CN102800934B - The equipment of bluetooth module and application bluetooth module - Google Patents

Abstract

A bluetooth module includes a link management unit, a link control unit and an antenna, the antenna includes a dielectric substrate, a first metal sheet and a second metal sheet, the first and second feeders are arranged around the first metal sheet, and the second metal sheet is surrounded by The sheet is provided with the third and fourth feeder lines, the first and second feeder lines are fed into the first metal sheet through coupling, the third and fourth feeder lines are fed into the second metal sheet through coupling, and the first metal sheet is hollowed out with asymmetric The first and second micro-groove structures are used to form the first metal wiring on the first metal sheet, and the asymmetric third and fourth micro-groove structures are hollowed out on the second metal sheet to form the second metal wiring on the second metal sheet. One feeder is electrically connected to the third feeder, the second feeder is electrically connected to the fourth feeder, and the antenna is preset with a space for embedding electronic components. The power consumption of the bluetooth module is reduced, and the design of the bluetooth module is simplified. The present invention also provides a device using the above bluetooth module.

Description

Bluetooth module and equipment using the Bluetooth module

technical field

The invention relates to a bluetooth module and equipment using the bluetooth module.

Background technique

Bluetooth technology is an open global specification for wireless data and voice communications. It is based on low-cost short-range wireless connections and establishes a special connection for fixed and mobile device communication environments. Bluetooth works in the global 2.4GHz ISM (ie industry, science, medicine) frequency band. The data rate of Bluetooth is 1Mb/s. Time-division duplex transmission scheme is used to realize full-duplex transmission, that is, using IEEE802.15 protocol.

At the same time, with the complexity of modern electronic systems, the wireless access of Bluetooth technology is becoming more and more important in various devices. The necessary element for wireless access is the antenna. However, traditional antennas are mainly designed based on the radiation principle of electric monopoles or dipoles, such as the most commonly used planar inverted F antenna (PIFA). The radiation operating frequency of the antenna is directly related to the size of the antenna, and the bandwidth is directly related to the area of the antenna, so that the design of the antenna usually requires a physical length of half a wavelength. In some more complex electronic systems, the antenna needs to work in multiple modes, and an additional impedance matching network design is required before feeding into the antenna. However, the impedance matching network additionally increases the feeder design of the electronic system and increases the area of the radio frequency system. At the same time, the matching network also introduces a lot of energy loss, which is difficult to meet the design requirements of low power consumption.

Contents of the invention

Based on this, a bluetooth module with low power consumption and simplified design program is provided.

The present invention also provides a bluetooth device using the above bluetooth module.

A bluetooth module includes a link management unit, a link control unit, and an antenna. The antenna includes a dielectric substrate, a first metal sheet and a second metal sheet attached to the opposite surfaces of the dielectric substrate, and the first metal sheet is surrounded by The first feeder, the second feeder, the third feeder and the fourth feeder are arranged around the second metal sheet, and the first feeder and the second feeder are both fed into the first metal sheet by coupling, and the third feeder and the fourth feeder are fed into the second metal sheet through coupling, and the first metal sheet is hollowed out with an asymmetric first micro-groove structure and a second micro-groove structure to form a first metal trace on the first metal sheet. line, the second metal sheet is hollowed out with an asymmetrical third micro-groove structure and a fourth micro-groove structure to form a second metal wiring on the second metal sheet, the first feeder is electrically connected to the third feeder, and the The second feeder is electrically connected to the fourth feeder, and the antenna is preset with a space for embedding electronic components.

Further, the space is provided in at least one of the five positions of the first feeder line, the second feeder line, between the first feeder line and the first metal sheet, between the second feeder line and the first metal sheet, and the first metal sheet .

Further, the space is provided in at least one of the five positions of the third feeder line, the fourth feeder line, between the third feeder line and the second metal sheet, between the fourth feeder line and the second metal sheet, and the second metal sheet .

Further, the space is provided on the first metal trace on the first metal sheet, or the space is provided on the first micro-groove structure and/or the second micro-groove structure.

Further, the space is provided on the second metal trace on the second metal sheet, or the space is provided on the third microgroove structure and/or the fourth microgroove structure.

