main body antenna, near 2.6GHz.Bandwidth as shown in Figure 6.Secondly, second tune antenna 23 produces second resonance point with 21 effects of main body antenna, about the 2.4GHz left and right, as shown in Figure 7.The Bluetooth antenna frequency band has been widened in last the first tuned antenna 22 and 23 liang of antennas of second tune antenna and 21 actings in conjunction of main body antenna, as shown in Figure 8, this Bluetooth antenna-the 10dB bandwidth is 339MHz, increase 253MHz than common PIFA antenna (please refer to shown in Fig. 1 to 3), and-the 6dB bandwidth is 501MHz, increases 344MHz than common PIFA antenna (please refer to shown in Fig. 1 to 3).
This shows, the Bluetooth antenna that the utility model provides, its main body antenna and the first tuned antenna can produce first tuning point, its main body antenna and second tune antenna can produce second tuning point, make near the of resonance center of main body antenna a resonance peak occur again, thereby reach the purpose of widening the Bluetooth antenna band bandwidth.
Need to prove, its essence of main body antenna of the present utility model is existing Bluetooth antenna, therefore its shape be not limited only to Fig. 1,2 and Fig. 4,5 in the shape of restriction, the shape of its radiation arm can be the shape that has the PIFA antenna that arranges in blue tooth products now, such as swirl type etc., the first tuned antenna and second tune antenna are arranged on outside PIFA antenna both sides and get final product, namely the first tuned antenna is arranged on the PIFA antenna outermost of current feed department side, and the second tune antenna is arranged on the PIFA antenna outermost of grounding parts side.Regulate the development length of the first tuned antenna and second tune antenna, can regulate its bandwidth and resonance point of resonance peak separately, thereby the different effects of widening is arranged.
The utility model also provides a kind of PIFA Bluetooth antenna band expanding method, comprising:
One PIFA antenna to be widened is provided, and described PIFA antenna comprises the radiation arm that is arranged on PCB first edges of boards, is set in parallel in current feed department and grounding parts between radiation arm and PCB, and described grounding parts connects the ground of described PCB;
Radiation arm end according to adjacent described current feed department one side in predefine interval is laid the first tuned antenna, and the described first tuned antenna other end extends and connect the ground of described PCB along PCB second edges of boards of described PCB the first edges of boards and described current feed department one side;
Connect the second tune antenna at the radiation arm end of described grounding parts one side, the described second tune antenna other end extends and is free end along PCB the 3rd edges of boards of described PCB the first edges of boards and described grounding parts one side.
Wherein, described PIFA antenna can be arranged on top or the below of PCB.
Preferably, described predefine interval is less than 0.5mm; The development length of described the first tuned antenna on the PCB of described current feed department one side the second edges of boards direction be described Bluetooth antenna operation wavelength 1/4th; The development length of described second tune antenna on the PCB of described grounding parts one side the 3rd edges of boards direction depends on the size of the tuned frequency of described main body antenna and the first tuned antenna.
Need to prove, in the PIFA Bluetooth antenna band expanding method that the present embodiment provides, can be after setting the first tuned antenna, namely make after the resonance frequency of the first tuned antenna and PIFA antenna to be widened drops on the bluetooth frequency range, when laying the second tune antenna, can adjust the length of second tune antenna by the measurement bandwidth bandwidth, make the first tuned antenna and second tune antenna and the coefficient band bandwidth of PIFA antenna to be widened meet the demands; Also can reverse operating, realize the purpose of band expanding; Can also regulate simultaneously the development length of the first tuned antenna and second tune antenna, can regulate its bandwidth and resonance point of resonance peak separately, thereby the different effects of widening is arranged.
In sum, the PIFA Bluetooth antenna band expanding method that the present embodiment provides, lay respectively the first tuned antenna and second tune antenna at the two ends of script PIFA Bluetooth antenna, effect by this two-stage structure, make near the of resonance center of Bluetooth antenna originally a resonance peak occur again, thereby reach the purpose of widening the Bluetooth antenna band bandwidth.
Embodiment two
IFA antenna (Inverted F Antenna, inverse-F antenna) is one of another antenna in blue tooth products commonly used, comprises radiation arm, is set in parallel in current feed department and grounding parts between radiation arm and PCB.Present blue tooth products is more and more frivolous, and the IFA antenna applications is in the blue tooth products time, becomes equally very near with the distance of PCB circuit board, thereby its bandwidth relative narrower that becomes, and has reduced bluetooth communications capability.Please refer to Fig. 9 and Figure 10, a kind of common IFA antenna 31 of the prior art is arranged on the plate face interior (being that PCB30 and IFA antenna are in same plane) of the PCB30 of a 50mm * 50mm, its-the 10dB bandwidth is 260MHz ,-6dB bandwidth is 451MHz.
Please refer to Figure 11, the present embodiment provides a kind of Bluetooth antenna, comprises three sections antennas, is respectively main body antenna, the first tuned antenna 32 and second tune antenna 33.
