CN201122655Y - Miniature Bluetooth plane inverse F-shaped antenna - Google Patents
Miniature Bluetooth plane inverse F-shaped antenna Download PDFInfo
- Publication number
- CN201122655Y CN201122655Y CNU2007201987410U CN200720198741U CN201122655Y CN 201122655 Y CN201122655 Y CN 201122655Y CN U2007201987410 U CNU2007201987410 U CN U2007201987410U CN 200720198741 U CN200720198741 U CN 200720198741U CN 201122655 Y CN201122655 Y CN 201122655Y
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- antenna
- bluetooth
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- pifa
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Abstract
The utility model provides a novel small type Bluetooth planar inverse F antenna, which comprises a cross type groove arranged on a radiation patch of a PIFA Bluetooth antenna to extend the current patch on the patch surface, and reduce the resonance frequency of the antenna. Because the groove not only can reduce the resonance frequency of the antenna, but also can ensure a specific gain and bandwidth, and also the circular polarization and dual frequency dual polarization characteristics is easy to be realized. The utility model can be improved on a traditional microstrip antenna to form a simple PIFA Bluetooth antenna; the opening of the groove on the radiation patch is easy to be realized, and the processing is simple; the volume of the entire antenna can be effectively reduced, and the occupied space inside the mobile phone can be reduced. The utility model further realize the miniaturization of the Bluetooth PIFA antenna, simultaneously, the integral performance of the antenna is not affected, also the material cost of the antenna can be properly reduced, and the volume and weight can be reduced as well, and the occupied space of the antenna inside the mobile phone can be reduced.
Description
Technical field
The utility model relates to the mobile communication technology field, relates in particular to small Bluetooth planar inverted-F antenna technology.
Background technology
The transmission mode of bluetooth is based on a piconet (Piconet), can have the slave unit (Slave) and an aggressive device (Master) of seven bluetooths in piconet simultaneously, the frequency hop sequences of all slave units in same piconet (Frequency Hopping Sequence) must be worked in coordination with aggressive device.Under the basis of piconet, can allow single-point to single-point (Point to Point), single-point to multiple spot (Point to Multipoint) and several piconets multiple transmission mode of link mutually.In above these patterns, no matter be active or the slave unit in the piconet, because all need with net in change the position at any time driven or aggressive device get in touch, so these install employed aerial radiation field pattern must be approximate isotropic, transmit or receive if use the too high antenna of directive property to do, will cause two signals between the blue-tooth device on some relative angle, can't normally transmit.Present modal Bluetooth antenna kind includes dipole antenna (Dipole Antenna), PIFA antenna (planar inverted-F antenna, Planar Inverted FAntenna is hereinafter to be referred as PIFA) and microminiature ceramic antenna (Ceramic Antenna) etc.Because these antenna has approximate isotropic radiation pattern and advantage simple in structure, that cost of manufacture is low, so be fit to very much the use of blue-tooth device.
Bluetooth PIFA antenna is identical and name with its side structure and the English alphabet F outward appearance of turning one's coat, its working length has only 1/4th operative wavelengths, and in its structure, included grounding metal plane, can reduce susceptibility, so be suitable for use in very much in the bluetooth module device to grounding metal plane in the module.On the other hand because the PIFA antenna only need utilize metallic conductor to cooperate suitable feed-in and the antenna short circuit position to ground plane, so its cost of manufacture is low, and can be directly and the PCB circuit board weld together.The metallic conductor of bluetooth PIFA antenna can use wire or sheet, is welded on the purpose that reaches conceal antenna on the circuit board if then can be designed to the SMD assembly with Metal Flake making.With grounding metal plane do not produce short circuit for the support metal sheet this moment; the medium that can add insulation usually between sheet metal and ground plane is if the higher insulation material of working medium constant (Dielectric Constant) can also be dwindled the size of Bluetooth antenna.
When adopting bluetooth PIFA antenna, how to prolong the current path on paster surface, thereby reduce the resonance frequency of antenna, and will guarantee certain gain and bandwidth, realize circular polarization and dual-band and dual-polarization characteristic, and realize that bluetooth PIFA antenna miniaturization is a technical barrier all the time.
The utility model content
The technical problems to be solved in the utility model provides a kind of novel small Bluetooth planar inverted-F antenna, under the situation of the overall performance that does not influence antenna, can reach the current path that prolongs the paster surface, thereby reduces the purpose of the resonance frequency of antenna.