Further, the electronic components are inductive electronic components, capacitive electronic components or resistors.

Further, the space is a pad formed on the antenna.

Further, the range of the inductance value of the inductive electronic component is between 0-5uH.

Further, the range of the capacitance value of the capacitive electronic element is between 0-2pF.

A device using the above bluetooth module, the device also has a PCB board, and the antenna is connected to the PCB board.

Compared with the existing bluetooth module, it has the following beneficial effects: by setting a space for embedding electronic components on the antenna of the bluetooth module, the performance of the antenna can be fine-tuned by changing the performance of the embedded electronic components, and the design meets the adaptability and The antenna required for versatility can realize wireless access methods such as WIFI to share one antenna, which simplifies the design procedure of Bluetooth devices. In addition, both sides of the dielectric substrate are provided with metal sheets, making full use of the space area of the Bluetooth antenna. In this environment, the Bluetooth antenna can work at a lower operating frequency, meeting the requirements of antenna miniaturization, low operating frequency, and broadband multi-mode

Description of drawings

Fig. 1 is the block diagram of an embodiment of bluetooth module of the present invention;

Fig. 2 is a perspective view of the first embodiment of the antenna shown in Fig. 1;

Fig. 3 is another perspective view of Fig. 2;

FIG. 4 is a schematic structural diagram of the second embodiment of the antenna of the present invention;

FIG. 5 is a schematic structural diagram of a third embodiment of the antenna of the present invention;

Figure 6a is a schematic diagram of a complementary split resonant ring structure;

Figure 6b shows a schematic diagram of a complementary helix structure;

Figure 6c shows a schematic diagram of an open helical ring structure;

Figure 6d shows a schematic diagram of a double-opened helical ring structure;

Figure 6e is a schematic diagram of a complementary bend line structure;

Fig. 7a is a schematic diagram of the geometric shape derivation of the complementary split resonator structure shown in Fig. 6a;

Fig. 7b is a schematic diagram of the extended derivation of the complementary split resonant ring structure shown in Fig. 6a;

Fig. 8a is a composite structural schematic diagram of three complementary split resonant ring structures shown in Fig. 6a;

Fig. 8b is a composite schematic diagram of two complementary split resonant ring structures shown in Fig. 6a and a complementary helical wire structure shown in Fig. 6b;

FIG. 9 is a schematic structural diagram of four complementary split ring structures shown in FIG. 6a after they are arrayed.

detailed description

Please refer to FIG. 1 , the Bluetooth module 10 includes a link management unit 98 , a link control unit 99 and an antenna 100 . The link management unit 98 and the link control unit 99 are used to manage security, link establishment and control respectively. The link management unit 98 can talk to the link management unit of another bluetooth module device based on the antenna 100 to exchange information. In addition, the link management unit 98 can also use some predefined link level commands to control the communication through the link management unit. device news.

As shown in Figures 2 and 3, the antenna 100 includes a dielectric substrate 1, a first metal sheet 4 and a second metal sheet 7 attached to the opposite surfaces of the dielectric substrate 1, and a first feeder is arranged around the first metal sheet 4. 2. The second feeder 3, the third feeder 8 and the fourth feeder 9 are arranged around the second metal sheet 7, and the first feeder 2 and the second feeder 3 are fed into the first metal sheet 4 through coupling, Both the third feeder 8 and the fourth feeder 9 are fed into the second metal sheet 7 through coupling, and the first metal sheet 4 is hollowed out with an asymmetrical first micro-groove structure 41 and a second micro-groove structure 42 to form the first metal trace 43 on the first metal sheet, and the second metal sheet 7 is hollowed out with an asymmetric third micro-groove structure 71 and a fourth micro-groove structure 72 to form a second metal line on the second metal sheet 7. Metal traces 73 , the first feeder 2 is electrically connected to the third feeder 8 , the second feeder 3 is electrically connected to the fourth feeder 9 , and the antenna 100 is preset with a space 6 for embedding electronic components. Arranging metal sheets on both sides of the same dielectric substrate is equivalent to increasing the physical length of the antenna (the actual length does not increase), so that a radio frequency antenna working at an extremely low operating frequency can be designed in a very small space. Solve the physical limitation of the antenna controlled space area when the traditional antenna works at low frequency.