In the present embodiment, the main body antenna is the IFA antenna, comprises the radiation arm 31 that is arranged on PCB30 first edges of boards, is set in parallel in current feed department 311 and grounding parts 310 between radiation arm 31 and PCB30, and described grounding parts 310 connects the ground of described PCB30; The first tuned antenna 32 1 ends 321 arrange according to radiation arm 31 ends 312 of adjacent described current feed department 311 1 sides in predefine interval, and the other end 322 extends and connect the ground of described PCB30 along PCB30 second edges of boards of described PCB30 the first edges of boards and described current feed department 311 1 sides; Second tune antenna 33 1 ends 331 connect radiation arm 31 ends of described grounding parts 310 1 sides, and the other end 330 extends and is free end (freely stretching) along PCB30 the 3rd edges of boards of described PCB30 the first edges of boards and described grounding parts 310 1 sides.In the present embodiment, the first frequency-modulated antenna 32 and the second frequency-modulated antenna 33 are " L " shape.In other embodiments, the first frequency-modulated antenna 32 and the second frequency-modulated antenna 33 can be also other shapes, and for example, corner is level and smooth turning, and on-right angle.
Preferably, the described predefine interval D between the first frequency-modulated antenna 32 and main body antenna 31 is less than 0.5mm.
Preferably, the development length H of described the first tuned antenna 32 on the PCB30 of described current feed department one side the second edges of boards direction be described main body antenna 31 operation wavelength 1/4th.
Preferably, the development length of described second tune antenna 33 on the PCB30 of described grounding parts 310 1 sides the 3rd edges of boards direction depends on the size of the tuned frequency of described main body antenna 31 and the first tuned antenna 32.
In the present embodiment, at first, the first tuned antenna 32 produces first resonance point with 31 effects of main body antenna, near 2.46GHz.Bandwidth as shown in figure 12.Secondly, second tune antenna 33 produces second resonance point with 31 effects of main body antenna, about the 2.44GHz left and right, as shown in figure 13.The Bluetooth antenna frequency band has been widened in last the first tuned antenna 32 and 33 liang of antennas of second tune antenna and 31 actings in conjunction of main body antenna, as shown in figure 14, this Bluetooth antenna-the 10dB bandwidth is 364MHz, increase 105MHz than common IFA antenna (please refer to shown in Fig. 9 to 10), and-the 6dB bandwidth is 500MHz, increases 50MHz than common IFA antenna (please refer to shown in Fig. 9 to 10).。Regulate the development length of the first tuned antenna 32 and second tune antenna 33, can regulate its bandwidth and resonance point of resonance peak separately, thereby the different effects of widening is arranged.
This shows, the Bluetooth antenna that the utility model provides, its main body antenna and the first tuned antenna can produce first tuning point, its main body antenna and second tune antenna can produce second tuning point, make near the of resonance center of main body antenna a resonance peak occur again, thereby reach the purpose of widening the Bluetooth antenna band bandwidth.
Need to prove, its essence of main body antenna of the present utility model is existing Bluetooth antenna, therefore its shape is not limited only to the shape that limits in Fig. 9 and Figure 11, the shape of its radiation arm can be the shape that has the IFA antenna that arranges in blue tooth products now, such as swirl type etc., the first tuned antenna and second tune antenna are arranged on outside IFA antenna both sides and get final product, namely the first tuned antenna is arranged on the IFA antenna outermost of current feed department side, and the second tune antenna is arranged on the IFA antenna outermost of grounding parts side.
The utility model also provides a kind of IFA Bluetooth antenna band expanding method, comprising:
One IFA antenna to be widened is provided, and described IFA antenna comprises the radiation arm that is arranged on PCB first edges of boards, is set in parallel in current feed department and grounding parts between radiation arm and PCB, and described grounding parts connects the ground of described PCB;
Radiation arm end according to adjacent described current feed department one side in predefine interval is laid the first tuned antenna, and the described first tuned antenna other end extends and connect the ground of described PCB along PCB second edges of boards of described PCB the first edges of boards and described current feed department one side;
Connect the second tune antenna at the radiation arm end of described grounding parts one side, the described second tune antenna other end extends and is free end along PCB the 3rd edges of boards of described PCB the first edges of boards and described grounding parts one side.
Preferably, between described predefine d every less than 0.5mm; The development length of described the first tuned antenna on the PCB of described current feed department one side the second edges of boards direction be described Bluetooth antenna operation wavelength 1/4th; The development length of described second tune antenna on the PCB of described grounding parts one side the 3rd edges of boards direction depends on the size of the tuned frequency of described main body antenna and the first tuned antenna.