To achieve these goals, the utility model has adopted following technical scheme:
The utility model comprises short dot, distributing point, radiation patch, in radiation patch central authorities a cross bath is set.
Described cross bath forms two orthogonal modess.By adjusting the length and the antenna feed point position of cross bath, can make this two mode degeneracies, amplitudes such as formation, and have phase quadrature, thus realize circular polarization.
The utility model is opened a cross bath on the radiation patch of bluetooth PIFA antenna, with the current path on prolongation paster surface, thus the resonance frequency of reduction antenna.Because fluting not only can reduce the resonance frequency of antenna, but also can guarantee certain gain and bandwidth, also be easy to realize circular polarization and dual-band and dual-polarization characteristic.The utility model can improve on traditional microstrip antenna, forms simple PIFA Bluetooth antenna; Fluting also realizes that than being easier to processing is simple on radiation patch; Can effectively dwindle the volume of entire antenna, thereby reduce taking the mobile phone space.The utility model does not influence the overall performance of antenna again when further realizing bluetooth PIFA antenna miniaturization, all right suitable minimizing antenna material cost, and its volume, and weight reduces antenna taking the mobile phone space.
Description of drawings
The vertical view of Fig. 1 prior art bluetooth PIFA antenna
Have the vertical view of the bluetooth PIFA antenna of cross bath in the middle of Fig. 2 the utility model
Embodiment
As shown in Figure 1, the radiating surface of bluetooth PIFA antenna is the radiation patch 3 of an ordinary rectangular in the prior art, and the length of side is L, highly is H (height H of saying is the height of radiation patch distance P CB plate) here, and relative dielectric constant is the dielectric constant of air: 1.
As shown in Figure 2, the utility model comprises short dot 1, distributing point 2, radiation patch 3, in radiation patch 3 central authorities a cross bath 4 is set.This cross fluting 4 has changed the current direction of radiation patch, crooked current path, thus reduced the resonance frequency of antenna.
The length and the width of two arms that can be by adjusting cross bath 4 during design effectively reduce resonance frequency, learn that by experiment cross bath 4 is opened longly more, and resonance frequency is low more; The change of translot length is than the easier resonance frequency that influences antenna of change of pod length; The width of groove is also influential to resonance frequency, but influence is little.
Claims (4)
1, a kind of small Bluetooth planar inverted-F antenna comprises short dot (1), distributing point (2), radiation patch (3), it is characterized in that central authorities are provided with a cross bath (4) in radiation patch (3).
2, small Bluetooth planar inverted-F antenna as claimed in claim 1 is characterized in that, described cross bath (4) forms two orthogonal modess.
3, small Bluetooth planar inverted-F antenna as claimed in claim 2 is characterized in that, by adjusting the length and distributing point (2) position of cross bath (4), can make described two orthogonal modes degeneracys, amplitudes such as formation.
4, small Bluetooth planar inverted-F antenna as claimed in claim 2 is characterized in that, described two orthogonal modess have phase quadrature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201987410U CN201122655Y (en) | 2007-11-30 | 2007-11-30 | Miniature Bluetooth plane inverse F-shaped antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201987410U CN201122655Y (en) | 2007-11-30 | 2007-11-30 | Miniature Bluetooth plane inverse F-shaped antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201122655Y true CN201122655Y (en) | 2008-09-24 |
Family
ID=40009895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201987410U Expired - Fee Related CN201122655Y (en) | 2007-11-30 | 2007-11-30 | Miniature Bluetooth plane inverse F-shaped antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201122655Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012071967A1 (en) * | 2010-12-01 | 2012-06-07 | 惠州Tcl移动通信有限公司 | Penta-band internal antenna and mobile communication terminal thereof |
| TWI495277B (en) * | 2013-09-14 | 2015-08-01 | Univ Southern Taiwan Sci & Tec | Multi-input multi-output antenna for wireless transceiver |
-
2007
- 2007-11-30 CN CNU2007201987410U patent/CN201122655Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012071967A1 (en) * | 2010-12-01 | 2012-06-07 | 惠州Tcl移动通信有限公司 | Penta-band internal antenna and mobile communication terminal thereof |
| TWI495277B (en) * | 2013-09-14 | 2015-08-01 | Univ Southern Taiwan Sci & Tec | Multi-input multi-output antenna for wireless transceiver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080924 Termination date: 20121130 |