The first feeder 2 and the third feeder 8 are electrically connected through the metallized through hole 10 opened on the dielectric substrate 1, and the second feeder 3 and the fourth feeder 9 are electrically connected through the metallized through hole opened on the dielectric substrate 1 20 electrical connections.

In FIGS. 2 to 5 , the hatched portion of the first metal sheet is the first metal trace, and the blank portion (hollowed-out portion) on the first metal sheet represents the first microgroove structure and the second microgroove structure. In addition, the first feeder and the second feeder are also indicated by hatching. Similarly, the hatched portion of the second metal sheet is the second metal trace, and the blank portion (hollowed-out portion) on the second metal sheet represents the third microgroove structure and the fourth microgroove structure. In addition, the third feeder and the fourth feeder are also indicated by hatching.

Fig. 2 is a perspective view of the antenna, and Fig. 2 is another perspective view thereof. Combining the two figures, it can be seen that the structures attached to the a surface and b surface of the dielectric substrate are the same. That is, the projections of the first feeder line, the second feeder line, and the first metal sheet on surface b coincide with the third feeder line, the fourth feeder line, and the second metal sheet respectively. Of course, this is only a preferred solution, and the structures of the surface a and the surface b can also be different according to needs.

Both the first feeder 2 and the second feeder 3 are arranged around the first metal sheet 4 to realize signal coupling. In addition, the first metal sheet 4 may or may not be in contact with the first feeder 2 and the second feeder 3 . When the first metal sheet 4 is in contact with the first feeder 2, the inductive coupling between the first feeder 2 and the first metal sheet 4; when the first metal sheet 4 is not in contact with the first feeder 2, the first feeder 2 and the metal Capacitive coupling between slices 4. Similarly, when the first metal sheet 4 is in contact with the second feeder 3, the inductive coupling between the second feeder 3 and the first metal sheet 4; when the first metal sheet 4 is not in contact with the second feeder 3, the second feeder 3 Capacitively coupled with the first metal sheet 4.

Both the third feeder 8 and the fourth feeder 9 are arranged around the second metal sheet 7 to realize signal coupling. In addition, the second metal sheet 7 may or may not be in contact with the third feeder 8 and the fourth feeder 9 . When the second metal sheet 7 is in contact with the third feeder 8, the inductive coupling between the third feeder 8 and the second metal sheet 7; when the second metal sheet 7 is not in contact with the third feeder 8, the third feeder 8 and the metal Capacitive coupling between slices 7. Similarly, when the second metal sheet 7 is in contact with the fourth feeder 9, the third feeder 8 is inductively coupled with the second metal sheet 7; when the second metal sheet 7 is not in contact with the fourth feeder 9, the fourth feeder 9 and the first The two metal sheets 7 are capacitively coupled.

In the present invention, the first metal sheet and the second metal sheet on the two opposite surfaces of the dielectric substrate may or may not be connected. In the case that the first metal sheet is not connected to the second metal sheet, the first metal sheet and the second metal sheet are fed through capacitive coupling; in this case, by changing the thickness of the dielectric substrate, the The resonance between the first metal sheet and the second metal sheet is realized. When the first metal sheet is electrically connected to the second metal sheet (for example, connected in the form of a wire or a metallized through hole), the first metal sheet and the second metal sheet are fed by inductive coupling.