Need to prove, in the IFA Bluetooth antenna band expanding method that the present embodiment provides, can be after setting the first tuned antenna, namely make after the resonance frequency of the first tuned antenna and PIFA antenna to be widened drops on the bluetooth frequency range, when laying the second tune antenna, can adjust the length of second tune antenna by the measurement bandwidth bandwidth, make the first tuned antenna and second tune antenna and the coefficient band bandwidth of PIFA antenna to be widened meet the demands; Also can reverse operating, realize the purpose of band expanding; Can also regulate simultaneously the development length of the first tuned antenna and second tune antenna, can regulate its bandwidth and resonance point of resonance peak separately, thereby the different effects of widening is arranged.
In sum, the IFA Bluetooth antenna band expanding method that the present embodiment provides, lay respectively the first tuned antenna and second tune antenna at the two ends of script IFA Bluetooth antenna, effect by this two-stage structure, make near the of resonance center of Bluetooth antenna originally a resonance peak occur again, thereby reach the purpose of widening the Bluetooth antenna band bandwidth.
Obviously, those skilled in the art can carry out various changes and modification and not break away from spirit and scope of the present utility model utility model.Like this, if within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model also is intended to comprise these changes and modification interior.
Claims (5)
1. a Bluetooth antenna, is characterized in that, comprising:
The main body antenna comprises the radiation arm that is arranged on PCB first edges of boards, is set in parallel in current feed department and grounding parts between radiation arm and PCB, and described grounding parts connects the ground of described PCB;
The first tuned antenna, an end arranges according to the radiation arm end of adjacent described current feed department one side in predefine interval, and the other end extends and connects the ground of described PCB along PCB second edges of boards of described PCB the first edges of boards and described current feed department one side;
The second tune antenna, an end connects the radiation arm end of described grounding parts one side, and the other end extends and is free end along PCB the 3rd edges of boards of described PCB the first edges of boards and described grounding parts one side.
2. Bluetooth antenna as claimed in claim 1, is characterized in that, described predefine interval is less than 0.5mm.
3. Bluetooth antenna as claimed in claim 1, is characterized in that, described main body antenna is IFA antenna or PIFA antenna, and described radiation arm is arranged in the plate face of described PCB, the top of PCB or the below of PCB.
4. Bluetooth antenna as claimed in claim 1, is characterized in that, the development length of described the first tuned antenna on the PCB of described current feed department one side the second edges of boards direction be described main body antenna operation wavelength 1/4th.
5. Bluetooth antenna as claimed in claim 1, is characterized in that, the development length of described second tune antenna on the PCB of described grounding parts one side the 3rd edges of boards direction depends on the size of the tuned frequency of described main body antenna and the first tuned antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320020733 CN203026635U (en) | 2013-01-15 | 2013-01-15 | Bluetooth antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320020733 CN203026635U (en) | 2013-01-15 | 2013-01-15 | Bluetooth antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203026635U true CN203026635U (en) | 2013-06-26 |
Family
ID=48650589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320020733 Withdrawn - After Issue CN203026635U (en) | 2013-01-15 | 2013-01-15 | Bluetooth antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203026635U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066378A (en) * | 2013-01-15 | 2013-04-24 | 青岛歌尔声学科技有限公司 | Bluetooth antenna and Bluetooth antenna frequency band broadening method |
| CN104659471A (en) * | 2013-11-21 | 2015-05-27 | 深圳富泰宏精密工业有限公司 | Inverted F-shaped antenna structure and portable electronic device provided with antenna structure |
| CN112189308A (en) * | 2018-05-22 | 2021-01-05 | 普卢姆设计有限公司 | Tunable antenna system with electronically reconfigurable and mechanically identical antennas for bluetooth and Wi-Fi bands |
-
2013
- 2013-01-15 CN CN 201320020733 patent/CN203026635U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066378A (en) * | 2013-01-15 | 2013-04-24 | 青岛歌尔声学科技有限公司 | Bluetooth antenna and Bluetooth antenna frequency band broadening method |
| CN103066378B (en) * | 2013-01-15 | 2015-06-03 | 青岛歌尔声学科技有限公司 | Bluetooth antenna and Bluetooth antenna frequency band broadening method |
| CN104659471A (en) * | 2013-11-21 | 2015-05-27 | 深圳富泰宏精密工业有限公司 | Inverted F-shaped antenna structure and portable electronic device provided with antenna structure |
| US10218066B2 (en) | 2013-11-21 | 2019-02-26 | Chiun Mai Communication Systems, Inc. | Antenna structure and wireless communication device using the same |
| CN112189308A (en) * | 2018-05-22 | 2021-01-05 | 普卢姆设计有限公司 | Tunable antenna system with electronically reconfigurable and mechanically identical antennas for bluetooth and Wi-Fi bands |
| CN112189308B (en) * | 2018-05-22 | 2022-04-29 | 普卢姆设计有限公司 | Method for operating a radio system, radio system and wireless access point |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130626 Effective date of abandoning: 20150603 |
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| RGAV | Abandon patent right to avoid regrant |