The first microgroove structure 41, the second microgroove structure 42, the third microgroove structure 71, and the fourth microgroove structure 72 in the present invention can all be the complementary split resonant ring structure shown in Figure 6a, Figure 6b One of the complementary helical wire structure shown in Figure 6c, the open spiral ring structure shown in Figure 6c, the double open spiral ring structure shown in Figure 6d, the complementary bent line structure shown in Figure 6e or through the preceding several The microgroove structure obtained by structure derivation, composite or array. There are two types of derivation, one is geometric shape derivation, and the other is extended derivation. The geometric shape derivation here refers to the derivation of structures with similar functions but different shapes, such as deriving from a box-like structure to a curve-like structure, triangle class structure and other different polygonal class structures; the extended derivative here is to open a new groove on the basis of Fig. 6a to Fig. 6e to form a new micro-groove structure; the complementary split resonator ring structure shown in Fig. 6a is For example, Fig. 7a is a schematic diagram of its geometric shape derivation, and Fig. 7b is a schematic diagram of its geometric shape derivation. Recombination here means that multiple microgroove structures in Figure 6a to Figure 6e are superimposed to form a new microgroove structure, as shown in Figure 8a, which is the composite of three complementary split resonator ring structures shown in Figure 6a Schematic diagram of the structure; as shown in FIG. 8b, it is a schematic structural diagram of two complementary split ring structures shown in FIG. 6a and the complementary helical wire structure shown in FIG. 6b. The array here refers to a plurality of micro-groove structures shown in Figure 6a to Figure 6e arrayed on the same metal sheet to form an integral micro-groove structure, as shown in Figure 9, which is a plurality of complementary micro-groove structures as shown in Figure 6a Schematic diagram of the structure of the type split resonator ring structure after arraying. The present invention will be described below by taking the split helical ring structure shown in FIG. 6c as an example.

We know that antennas with different polarization modes can be obtained by changing the feeding position of the feeder.

In the present invention, the space 6 is set between the first feeder 2, the second feeder 3, between the first feeder 2 and the first metal sheet 4, between the second feeder 3 and the first metal sheet 4, and the first metal sheet 4 at least one of these five positions. The space 6 is also arranged in the third feeder 8, the fourth feeder 9, between the third feeder 8 and the second metal sheet 7, between the fourth feeder 9 and the second metal sheet 7, and the second metal sheet 7. at least one of the positions. Preferably, the arrangement of multiple spaces 6 on the antenna is as shown in Figure 1 and Figure 2, that is, on the a-plane of the dielectric substrate, on the first feeder 2, the second feeder 3, the first feeder 2 and the first metal sheet 4, between the second feeder 3 and the first metal sheet 4, and at five positions of the first metal sheet 4, spaces 6 for embedding electronic components are provided. Wherein, the space on the first metal sheet 4 includes the space provided on the first metal wiring 43, and the space 6 provided on the first microgroove structure 41 and the second microgroove structure 42, and is arranged on the first microgroove structure 42. The spaces 6 on the trench structure 41 and the second micro-groove structure 42 are respectively connected to the edges of the first metal traces 43 on both sides. Similarly, on the b surface of the dielectric substrate, between the third feeder 8, the fourth feeder 9, between the third feeder 8 and the fourth metal sheet 4, between the fourth feeder 9 and the second metal sheet 7, and between the second metal The five positions of the sheet 7 are provided with spaces for embedding electronic components. Wherein, the space on the second metal sheet 7 includes the space arranged on the second metal wiring 73, the space arranged on the third microgroove structure 71 and the fourth microgroove structure 72, and the space arranged on the third microgroove structure The spaces 6 on the structure 71 and the fourth microgroove structure 72 are respectively connected to the edges of the second metal traces 73 on both sides.

The reserved position of the space on the antenna 100 is not limited to the above-mentioned several forms, and the space only needs to be set on the dual-polarized antenna. For example, spaces may also be provided on a dielectric substrate.

The electronic components of the present invention are inductive electronic components, capacitive electronic components or resistors. After adding such electronic components in the reserved space of the antenna, various performances of the antenna can be improved. And by adding electronic components with different parameters, the performance parameters of the antenna can be adjusted. Adding electronic components in the space can have the following situations. Since the b-side and a-side of the dielectric substrate are the same, only the a-side is used for illustration below:

(1) Add inductive electronic components in the space of the first feeder and the second feeder, and use the formula: It can be seen that the magnitude of the inductance is inversely proportional to the square of the operating frequency, so when the required operating frequency is a lower operating frequency, it can be realized by properly embedding inductance or inductive electronic components. The inductance value range of the added inductive electronic components is preferably between 0-5uH, because if the inductance value is too large, the alternating signal will be consumed by the inductive electronic components, thereby affecting the radiation efficiency of the antenna. Of course, it is also possible to add resistors to the spaces on the first feeder and the second feeder to improve the radiation resistance of the antenna. Of course, multiple spaces can also be set on the first feeder and the second feeder, some of which are embedded with resistors, and some of which are embedded with inductive electronic components, which not only realizes the adjustment of the working frequency, but also improves the radiation resistance of the antenna. Of course, according to other needs, electronic components can also be added only in some spaces, and other spaces are short-circuited with wires.

(2) Embedding capacitive electronic components in the space between the first feeder 2 and the first metal sheet 4 , and between the second feeder 3 and the first metal sheet 4 . Here, the signal coupling between the first feeder 2, the second feeder 3 and the first metal sheet 4 is adjusted by embedding capacitive electronic components, using the formula: It can be seen that the capacitance value is inversely proportional to the square of the operating frequency, so when the required operating frequency is a lower operating frequency, it can be realized by embedding appropriate capacitive electronic components. The capacitance value range of the added capacitive electronic components is usually between 0-2pF, but the embedded capacitance value may also exceed the range of 0-2pF as the operating frequency of the antenna changes. Of course, multiple spaces can also be preset between the first feeder 2 , the second feeder 3 and the first metal sheet 4 , and wires are used to short-circuit the spaces not connected with electronic components.

(3) Inductive electronic components and/or resistors are embedded in the space 6 on the first metal trace 43 of the first metal sheet. The purpose of embedding inductive electronic components here is to increase the inductance value of the internal resonant structure of the first metal sheet, thereby adjusting the resonant frequency and working bandwidth of the antenna; the purpose of embedding resistors here is to improve the radiation resistance of the antenna. As for embedding inductive electronic components or resistors, it depends on the needs. In addition, wires are used to short-circuit in the space where electronic components are not embedded.

(4) Embedding capacitive electronic components in the spaces 6 reserved on the first microgroove structure 41 and the second microgroove structure 42 . Embedding capacitive electronic components can change the resonance performance of the first metal sheet, and ultimately improve the Q value and resonance operating point of the antenna. As common knowledge, we know that the relationship between the passband BW, the resonant frequency wo, and the quality factor Q is: BW=wo/Q. This formula shows that the larger the Q, the narrower the passband, and the smaller the Q, the wider the passband. In addition: Q=wL/R=1/wRC, wherein, Q is the quality factor; w is the power frequency when the circuit resonates; L is the inductance; R is the resistance of the string; C is the capacitance, by Q=wL/R= The 1/wRC formula shows that Q and C are inversely proportional. Therefore, the Q value can be reduced by adding capacitive electronic components to widen the passband.

The dual-polarized antenna of the present invention can have the same structure before adding any components, only by adding different electronic components at different positions, and the parameters (inductance value, resistance value, capacitance value) of the electronic components are different. The performance parameters of different antennas achieve universality, so the production cost can be greatly reduced.

The space in the present invention may be a pad or a vacancy. The structure of the pads can refer to pads on common circuit boards. Of course, the design of its size will vary according to different needs.

In addition, in the present invention, the dielectric substrate can be made of ceramic material, polymer material, ferroelectric material, ferrite material or ferromagnetic material. Preferably, it is made of polymer materials, specifically polymer materials such as FR-4 and F4B.

In the present invention, the first metal sheet and the second metal sheet are copper sheets or silver sheets. Copper sheet is preferred, which is cheap and has good electrical conductivity.

In the present invention, the first feeder, the second feeder, the third feeder and the fourth feeder are made of the same material as the first metal sheet and the second metal sheet. Copper is preferred.

The "asymmetrical first micro-groove structure 41 and second micro-groove structure 42" in the present invention means that the first micro-groove structure 41 and the second micro-groove structure 42 do not form an axisymmetric structure. In other words, there is no axis of symmetry on the surface a, so that the first microgroove structure 41 and the second microgroove structure 42 are symmetrically arranged relative to the axis of symmetry.

In the same way, the "asymmetric third microgroove structure 41 and the fourth microgroove structure 42" in the present invention means that both the third microgroove structure 71 and the fourth microgroove structure 72 do not form an axisymmetric structure . In other words, there is no axis of symmetry on the surface b, so that the third microgroove structure 71 and the fourth microgroove structure 72 are arranged symmetrically with respect to the axis of symmetry.

In the present invention, the first microgroove structure 41 and the second microgroove structure 42 are asymmetrical in structure, and the third microgroove structure 71 and the fourth microgroove structure 72 are asymmetric in structure, so the capacitance and inductance on the two positions will be different. different, so as to produce at least two different resonance points, and the resonance points are not easy to cancel, which is beneficial to realize the rich multi-mode of the antenna.

The structures of the first microgroove structure 41 and the second microgroove structure 42 of the present invention may be the same or different. And the degree of asymmetry between the first micro-groove structure 41 and the second micro-groove structure 42 can be adjusted as required. Similarly, the structure forms of the third microgroove structure 71 and the fourth microgroove structure 72 of the present invention may be the same or different. And the degree of asymmetry between the third microgroove structure 71 and the fourth microgroove structure 72 can be adjusted as required. This results in a rich and tunable multi-mode resonance.

And according to the needs of the present invention, more micro-groove structures can be arranged on the same metal sheet, so that the antenna has more than three different resonant frequencies.

Specifically, the asymmetrical situation in the present invention may have the following several embodiments.

Fig. 1 is a schematic structural diagram of the first embodiment of the antenna. Fig. 2 is another perspective view thereof. In this embodiment, as shown in Figure 1, the first microgroove structure 41 and the second microgroove structure 42 on the surface of the dielectric substrate a are all open spiral ring structures, and the first microgroove structure 41 and the second microgroove structure The structures 42 are not interlinked, but the difference in size causes the asymmetry of the two structures; similarly, as shown in Figure 2, the third microgroove structure 71 and the fourth microgroove structure 72 on the surface of the dielectric substrate b are all open spirals Ring structure, but the difference in size leads to the asymmetry of the two structures; so that the antenna has at least two resonant frequencies. In addition, in this embodiment, the projections of the first metal sheet 4, the first feeder line 2, the second feeder line 3, the first microgroove structure 41, and the second microgroove structure 42 on the surface b of the dielectric substrate a are respectively the same as those of the first microgroove structure 42 on the surface b. The two metal sheets 7 , the third feeder 8 , the fourth feeder 9 , the third micro-groove structure 71 and the fourth micro-groove structure 72 are overlapped, which has the advantage of simplifying the process.

Fig. 3 is a schematic structural diagram of the second embodiment of the antenna. Since the structure of the surface b of the dielectric substrate is the same as that of the surface a, this figure only shows the structure of the surface a. In this embodiment, the first microgroove structure 41 and the second microgroove structure 42 on the surface of the dielectric substrate a are both open spiral ring structures and have the same size. The first microgroove structure 41 and the second microgroove structure 42 are not connected, but due to the arrangement of the positions of the first micro-groove structure 41 and the second micro-groove structure 42, the two structures are asymmetric.

Fig. 4 is a schematic structural diagram of the third embodiment of the antenna. Since the structure of the surface b of the dielectric substrate is the same as that of the surface a, this figure only shows the structure of the surface a. In this embodiment, the first microgroove structure 41 on the surface of the dielectric substrate a is a complementary helical structure, the second microgroove structure 42 is an open spiral ring structure, and the first microgroove structure 41 and the second microgroove structure 42 are not In the same way, it is obvious that the first micro-groove structure 41 and the second micro-groove structure 42 are asymmetrical.

In addition, in the above three embodiments, the first micro-groove structure and the second micro-groove structure can also realize the connection between the first micro-groove structure and the second micro-groove structure by hollowing out a new groove on the first metal sheet, Similarly, the connection between the third micro-groove structure and the fourth micro-groove structure can also be realized by hollowing out a new groove on the second metal sheet. After being connected, the first microgroove structure and the second microgroove structure are still asymmetric structures, and the third microgroove structure and the fourth microgroove structure are also asymmetric structures, so the effects of the present invention will not be greatly affected. Likewise, the antenna can have at least two or more resonant frequencies.

In the present invention, regarding the processing and manufacturing of the antenna, as long as the design principle of the present invention is satisfied, various manufacturing methods can be adopted. The most common method is to use various printed circuit board (PCB) manufacturing methods. Of course, metallized through holes and double-sided copper-clad PCB manufacturing can also meet the processing requirements of the present invention. In addition to this processing method, other processing methods can also be introduced according to actual needs, such as the conductive silver paste ink processing method used in RFID (RFID is the abbreviation of Radio Frequency Identification, that is, radio frequency identification technology, commonly known as electronic tags), and various deformable devices. The flexible PCB processing, the processing method of the iron sheet antenna and the processing method of the combination of the iron sheet and the PCB. Among them, the combined processing method of iron sheet and PCB refers to the use of precise processing of PCB to complete the processing of the antenna micro-slot structure, and use iron sheet to complete other auxiliary parts. In addition, it can also be processed by etching, electroplating, drilling, photolithography, electron etching or ion etching.

The present invention also provides a device using the above bluetooth module, the device also has a PCB board, and the antenna is connected to the PCB board. Based on the above Bluetooth module 10, various electronic devices can use the Bluetooth module, such as printers, PDAs, desktop computers, fax machines, keyboards, game joysticks and all other digital devices can use the above Bluetooth module 10. In addition, the Bluetooth wireless technology based on the above-mentioned Bluetooth module 10 also provides a common interface for the existing digital network and peripherals to form a personal special connection device group application away from the fixed network.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, many forms can also be made without departing from the gist of the present invention and the protection scope of the claims, and these all belong to the protection of the present invention.

Claims (8)

1. a bluetooth module, comprise link management unit, link control unit and an antenna, it is characterized in that, described antenna comprises medium substrate, be attached to the first sheet metal and second sheet metal on relative two surfaces of medium substrate, first sheet metal is provided with the first feeder line, second feeder line, second sheet metal is provided with the 3rd feeder line, 4th feeder line, described first feeder line and the second feeder line are all by the first sheet metal described in coupled modes feed-in, described 3rd feeder line and the 4th feeder line are all by the second sheet metal described in coupled modes feed-in, on described first sheet metal, hollow out has asymmetrical first micro groove structure and the second micro groove structure to form the first metal routing on the first sheet metal, on described second sheet metal, hollow out has asymmetrical 3rd micro groove structure and the 4th micro groove structure to form the second metal routing on the second sheet metal, described first micro groove structure, second micro groove structure, 3rd micro groove structure and the 4th micro groove structure are complementary opening resonance loop structure, complementary helix structure, opening helical ring structure, one in two opening helical ring structure and complementary folding line structure or derived by several structure above, the micro groove structure that compound or group battle array obtain, described first feeder line is electrically connected with the 3rd feeder line, described second feeder line is electrically connected with the 4th feeder line, described antenna is preset with the space that electronic component embeds, at the first feeder line, second feeder line, between first feeder line and the first sheet metal, the space that electronic component embeds all is set between the second feeder line and the first sheet metal and on these five positions of the first sheet metal, first feeder line of described antenna and the second feeder line have the perceptual electronic component of embedding, between first feeder line and the first sheet metal and there is between the second feeder line and the first sheet metal the capacitive electrical element of embedding, first metal routing of the first sheet metal has perceptual electronic component and/or the resistance of embedding.

2. bluetooth module according to claim 1, it is characterized in that, described antenna also comprise be arranged on the 3rd feeder line, the 4th feeder line, between the 3rd feeder line and the second sheet metal, between the 4th feeder line and the second sheet metal and these five positions of the second sheet metal at least one on space.

3. bluetooth module according to claim 1, is characterized in that, the space be arranged on described first sheet metal comprises the space be arranged on the first micro groove structure and/or the second micro groove structure.

4. bluetooth module according to claim 2, it is characterized in that, the space be arranged on described second sheet metal comprises the space on the second metal routing of being arranged on the second sheet metal, or the space be arranged on described second sheet metal comprises the space be arranged on the 3rd micro groove structure and/or the 4th micro groove structure.

5. the bluetooth module according to claim 1 or 3, is characterized in that, described space is be formed in the pad on described antenna.

6. bluetooth module according to claim 1, is characterized in that, the scope of described perceptual electronic component inductance value is between 0-5uH.

7. bluetooth module according to claim 6, is characterized in that, the scope of described capacitive electrical component capacitance value is between 0-2pF.

8. comprise an equipment for the bluetooth module of any one in claim 1 to 7, it is characterized in that, described equipment also comprises a pcb board, and described antenna is by being connected with pcb board.